🔧 通用工程工具

🖨️ 3D打印时间估算Time 33 输入层厚、填充率、模型体积与打印速度，估算 FDM 打印总时长、耗材质量与长度。Time 33 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 两数之和/乘积最大/最小（数学题）Max/Min Sum & Product of Two Numbers 两数之和/乘积最大最小数学题工具。输入两数及约束，求在和或积条件下的最大/最小值，用于初中数学最值问题的即时演算与练习。Solve math problems for the maximum/minimum sum or product of two numbers. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Pa... 🎹 乐器调音频率计算Frequency 3 乐器调音频率计算器。基于十二平均律以 A4 为基准，计算钢琴全部 88 键（A0–C8）的音名与对应频率，用于乐器调音、声学校准与乐理学习。Frequency 3 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🚗 二手车残值估算Estimate 14 输入新车价、车龄与年里程，按年限法与里程法估算二手车残值，并给出综合估值。Estimate 14 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚖️ 云台相机重心计算Gravity 输入各部件重量与距云台轴的力臂（正值为镜头前方，负值为配重后方），计算合成重心与力矩平衡。Gravity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 人体（存在/微动）检测Detector 16 人体存在传感器选型工具。输入检测距离、安装高度、环境温度与检测方式，推荐合适的人体存在/微动传感器类型（如雷达、红外），用于智能安防与照明选型。Detector 16 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 低噪音寿命评估Lifespan 18 输入初始噪音等级、噪音限值、轴承转速与载荷，基于噪音增长速率模型估算低噪音轴承在超标前的保持寿命，辅助低噪音轴承选型与维护。Lifespan 18 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 低油雾寿命计算Lifespan 23 根据油品类型、工作温度和转速，结合 Arrhenius 温度衰减模型与转速蒸发因子，估算低油雾设计下润滑油的使用寿命，帮助工程师制定合理的换油周期与油雾控制方案。Lifespan 23 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 低磨损寿命Lifespan Wear 2 根据磨损率、允许磨损量和日运行时间，结合磨损类型加速因子，计算耐磨零件的磨损寿命、已磨损量和建议检测周期，为设备状态维护与备件库存计划提供参考。Lifespan Wear 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 修磨（磨刀/检测/寿命）服务Detector Lifespan 刀具修磨（磨刀）服务工具。输入刀具类型、材质、磨损量与已使用次数，评估修磨方案与寿命预估，用于刀具维护排程与成本管理。Detector Lifespan - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 健康（防护/检测/替代）管理Health ( Protection / Detect / Alternative ) Management 职业健康（防护/检测/替代）管理工具。输入职业危害因素，评估健康风险等级（分数）并给出防护、检测与替代建议，用于职场职业健康风险管理。Health ( Protection / Detect / Alternative ) Management - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. P... 🔬 光刻分辨率估算Estimate 36 输入光源波长与数值孔径 NA，按瑞利判据估算光刻分辨率与焦深（DOF），辅助半导体工艺节点评估。Estimate 36 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 💧 冷却液浓度维护Concentration 20 根据系统容量与当前/目标浓度，计算需补充的原液量或水量（支持直接补加与排液置换两种方案）Concentration 20 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 减速机选型Torque 1 根据电机功率、输入转速、减速比和安全系数，计算输入扭矩、输出扭矩和选型扭矩，支持斜齿轮、行星齿轮、蜗轮蜗杆和伞齿轮四种类型，并推荐合适机座号。Torque 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 制冷设备选型Refrigeration Equipment Sizing 输入制冷量、蒸发温度与冷凝温度，计算卡诺理想 COP、实际 COP 与输入功率，并依据制冷量范围推荐压缩机类型与制冷剂。Size refrigeration equipment and estimate ideal Carnot COP from cooling load and temperatures. Free online tool on ToolBox — 100% client-side, no data uplo... ❄️ 制冷量选型计算Pressure 18 根据房间面积、层高、朝向与人员数量，逐项估算室内冷负荷并推荐合适的空调机型和制冷量，适用于家庭、商铺及办公场所的空调容量选型与配置规划。Pressure 18 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 制动力矩计算Torque Response 根据转速、转动惯量和制动时间，计算所需制动力矩、峰值功率和制动能量，支持纯惯性制动、阻力辅助和提升反向负载三种工况，为制动器、离合器的选型提供数据依据。Torque Response - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛑 刹车片更换周期Brake Pad Replacement Interval Calculator 根据刹车片当前摩擦片厚度和磨损速率，结合车辆使用强度，计算剩余可行驶里程并给出更换建议，帮助车主提前规划保养、避免因磨损过度引发制动失效。Estimate brake pad replacement interval from current, new and wear-rate thickness. Free online tool on ToolBox — 100% client-side, no data uploaded, no ins... 🧪 化学配比安全计算Chemistry Ratio Security Calculate 输入物料总量与 A/B 组分配比，计算各组分量、安全余量及反应放热估算，提示混合比例风险，辅助实验室与化工生产中的安全配料与反应放热控制。Chemistry Ratio Security Calculate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General En... 🔧 单位前缀换算（nano/micro/milli/kilo等）Unit Prefix Convert 输入带 SI 词头的数值（如 nano、micro、milli、kilo），在词头与 10 的幂之间换算，用于科学计数、单位前缀转换与物理量数量级整理。Unit Prefix Convert - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Ge... 🛢️ 压力容器壁厚计算Temp Pressure 3 按 GB 150 标准，输入设计压力、内径、许用应力与焊缝系数，计算内压圆筒所需壁厚，并计入腐蚀裕量与材料负偏差，确保安全。Temp Pressure 3 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🗜️ 压缩机选型计算Pressure Flow 4 基于绝热压缩过程模型，输入排气量和排气压力，计算理论功率、轴功率并推荐压缩机机型与电机配置，适用于空气压缩、工艺气体增压等系统的设备选型。