Compare power tool products by type, power, speed and features to support selection and procurement.
电动工具选型看功率与工况:电钻用于钻孔、角磨用于切割打磨。对比两者功率,功率高者更适合重负载工况;功率比反映工况跨度,辅助按任务选配机型与配件。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Power-to-weight ratio | The power-to-weight ratio equals rated input power divided by tool mass (W/kg); a higher value suits prolonged overhead work. | IEC 62841-1:2015, electric motor-operated hand-held tools |
| Battery energy density | Gravimetric energy density equals rated capacity times nominal voltage divided by cell mass (Wh/kg). | IEC 61960-3:2017, secondary lithium cells |
| Hand-transmitted vibration | The 8-hour equivalent vibration A(8) = a_hv × √(T/8); the daily exposure action value is 5 m/s². | ISO 5349-1:2001 & EU Directive 2002/44/EC |
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