Gear Shaper Cutters

These are primarily designed for cutting internal gears, splines and serrations, both spur and helical. But they may also be designed for externals, if required.

Shank type gear shaper cutters are full form generated however small the pitch circle diameter (PCD), although the strength of the cutter produced is the limiting factor.

The strength and rigidity of shank type cutters is greatly improved by the Dathan ribbing method and is especially advised for those of small PCD.

Dathan hub type cutters are designed for cutting internal components where maximum rigidity is required. They are recommended for cutting long face widths or for coarse pitches.

In general terms, any tooth form, face width or number of teeth that is available on a shank cutter can be manufactured with a hub type fitting.

Note: these cutters screw directly onto the spindle of the machine, therefore rely on the spindle being in a good true state.

Helical gear shaper cutters are mainly manufactured to customers specific requirements, especially in the form of single helical cutters, which are extensively used in the manufacture of automotive gear boxes. 

Single helical gear shaper cutters may also be designed for use in a thread or worm generating machine for the production of single or multi-start worms. These are usually cone sharpened.

Double helical cutters are used in matched pairs and are sharpened with their cutting edges ground parallel to the axis. These tools are used for cutting continuous double helical gears, which are used in the transmission of high loads in gear pumps and similar applications.

The extended back boss type cutter is designed to avoid the problems associated with obstructions on the work piece preventing full working movement.

This type of tool has the advantage that the clamping nut does not project below the cutting face. This is necessary where interference by web flange or fixture on the workpiece would prevent the use of a disc cutter.