Pressure Flow 4 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔌 厨电功率匹配Power 7 根据厨房电器总功率与同时使用系数，计算需用功率、计算电流，推荐断路器规格与导线截面积Power 7 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚡ 变压器选型Power Voltage 1 根据负载总功率、功率因数与电压等级，计算视在功率、计算电流，推荐标准变压器容量与负载率Power Voltage 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 可回收性评估Lifespan 8 输入材料类型、质量、回收率与原生/再生能耗，计算可回收指数、节能效益、碳减排与等效环境效益，为绿色材料选型与产品全生命周期评估提供量化决策数据。Lifespan 8 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 可回收材料评估Lifespan 10 输入材料类型与工况条件，综合评估可回收性评分、预计使用寿命与环境适配度Lifespan 10 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛍️ 境外购物退税估算（通用）Overseas Shopping Tax Refund Estimate ( General ) 输入购物金额、退税率与手续费率，估算应退税额、手续费及实际到手金额，并支持汇率换算。Overseas Shopping Tax Refund Estimate ( General ) - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of... ➗ 复数计算器（通用）Complex Calculator ( General ) 输入两个复数的实部与虚部，自动计算加、减、乘、除结果及各自的极坐标（模与辐角）。Complex Calculator ( General ) - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of... 🔧 多光谱（NDVI）分析Analysis 21 多光谱 NDVI 分析工具。输入近红外与红光反射率，计算归一化植被指数 NDVI，用于遥感植被覆盖、作物长势与生态监测的分析参考（结果仅供参考）。Analysis 21 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 安装（施工/调试/检测）服务Detector 173 设备安装服务工具。输入设备类型、安装环境、功率与电压，生成安装检查与调试指南（含设备与环境建议），用于工程设备安装前的方案自检。Detector 173 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 密封件寿命计算Lifespan 7 基于 Arrhenius 热老化模型与 PV 值评估，输入密封材质、工作温度、压力与转速，综合温度、压力、速度与介质因子估算密封件使用寿命，为密封设计与备件更换计划提供依据。Lifespan 7 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 导线载流选型Voltage 9 输入电流、环境温度、敷设方式与线路长度，按载流量选择铜导线截面，并校验线路压降和线损功率，满足载流量与压降双重要求。Voltage 9 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 工业泵选型Industrial Pump Selector 输入流量、扬程与介质类型（清水/腐蚀性液体等），计算工业泵的轴功率与电机功率，并从标准序列推荐泵型、材质与转速，用于泵选型。Select an industrial pump from flow rate, head and medium type. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the G... 🔧 工业设备功率匹配Industrial Equipment Power Matching 输入负载力、运动速度和传动效率，计算所需理论功率与选型功率，并从标准电机功率序列中推荐合适的电机规格，同时估算额定扭矩和电流，用于机械传动系统的电机选型。Match motor power to load, speed and drive efficiency. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General En... 🏗️ 工程投资估算Engineering Investment Estimate 输入建筑面积与各分项单价指标（如土建、安装、装修），快速估算工程总投资概算及单方造价，辅助项目前期投资测算。Engineering Investment Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engin... 📊 工程造价指数计算Construction Cost Index Calculator 输入基期与报告期的材料、人工、机械价格及权重，计算各项造价指数与综合造价指数涨跌幅度。Compute construction cost indices from materials and labor. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Gener... 🧾 工程造价税率计算Tax 输入工程不含税造价，按建筑业增值税 9% 及附加税费计算各项税额与含税造价。Tax - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🏗️ 工程造价调差计算Construction Cost Adjustment Calculator 输入材料、人工、机械三类要素的基期价、报告期价及权重，计算综合调差系数、调差额与报告期造价。Adjust project cost by material, labor and equipment indices. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Gen... 🎂 年龄计算（精确到天）Age Calculator (Exact to Day) 输入出生日期，计算精确年龄（年/月/日）、总天数、下次生日倒计时、生肖与星座。Compute exact age in years, months and days. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 幻方生成器（奇数阶）Generator 25 幻方生成器（奇数阶）。输入奇数阶数 n，按经典算法生成每行/列/对角线之和相等的幻方（含目标和），可直接复制，用于数学游戏与算法演示。Generator 25 - generate results online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General... 🎰 彩票中奖税后金额计算Lottery After-Tax Prize Calculator 输入中奖金额与拟捐赠金额，计算偶然所得税、税后所得及公益捐赠可抵税额。Compute windfall tax and net lottery prize. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering t... 🔧 微加工（精度/热影响）评估Assessor 20 微加工（精度/热影响）评估工具。输入加工精度、热影响区宽度、切割速度与激光功率，综合评估微加工质量并给评分等级，用于激光/精密加工工艺自检。Assessor 20 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 快冷材料热疲劳Lifespan 25 输入冷却速率、温度循环幅值与材料参数，按 Coffin-Manson 公式计算热疲劳寿命Lifespan 25 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 执行器选型Torque Motion 输入负载力、行程、动作时间与安全系数，计算执行器选型推力与电机功率，支持丝杠推杆、齿轮齿条、蜗轮丝杠三种类型匹配。Torque Motion - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 扭矩补偿计算Torque 3 根据系统额定扭矩，考虑温度膨胀补偿、磨损间隙补偿和动载荷系数，计算实际所需的补偿扭矩，用于传动系统设计与扭矩裕量评估，确保变工况下输出精度与可靠性。