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Step (1)
Check whether the screw you want to process is " through hole " or "blind hole", and open the relevant page of the general catalog "Tap Selection Criteria Table"
through hole : Screw is pierced
Blind hole: screw not penetrated
Step (2)
Calculate how many times the effective screw length is the tap outer diameter (D)
Example: When machining M6×1 with an effective thread length of 12 mm
M6X1 ⇒ Tap Outer Diameter 6mm
Effective thread length 12÷6 = 2 ⇒ 2D
Step (3)
Select the right tap for the workpiece material.
Please select from the "Tap Selection Criteria Table" in the General Catalog of Hole Machining Screw Machining Tools based on the workpiece material and hardness.
Step (4)
Check the shape, accuracy, etc. on the relevant page.
For screws equivalent to Class 2 and 6H, we recommend those with a tap accuracy STD.