Model Number: Worm Gear Hob Brand Name: DTR Key Specifications/Special Features: Worm gear hobA worm hob is designed based on the worm shaft specification. There are no standards for worm gear hobs.Generally this hob is manufactured as ‘ZK’ type. Since the overall dimensions of the hob are determined by the worm shaft and worm wheel data, please specify the following data when ordering:1. Normal or axial module, DP
2. Out dia or pitch dia of worm
3. Worm lead angle
4. Number of threads and hand of thread
5. In case of shank type, shank standard
6. Contact ratio (Non-Standard): Standard contact ratio is generally 20~30%, and users can select either hole or shank type.

* CAVEX WORM - It’s different based on the tooth maker. Please discuss when you order.
* The out-diameter of hob is decided with out-diameter of worm and sometimes it’s impossible to produce with an Arbor Type Hob.

When ordering a combination worm hob and arbor, please provide the arbor specification, taper of the hobbing machine, setting bolt standard and hob rotating direction.
In addition specify whether the contact of the arbor is right or left.