Torque 3 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 技术支持（设计/选型/检测）Detector 175 技术支持（设计/选型/检测）工具。按应用场景推荐设备类型并给出设计、选型与检测要点，用于售前技术支持方案的快速生成与对照。Detector 175 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚙️ 投资（偏差/分析/纠偏）方法Investment 投资（偏差/分析/纠偏）方法工具。输入计划与实际投资数据，计算偏差率并按通用财务规则给出纠偏建议，用于工程项目投资管控（结果仅供参考）。Investment - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 抗风（等级）性能评估Assessor 19 抗风（等级）性能评估工具。输入建筑高度、体型与基本风压，按 μz、βz 等系数评估抗风等级与风荷载，用于建筑与幕墙抗风设计参考。Assessor 19 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚙️ 指标（单方/平米/延米）分析Metric 指标（单方/平米/延米）分析工具。输入工程量的单价与面积/长度基数，测算单方、平米、延米等指标值，用于工程造价与材料用量核算（结果仅供参考）。Metric - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔄 换热器选型计算Heat Exchanger Sizing Calculator (LMTD) 根据热流量、冷热流体进出口温度与总传热系数，计算对数平均温差（LMTD）与所需换热面积Size a heat exchanger by LMTD method. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 搅拌摩擦焊参数计算Pressure Weld 输入主轴转速、下压力与焊接速度，估算摩擦热输入功率及单位线能量（基于轴肩摩擦模型）。Pressure Weld - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 数字谜题生成（24点游戏）Generator 24 随机给出四张牌生成 24 点题目，可求解提示与步骤，适合算术思维训练与聚会游戏，纯前端出题。Generator 24 - generate results online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General... 🚁 无人机巡查效率计算Speed 7 输入飞行参数与相机视场角，估算单航线地面覆盖面积、有效扫描带宽及巡查作业时间。Speed 7 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛸 无人机悬停误差计算Drone Hovering Error Calculator 输入 GPS 定位精度、气压计精度与风速，估算无人机悬停时的水平、垂直位置误差及综合误差。Estimate UAV hover error from GPS, barometer and wind effects. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Ge... 🚁 无人机航程计算Calc Speed Capacity 输入电池容量、平均电流与飞行速度，估算无人机续航时间、最大航程与电池能量。Calc Speed Capacity - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Genera... 📡 无线图传距离估算Distance Power Frequency 输入发射功率、频率、收发天线增益与接收灵敏度，用 Friis 自由空间路径损耗公式估算视距最大传输距离。Distance Power Frequency - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 📅 日期差计算（工作日/自然日）Date Difference Calculator (Workdays / Calendar Days) 输入起止日期，计算自然日天数、工作日天数（排除周末）、相隔周数与月数。Compute calendar and workday differences between two dates. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Gener... 🔧 替代（产品/方案/推荐）支持Alternative - ( Product / Plan / Recommend ) Support 替代（产品/方案）推荐工具。按输入的产品或方案特征，生成可替代的产品/方案推荐清单，用于选型比价与备选方案快速生成。Alternative - ( Product / Plan / Recommend ) Support - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. 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Part of the General Engineerin... 🔧 检测（刚度/载荷/疲劳）服务Detector 159 机械部件三项力学性能检测工具。评估刚度、额定载荷与疲劳寿命并做合格判定，注明仅作工程估算与自检参考、正式报告须由第三方机构完成。Detector 159 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（压缩/回弹/老化）服务Detector Aging 2 泡沫材料三项检测工具。评估压缩强度、回弹率与老化后质量变化三项指标，输出合格判定，检测报告可用于质量验收，用于泡沫材料品质自检。Detector Aging 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（孔径/强度/寿命）服务Detector Strength Lifespan 零件三项检测工具。评估孔径偏差、抗拉强度与使用寿命三项指标，输出合格判定，检测报告可用于质量验收，用于机械零件进场自检。Detector Strength Lifespan - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineerin... 🔧 检测（密封/压力/扭矩）服务Detector Pressure Torque 阀门三项检测工具。评估密封泄漏率、耐压与拧紧扭矩三项指标，输出合格判定，检测报告可用于质量验收，用于阀门进场自检。Detector Pressure Torque - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 检测（导热/阻燃/环保）服务Detector 121 建筑保温材料三项检测工具。评估导热系数、阻燃等级与环保达标率三项指标，输出合格判定与检测报告可用性提示，用于保温材料进场验收自检。Detector 121 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（张力/长度/寿命）服务Detector Length Lifespan 带材三项检测工具。评估张力强度、长度偏差与疲劳寿命三项指标，输出合格判定，检测报告可用于质量验收，用于带材品质自检。Detector Length Lifespan - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 检测（成分/性能/质量）服务Detector Composition 1 材料三项检测工具（成分/性能/质量）。评估主成分含量、性能合格率与质量综合评分三项指标，输出合格判定，检测报告可用于质量验收，用于材料进场自检。Detector Composition 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering to... 🔧 检测（成分/纯度/环保）服务Detector Composition 化工产品三项检测工具（成分/纯度/环保）。评估成分符合率、纯度与环保达标率三项指标，输出合格判定，检测报告可用于质量验收，用于化工品进场自检。Detector Composition - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（扭矩/硬度/尺寸）服务Detector Hardness Torque 紧固件三项检测工具。