Norseman Drill & Tool Type 37 Fractional 52º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 37 Fractional 52º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 37 Fractional Spiral Flute Semi-Bottoming Taps are engineered for superior threading performance in soft, ductile, and non-ferrous materials. Featuring a steep 52º helix angle and a precision Bright Finish, these taps deliver clean, accurate threads with excellent chip evacuation—making them a preferred choice for production machining, maintenance work, and high-precision fabrication.

Bright Finish for Cleaner Cuts and Smoother Threads

The Bright Finish enhances cutting efficiency by minimizing built-up edge and reducing friction against the work material. This finish is ideal for softer metals and non-metallic materials where additional coatings are unnecessary. Operators can expect improved surface finish, reduced galling, and extended tool life when working in recommended materials.

52º Helix Angle for Superior Chip Lifting

Designed for Deep Holes and Soft Materials

The aggressive 52º helix angle greatly improves chip evacuation, lifting chips out of the hole quickly to prevent packing and breakage. This makes Type 37 taps highly effective in materials that produce long, stringy chips, including:

• Aluminum

• Zinc

• Copper

• Wood

• Refrigeration die castings

• Auto hardware

• Epoxy-based plastics

This enhanced chip flow is especially beneficial when tapping deeper blind holes or through holes in soft, ductile materials.

Semi-Bottoming Geometry for Precision and Versatility

Ideal for Blind Hole Applications

Semi-bottoming taps allow threading closer to the bottom of blind holes while maintaining easier starting action than full bottoming taps. This versatility makes Type 37 taps suitable for a wide range of general-purpose machining operations.

Key Benefits

• Bright Finish improves lubricity and reduces material adhesion

• 52º helix angle ensures exceptional chip evacuation

• Produces clean, precise threads in soft metals and plastics

• Semi-bottoming design enhances accuracy in blind holes

• Fractional sizing ensures compatibility with standard tooling

For machinists seeking clean threading, excellent chip control, and dependable performance, Norseman Type 37 Bright Finish taps deliver outstanding results across multiple soft-material applications.