Posted by Dimebag on June 08, 2024 at 04:40:42:
In Reply to: Base pitch error relate to profile error posted by Ross Marley on June 05, 2024 at 14:11:11:
Let's assume the nominal PA 20 degrees.
Nominal module: MN=7.5/Pi/cos(20)=2.540537 mm
PA of a tool with the same module and base pitch 7.48: PAG=ACOS(7.48/2.540537/Pi)=20.41563 degrees.
Profile error over tooth height of 2 x module: dh=2*2.540537/cos(20)*tan(20.41563-20)=0.039 mm.