评估拧紧扭矩、硬度与尺寸偏差三项指标，输出合格判定，检测报告可用于质量验收，用于紧固件进场自检。Detector Hardness Torque - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 检测（抗压/抗渗/环保）服务Detector 131 混凝土三项检测工具。评估抗压强度、抗渗等级与环保达标率三项指标，输出合格判定，检测报告可用于质量验收，用于混凝土材料进场自检。Detector 131 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（振动/游隙/精度）服务Detector 155 轴承三项检测工具。评估振动速度、游隙与旋转精度三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于轴承进场自检。Detector 155 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（接地电阻/防雷）服务Detector Resistance 1 电气系统三项检测工具（接地/防雷）。评估接地电阻、防雷等级与等电位连接电阻三项指标，输出合格判定，检测报告可用于质量验收，用于电气安全自检。Detector Resistance 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（断裂/伸长/耐磨）服务Detector 134 橡胶材料三项检测工具。评估断裂强力、断裂伸长率与磨耗量三项指标，输出合格判定，检测报告可用于质量验收，用于橡胶制品品质自检。Detector 134 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（无损/水压/气密）服务Detector Water Pressure 压力容器三项检测工具。评估无损检测合格率、水压保压时间与气密泄漏率三项指标，输出合格判定，检测报告可用于质量验收，用于压力容器进场自检。Detector Water Pressure - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering t... 🔧 检测（浓度/PH/细菌）服务Detector Concentration 消毒液三项检测工具。评估浓度、PH 值与细菌总数三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于消毒产品进场自检。Detector Concentration - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering to... 🔧 检测（浓度/PH/防锈）服务Detector Concentration 1 切削液三项检测工具。评估浓度、PH 值与防锈等级三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于切削液维护自检。Detector Concentration 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 检测（清洗/腐蚀/残留）服务Detector Corrosion 清洗剂三项检测工具。评估清洗效率、腐蚀速率与残留物三项指标，输出合格判定，检测报告可用于质量验收，用于工业清洗剂进场自检。Detector Corrosion - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（滴点/锥入度/腐蚀）服务Detector Corrosion 1 润滑脂三项检测工具。评估滴点、锥入度与腐蚀试验三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于润滑脂品质自检。Detector Corrosion 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（盐雾/湿热/吸附）服务Detector 205 材料三项耐候检测工具。评估耐盐雾、耐湿热与吸附性能三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于涂层/材料耐候性自检。Detector 205 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（硬度/磨耗/寿命）服务Detector Hardness Lifespan 1 工具钢三项检测工具。评估硬度、磨耗量与使用寿命三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于工具钢品质自检。Detector Hardness Lifespan 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineer... 🔧 检测（粒度/浓度/PH）服务Detector Concentration 2 粉体材料三项检测工具。评估平均粒度、悬浮液浓度与 PH 值三项指标，输出合格判定，检测报告可用于质量验收，用于粉体进场自检。Detector Concentration 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering ... 🔧 检测（粒度/硬度/寿命）服务Detector Hardness Lifespan 磨料三项检测工具。评估平均粒度、硬度与使用寿命三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于磨料品质自检。Detector Hardness Lifespan - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineerin... 🔧 检测（粘度/水分/酸值）服务Detector 200 润滑油三项检测工具（粘度/水分/酸值）。评估运动黏度、水分含量与酸值三项指标，输出合格判定，检测报告可用于质量验收，用于润滑油衰变进场自检。Detector 200 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（粘接/耐久/环保）服务Detector 126 结构胶三项检测工具。评估粘接强度、老化保持率与环保达标率三项指标，输出合格判定，检测报告可用于质量验收，用于结构胶粘剂进场自检。Detector 126 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（粘结/抗渗/环保）服务Detector 123 防水材料三项检测工具。评估粘结强度、抗渗等级与环保达标率三项指标，输出合格判定，检测报告可用于质量验收，用于防水工程材料自检。Detector 123 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（纯度/含水量/杂质）服务Detector 211 化工原料三项检测工具。评估纯度、含水量与杂质含量三项指标，输出合格判定，检测报告可用于质量验收，用于化工原料进场自检。Detector 211 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（纯度/水分/酸值）服务Detector 213 化工产品三项检测工具。评估纯度、水分含量与酸值三项指标，输出合格判定，检测报告可用于质量验收，用于化工品品质进场自检。Detector 213 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（绝缘/电阻/老化）服务Detector Resistance Aging 绝缘材料三项检测工具（绝缘/电阻/老化）。评估绝缘电阻、体积电阻率与老化后保持率三项指标，输出合格判定，检测报告可用于质量验收，用于绝缘材料维护自检。Detector Resistance Aging - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering... 🔧 检测（绝缘/电阻/耐压）服务Detector Resistance 高压绝缘材料三项检测工具。评估绝缘电阻、体积电阻率与耐压三项指标，输出合格判定，检测报告可用于质量验收，用于高压绝缘材料进场自检。Detector Resistance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（耐压/耐温/老化）服务Detector Aging 绝缘材料三项检测工具。评估耐压值、耐温值与老化寿命三项指标（依据 GB/T），输出合格判定，检测报告可用于质量验收，用于绝缘材料进场自检。