Norseman Drill & Tool Type 36 Fractional 30º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 36 Fractional 30º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 36 Fractional Spiral Flute Semi-Bottoming Taps are engineered for smooth, reliable threading in softer and non-ferrous materials where clean chip evacuation and precision thread formation are essential. Featuring a 30º helix angle and a high-quality bright finish, these taps deliver excellent cutting action and extended tool life in applications ranging from aluminum and zinc to wood, epoxy-based plastics, refrigeration die castings, and automotive hardware.

Bright Finish for Clean, Efficient Cutting

The bright finish on Type 36 taps provides improved lubricity and a smooth cutting surface that reduces material buildup and friction. This finish is particularly effective when machining soft, gummy, or non-ferrous materials, helping produce cleaner threads, reduce heat generation, and prevent chip welding. The result is improved hole quality, longer tool life, and consistent performance in both manual and CNC operations.

Optimized 30º Helix Angle for Chip Control

Superior Chip Removal in Blind and Through Holes

The 30º helix angle offers the ideal balance of cutting aggressiveness and control, making it highly effective for lifting chips out of the hole during the tapping process. The spiral flute design enhances chip evacuation, preventing clogging and minimizing the risk of tap breakage. This geometry is especially important when working in deep or blind holes where chip buildup can compromise thread accuracy.

Semi-Bottoming Design for Versatile Threading

Near-Bottom Thread Formation

Semi-bottoming taps are designed to cut full-form threads close to the bottom of a blind hole while still offering easy entry and stable performance. This makes the Type 36 tap a versatile choice for a broad range of fractional-inch tapping requirements.

Key Advantages

• Bright finish ensures smooth cutting and excellent chip control

• Ideal for aluminum, zinc, copper, wood, die castings, and plastics

• 30º helix angle improves chip evacuation and reduces torque

• Spiral flute geometry supports clean threading in blind or through holes

• Fractional sizing ensures compatibility with standard inch-based tooling

For machinists seeking clean finishes, smooth cutting action, and dependable performance, Norseman Type 36 Bright Finish Spiral Flute Semi-Bottoming Taps deliver exceptional results across a wide range of materials.