Usage: Involute Spline Hob GB/T1104-72 for processing involute profile centering flat tooth root involute spline shaft.

Characteristics and accuracy: hob made ​​of a single head, right hand, axial straight groove, zero rake angle. The hob is divided into A and B grade.

Tool marking and examples:
Please specify when ordering: name, model, modulus, pressure angle, accuracy class.

Example: Involute spline hob GW15-B1-003 m1 is α30 ° A