Detector Aging - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（耐热/老化/安全）服务Detector Aging 1 材料三项耐热检测工具。评估耐热温度、老化后保持率与安全等级三项指标，输出合格判定，检测报告可用于质量验收，用于材料耐老化自检。Detector Aging 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（耐磨/拉伸/疲劳）服务Detector Stretch 材料三项力学性能检测工具。评估耐磨性、拉伸强度与疲劳性能三项指标，输出合格判定，检测报告可用于质量验收，用于材料力学自检。Detector Stretch - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（脱模效果/残留/环保）服务Detector 207 脱模剂三项检测工具。评估脱模力、残留量与环保达标率三项指标，输出合格判定，检测报告可用于质量验收，用于脱模剂进场自检。Detector 207 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（超声/磁粉/水压）服务Detector Water Pressure 1 焊缝三项检测工具。评估超声检测灵敏度、磁粉检测等级与水压试验三项指标，输出合格判定，检测报告可用于质量验收，用于焊接质量自检。Detector Water Pressure 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering... 🔧 检测（防爆/密封/防护）服务Detector Protection 2 电气设备三项检测工具。评估防爆等级、密封等级与防护等级（IP）三项指标，输出合格判定，检测报告可用于质量验收，用于电气设备进场自检。Detector Protection 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 检测（黏度/水分/闪点）服务Detector 128 润滑油三项检测工具。评估运动黏度、水分含量与闪点三项指标，输出合格判定，检测报告可用于质量验收，用于润滑油品质进场自检。Detector 128 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🌾 植保喷洒流量计算Calc Flow 输入喷头流量、喷头数量、喷幅与作业速度，计算每亩药液用量与作业效率，辅助植保无人机/喷雾机施药规划。Calc Flow - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineer... 📐 模具配合计算Mold Fit Calculator (ISO 286) 依据 ISO 286 公差体系，根据基本尺寸与配合代号（如 H7/g6）计算孔轴上下偏差及配合间隙/过盈Compute mold fits per ISO 286 (GB/T). Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🏗️ 模板支撑间距计算Formwork Support Spacing Calculator 按混凝土侧压力与单根支撑容许荷载（承载面积法）计算模板支撑间距与所需支撑根数Compute formwork support spacing by bearing-area method. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General ... 🎈 气体纯度流量计算Pressure Flow 6 根据目标纯度与原料气纯度，计算配制所需高纯气和稀释气的配气流量与混合比例，用于实验室配气、工业混合气体制备等需要精确控制气体浓度的场景。Pressure Flow 6 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 💧 水刀切割能力计算Pressure 5 输入水压、磨料流量、材料类型与厚度，评估水刀切割能力并估算切割速度与每米耗时。Pressure 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 水基液寿命计算Lifespan 24 依据浓度、温度和 ISO 污染度等级，综合评估水基切削液/冷却液的使用寿命，考虑浓度偏差、微生物繁殖与污染程度对液体劣化的影响，为液体维护、补充与更换提供数据支持。Lifespan 24 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🚰 水泵选型计算Flow 14 根据流量、扬程、介质密度与泵效率，计算水力功率、轴功率、电机功率并推荐标准电机规格Flow 14 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🎨 涂料用量计算Concentration 22 根据涂布面积、干膜厚度、固含量与损耗率，计算理论用量与实际用量（L/kg）Concentration 22 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 润滑油更换周期Lubricant Change Interval Calculator 输入油箱容量、工作温度与日运行时间，基于 Arrhenius 温度法则估算矿物油、半合成油、全合成油的推荐换油周期，制定润滑计划。Estimate lubricant change interval by Arrhenius law from oil capacity. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part o... 🛢️ 润滑油粘度选型Lubricant Viscosity Selector 根据工况温度、载荷和转速，对照 ISO 粘度等级推荐合适的润滑油类型和粘度级别，用于齿轮箱、轴承等摩擦副的润滑选型与换油规范制定。Select lubricant viscosity by temperature, load and speed. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Genera... 🔧 液压缸选型计算Flow Itinerary 根据缸径、行程、系统压力与活塞杆直径，计算推力、拉力、单行程容积与所需流量Flow Itinerary - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🧱 混凝土配合比计算（通用）Calc Strength Ratio 输入强度等级、水泥标号与骨料类型，按 Bolomey 公式计算水灰比及每立方米混凝土材料用量。Calc Strength Ratio - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Genera... 🔆 激光切割深度估算Power Focal 输入激光功率、焦距、切割速度与材料类型，基于线能量法估算最大切割深度、光斑直径与功率密度。Power Focal - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔴 激光焊接光斑计算Laser Welding Spot Calculator 输入激光功率、离焦量、光束质量 M² 与焦距，计算聚焦光斑直径、离焦光斑直径与功率密度。Compute laser weld spot size from Gaussian focus, M^2 and defocus. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of th... 🔵 激光熔覆厚度计算Laser Cladding Thickness Calculator 输入粉末流量、扫描速度与激光功率，估算单道熔覆层厚度、宽度、搭接步距与沉积速率。Estimate single-pass laser cladding height from powder mass and parabolic cross-section. Free online tool on ToolBox — 100% client-side, no data uploaded, ... 🌡️ 热成像温差判读Thermal Imaging Delta-T Reader 输入环境温度、目标发射率、检测距离等，估算红外热像仪最小可分辨温差（MRTD）与发射率引起的测量误差。Read infrared thermal delta-T from ambient temp and emissivity. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the G... 