T10 mm (.3937″) Pitch
Pulleys with 12 to 16 grooves have 1 set screw; 18 to 40 grooves have 2 at 90°, 44 to 60 grooves do not have tapped holes.
* D tolerance: From 12 to 32 grooves is – 0.05From 36 to 60 grooves is – 0.08
Pulleys with 12 to 16 grooves have 1 set screw; 18 to 40 grooves have 2 at 90°, 44 to 60 grooves do not have tapped holes.
* D tolerance: From 12 to 32 grooves is – 0.05From 36 to 60 grooves is – 0.08