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攻丝钻头.
根据公称直径、螺距和螺纹百分比估算底孔直径。
Drill = major − pitch × (percent / 75). At 75% this matches the common one-pitch chart rule. It is a shop estimate, not a gauge inspection. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Tap drill
- 8.5 mm
Drill diameter = major diameter − pitch × (thread percent / 75). At 75% this is the common chart rule of one pitch under the major diameter. It is a shop estimate, not a thread-gauge inspection.
使用方法: 攻丝钻头
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英语技术说明
Drill = major − pitch × (percent / 75). At 75% this matches the common one-pitch chart rule. It is a shop estimate, not a gauge inspection. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Estimate a tap drill from the major diameter, pitch and a thread percentage. Drill = major − pitch × (percent / 75). At 75% this matches the common one-pitch chart rule. It is a shop estimate, not a gauge inspection. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
M10 × 1.5 at 75% thread → 8.5 mm.