🔥 焊接工艺参数Welding Process Parameter Calculator 根据母材材料厚度和所选焊接方法（如 MIG、TIG、手工电弧焊），计算推荐焊接电流、电弧电压、焊接速度与热输入，指导工艺评定与现场焊接参数设定。Set welding parameters by material thickness and process (SMAW/TIG/MIG). Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part... 💡 照明色温亮度配置Color Temp 2 选择应用场景获取推荐色温与照度，输入房间面积计算所需总光通量与灯具数量。Color Temp 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⛽ 燃油掺配比例计算Ratio Fuel Oil 按体积比例掺配两种燃油，计算混合油的密度、热值与能量密度，并评估掺配后的燃烧特性，用于船舶、锅炉等需要临时调配燃料以降低成本的混合油配制。Ratio Fuel Oil - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🌿 环保耐磨评估Eco-Friendly Wear Resistance Evaluator 输入材料类型、工作温度与湿度等使用环境参数，综合评估材料的耐磨等级与环保性评分，为绿色选材与产品改进提供依据。Evaluate eco-friendly wear resistance by material and environment (temp, humidity). Free online tool on ToolBox — 100% client-side, no data uploaded, no in... 🔧 生物稳定寿命评估Lifespan 5 输入工作温度、湿度、pH 值与紫外线强度，基于 Arrhenius 动力学与 Q10 温度系数估算材料的生物稳定性寿命，为材料选型与维护周期提供参考。Lifespan 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🧪 电化学钝化控制Electrochemical Passivation Controller 输入电位、电流密度与 pH 值，依据铁的 Pourbaix 图判断所处区间（免蚀/活化/钝化/过钝化）并估算腐蚀速率。Control electrochemical passivation of iron by the Pourbaix (E-pH) diagram. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. P... 🔌 电子束焊接参数Voltage 输入加速电压、束流与焊接速度，计算电子束功率、线能量、功率密度及估算熔深。Voltage - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛠️ 电机轴承维护周期Motor Bearing Maintenance Interval 依据速度因数 dn 值与润滑方式，估算轴承补油（补脂/换油）周期与整体更换周期Estimate motor bearing maintenance interval from bore and speed (dn factor). Free online tool on ToolBox — 100% client-side, no data uploaded, no install. ... 🏭 电机选型Power Voltage 根据负载转矩、转速与电压，计算所需功率，推荐标准电机功率等级、极数与电机系列型号Power Voltage - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚡ 电机选型计算Motor Sizing Calculator 根据负载功率、转速与传动效率计算所需电机功率，匹配 IEC 标准功率等级并核算转矩Compute required motor power from load and efficiency. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General En... 🔧 电缆截面积选型Voltage 8 根据载流量、电缆芯数、敷设方式和环境温度，计算综合校正系数并从铜芯电缆标准截面序列中推荐合适规格，适用于供配电系统电缆选型与线路载流能力校核。Voltage 8 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚡ 电解速率计算Voltage Current 1 基于法拉第电解定律，输入电流、电解时间与电化当量，计算沉积质量、镀层厚度与电流效率。Voltage Current 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚙️ 皮带传动选型Power 16 根据传递功率、主动轮转速与传动比，推荐 V 带型号、最小带轮直径、带速、中心距与基准长度Power 16 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 皮带张紧计算Belt Tension Calculator 根据 V 带型号、中心距、小带轮转速和传动功率，计算带速、所需皮带根数、单根张紧力、总张紧力和跨距中点挠度，为皮带传动系统的安装、调试与张力调整提供数据依据。Calculate V-belt tension from pitch, center distance, speed and power. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part o... 🔧 磨损率计算Wear 4 基于 Archard 磨损方程，输入材料硬度、接触压力、滑动速度与摩擦系数，计算体积磨损率与预估磨损深度Wear 4 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛠️ 磨料硬度选型Hardness 14 根据工件材料硬度与加工类型（粗磨/精磨/抛光），推荐合适的磨料种类、粒度号与砂轮线速度Hardness 14 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚛️ 离子束溅射计算Ion Beam Sputtering Calculator 输入离子能量、入射角、靶材原子序数与离子电流密度，估算溅射产额与刻蚀速率。Compute ion beam sputtering yield from energy, angle, target Z and current density. Free online tool on ToolBox — 100% client-side, no data uploaded, no in... 🔧 科学记数法转换（标准↔小数）Convert 21 在科学记数法与标准小数之间互转，处理超大或极小数值并保留有效数字，适合科学计算与作业校对，纯前端换算。Convert 21 - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Eng... 🧪 稀释配比计算器Calc Ratio 2 输入原液浓度、目标浓度与需要配制的总量，计算原液与水的用量及稀释倍数。Calc Ratio 2 - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engin... 🌬️ 空气质量指数计算Air Quality Exponent Calculate 输入六项污染物浓度，按国标 HJ 633-2012 计算 AQI、首要污染物及健康建议（CO 输入 mg/m³）。Air Quality Exponent Calculate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engine... 🔧 空调冷负荷计算AC Cooling Load Calculator 综合围护结构传热、日射得热、人员散热、设备发热、照明发热和新风负荷，逐项计算房间总冷负荷并推荐空调配置方案，适用于住宅、办公室等空间的空调系统选型。Compute HVAC cooling load from envelope, solar, occupancy and equipment gains. Free online tool on ToolBox — 100% client-side, no data uploaded, no install... ⚡ 等离子切割厚度计算Speed 9 输入切割电流、切割速度、弧温与喷嘴孔径，估算等离子弧最大可切厚度与切缝宽度。