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How is the machining depth of Tap calculated?
How is the machining depth of Tap calculated?
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Answer
How is the machining depth of Tap calculated?
To calculate the machining depth of the Tap , check the following lengths from the drawing instructions or the catalogue .
- Effective thread length
- chamfer length
- external center Length (please check the availability from the catalogue)
The approximate Tap machining depth required to meet the effective thread length is the length added above plus one pitch as a margin.
▽ Tap Machining Depth
| = | Effective Thread Length (X) | + | chamfer length (A) | + | external center length (B) | + | 1 pitch (C) |
| (Incomplete thread length) | (Tap overhang at the tip) | Margin |
D: Approximate length of point angle part of the drill = Drill diameter × 0.3
If there is no room for Pilot hole depth in the blind hole, it is effective if the external center has been removed and the chamfer length is short.
There are 1.5 and 1 chamfer length. External center removal.
1.5 chamfer length . External center removal.