Speed 9 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🧊 管道保温层厚度计算Pipe Insulation Thickness Calculator 按控制保温表面温度（默认 50℃）的稳态导热模型，迭代求解保温层厚度并核算散热损失Compute insulation thickness to control surface temperature. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Gene... 🧲 粘结强度计算Bond Strength Calculator 根据粘结面积和胶水剪切强度，计算接头可承受的最大载荷与安全许用载荷，并通过安全系数评估粘结可靠性，用于结构胶接、复合材料粘接等装配工艺的强度校核。Compute adhesive bond strength from area and shear strength. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Gene... 🔧 精密设备选型Precision Equipment Selector 依据定位精度、负载、行程和移动速度等要求，推荐合适的直线导轨规格（HGR 系列）和滚珠丝杠参数（直径、导程、精度等级），并计算所需转速和驱动扭矩，用于精密自动化设备设计。Select precision equipment by accuracy, load, stroke and speed. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the G... 🔧 精密轴承寿命Lifespan 20 输入精度等级、载荷与转速，计算精密轴承 L10 额定寿命与精度保持寿命Lifespan 20 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 紧固件强度校核Strength 34 输入螺栓规格、强度等级与受力状态（拉伸/剪切），校核螺栓的拉伸应力与剪切应力是否满足许用要求，判断紧固件连接是否安全可靠。Strength 34 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 纪念币/邮票品相评分辅助Rater 1 按 NGC/Sheldon 70 分制（纪念币）与 PSE 100 分制（邮票）的瑕疵扣分模型，辅助评估品相等级Rater 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ✂️ 线切割精度计算Speed 8 输入钼丝径、切割速度与工件厚度，估算实际进给速度、表面粗糙度 Ra 及对应加工精度等级。Speed 8 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 📈 线性回归计算器（通用）Linear Regression Calculator ( General ) 线性回归计算器（通用）。输入多组 (x,y) 数据点，最小二乘拟合直线、给出斜率截距与相关系数，用于趋势预测与相关性分析，需至少 2 组数据。Linear Regression Calculator ( General ) - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no instal... 🔧 统计学分布计算（正态/泊松/二项）Calc Stats 1 统计学分布计算器。输入参数后计算正态分布、泊松分布、二项分布的密度/概率与分位数，用于概率统计教学与数据分析的即时演算。Calc Stats 1 - calculate online, free and accurate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engin... 🔧 维修（修复/更换/测试）服务Tester 40 设备维修（修复/更换/测试）服务工具。输入设备类型、故障类型、维修方式与测试项目数，生成维修方案与测试验收指南，用于运维维修排程。Tester 40 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 维修（更换/保养/测试）服务Tester Maintenance 设备保养（更换/保养/测试）服务工具。输入设备类型、保养等级、使用年限与累计运行小时，生成保养计划与更换清单，用于预防性维护管理。Tester Maintenance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 维修（更换/调整/检测）服务Detector 194 设备维修服务工具。输入设备类型、故障现象、使用年限与运行状态，生成故障维修方案与检查清单（含设备与故障提示），用于运维维修的自检与排程。Detector 194 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚙️ 耐磨性评估计算Wear Resistance Evaluator 基于 Archard 磨损方程，计算材料在滑动摩擦条件下的磨损率和耐磨等级Evaluate wear resistance with the Archard wear equation. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General ... 🔧 耐腐蚀寿命Lifespan Corrosion 根据材料腐蚀速率、初始壁厚和腐蚀裕量，结合环境等级修正，计算设备和管道的剩余寿命、当前壁厚和建议检测周期，为腐蚀防护、设备管理与检修计划提供决策依据。Lifespan Corrosion - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 联轴器选型Torque 2 输入额定扭矩、工况系数与安全系数，计算选型扭矩的大小，并推荐弹性柱销、齿式、膜片或万向等联轴器类型，适用于各类传动场合。Torque 2 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 能耗（统计/预测）仪表Stats Energy 录入分项能耗数据生成趋势与占比图表，按历史估算短期用量，用于用电管理与节能分析，纯前端可视化不出境。Stats Energy - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛡️ 脚手架安全验算Scaffold Safety Verification 按扣件式钢管脚手架（Φ48×3.5）立杆稳定性公式，验算轴力、长细比与安全系数Verify single-standard coupler scaffold safety under load. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Genera... 🏗️ 脚手架用钢量计算Scaffold Steel Quantity Calculator 按双排扣件式钢管脚手架（Φ48×3.5）估算立杆、横杆、剪刀撑数量与总用钢量Compute steel quantity for double-row coupler scaffolds. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General ... 🎨 色差强度质量评估Strength Color Diff 输入标准样与试样的 CIE Lab 色度值，计算 ΔE 色差、色牢度灰卡等级并给出合格判定。Strength Color Diff - compare online, free and clear. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Eng... 🔧 节能寿命计算Lifespan 12 输入设备功率、运行时间、节能率与电价，计算全寿命期节能收益与投资回报周期Lifespan 12 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🌱 节能方案计算Energy-Saving Plan Calculator 输入设备功率、运行时间与节能率，计算年节电量、节约电费、碳减排及节能改造投资回收期。Estimate annual energy savings from power, runtime and saving rate. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of t... 🔬 蚀刻时间计算Temp Time Concentration 根据蚀刻液浓度和温度估算蚀刻速率，计算达到目标刻蚀深度所需的时间，并提示温度波动对均匀性的影响，用于半导体、PCB 及金属表面处理中的蚀刻工艺控制。Temp Time Concentration - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering t... 🔧 螺栓拧紧扭矩Torque 根据螺栓规格（M6-M30）、强度等级（4.8-12.9 级）和摩擦系数，计算拧紧扭矩、预紧力和实际应力，为螺栓装配提供准确的扭矩控制参考，防止过紧或预紧不足。Torque - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔩 螺纹加工参数Thread 4 根据螺纹规格（如 M10×1.5）和材料类型，计算切削速度、主轴转速和每转进给量，并给出推荐刀具与切削液建议，用于车削、攻丝等螺纹加工工艺的参数设定。Thread 4 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🏗️ 设备租赁费率计算Equipment Lease Rate Calculator 输入设备原值、预计租期、折旧年限与维护费率，计算月折旧、月租金、总租金收入及投资回报率。Compute equipment lease rate by straight-line depreciation, maintenance and target margin. Free online tool on ToolBox — 100% client-side, no data uploaded... 🔧 设备维护周期Equipment Maintenance Interval Calculator 根据设备类型、运行工况与负荷水平，计算润滑、巡检、大修等推荐维护周期，为工厂设备管理制定预防性维护计划，降低突发故障与停机损失。Plan equipment maintenance interval by type and daily runtime. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Ge... ✅ 质量验收抽样Acceptance Sampling Planner 基于计数标准型抽样检验，输入批量、样本、判定数和发现不合格品数，判定批次接收/拒收Plan acceptance sampling by lot size N and standard attribute plans. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of ... 🔧 质量（标准/检测/环保）保障Detector 118 质量（标准/检测/环保）保障工具。输入产品标准符合度、检测合格率与环保达标情况，综合评分并给出提升建议（推进体系认证、提升合格率），用于质量管控参考。Detector 118 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 📡 超声加工参数Frequency 15 输入超声频率、振幅与工具直径，计算振动速度、加速度、功率密度及材料去除率。Frequency 15 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. ⚙️ 轴承当量负荷计算Bearing Load 根据径向力 Fr、轴向力 Fa 及径向/轴向载荷系数 X、Y，计算当量动载荷 P = X·Fr + Y·FaBearing Load - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔩 轴承额定寿命计算Bearing 1 依据 ISO 281 基本额定寿命公式 L10=(C/P)ᵖ，计算轴承疲劳寿命（百万转 / 小时 / 年）Bearing 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 输送带选型计算Conveyor Belt Sizing Calculator 根据输送量、输送距离和倾角，采用槽形截面物料流公式与 DIN 22101 简化功率模型，计算所需带宽和驱动功率，适用于散料输送带的初步选型与电机配置。Size conveyor belt width and drive power from capacity, distance and incline. Free online tool on ToolBox — 100% client-side, no data uploaded, no install.... 🔧 逻辑真值表生成器（表达式输入）Generator 23 输入逻辑表达式自动生成真值表并标出结果列，支持多变量与常用门，适合数字电路与离散数学学习，纯前端。Generator 23 - generate results online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General... ⛓️ 链传动选型计算Speed 26 输入传递功率、转速与传动比，按功率曲线推荐滚子链条型号与链轮齿数，并计算链条线速度，适用于机械传动的链条选型设计。Speed 26 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🏭 阀门选型计算Pressure Flow 5 根据流量、压差和介质密度计算阀门的 Cv/Kv 流量系数，并结合标准通径系列推荐合适的阀门口径，用于管道系统中调节阀、截止阀等阀门的选型与校核。Pressure Flow 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🛡️ 防爆电气选型Temp 26 根据爆炸性气体类别（IIA/IIB/IIC）和温度组别（T1-T6），组合生成防爆标志，提供典型气体参考、设备表面温度限值与推荐设备类型，辅助危险场所的防爆电气选型。Temp 26 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 防腐涂层寿命Lifespan 6 按 ISO 12944 标准，输入涂层厚度、腐蚀速率、环境等级（C1–C5）与已使用年限，计算防腐涂层剩余寿命与健康度，并给出维护建议。Lifespan 6 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 陶瓷轴承寿命计算Ceramic Bearing Life Calculator 输入轴承载荷与转速，计算陶瓷（混合）轴承 L10 额定寿命并对比钢轴承Compute ceramic bearing L10 rated life by ISO 281. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engine... 🔧 面料克重计算Fabric 1 输入纱线线密度、经纬密度与幅宽，计算面料每平方米克重（GSM）及总重量Fabric 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 面料质量评估Fabric 3 输入经纬纱支数、密度、缩水率与色牢度，计算织物紧度、估算克重并给出质量等级（A/B/C）与改进建议，用于面料品质检验。Fabric 3 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🌀 风机选型计算Fan Sizing Calculator 输入所需风量、风压与转速，计算风机的轴功率并推荐电机功率与风机类型（离心/轴流），用于通风除尘与空调系统的风机选型。Size fan shaft and motor power from airflow and pressure. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General... 🔧 香烟尼古丁/焦油含量换算Convert Content 香烟尼古丁/焦油含量换算器。输入含量与换算系数，在质量、浓度等口径间换算尼古丁与焦油指标，用于控烟科普与成分对照，纯前端本地处理。Convert Content - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Genera... 🔧 高性能材料寿命Lifespan 9 按 Arrhenius 热降解模型与应力因子，估算高性能工程材料在工况下的使用寿命Lifespan 9 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools. 🔧 高温蠕变寿命Lifespan 26 输入工作温度、应力与材料常数，按 Larson-Miller 参数估算高温蠕变断裂寿命Lifespan 26 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the General Engineering tools.