Hertel 48538169 Threaded Shank Drill Bit 3/8 in Hss

Product Description

The HERTEL 48538169 is a threaded shank drill bit designed for precise, repeatable drilling in low-tensile strength materials. The bit measures 3/8 inch in diameter with a 135-degree split point that reduces walking and minimizes the need for a center punch. Overall length is 1.25 inches, making this a short-pattern bit suited for tight-clearance applications. The shank threads to a 1/4-28 specification for secure engagement in compatible threaded chucks and quick-change systems. Constructed from high speed steel with an oxide coating, this bit is built for general-purpose shop and field use by machinists, HVAC technicians, electricians, and plumbers who need a compact, reliable twist drill.

This bit is appropriate for drilling into aluminum, soft steel, plastics, and other low-tensile strength materials in both shop and field environments. Its short overall length makes it useful in confined spaces where standard-length bits cannot reach or fit properly. The 9/16-inch flute length and right-hand cutting spiral provide adequate chip evacuation for the shallow-depth holes this bit is sized to produce. The 1/4-28 threaded shank fits quick-change chuck systems commonly used on cordless and pneumatic drills in mechanical and electrical trade work.

Key Features

• 3/8 inch diameter with 135-degree split point reduces drill walking and improves hole accuracy
• 1/4-28 threaded hex shank for secure, tool-free engagement in compatible quick-change chucks
• Short pattern design at 1.25 inches overall length for use in tight or restricted spaces
• High speed steel construction with oxide coating for general-purpose durability
• Web-thinned, tapered web configuration reduces cutting force and thrust requirements
• Right-hand spiral flute with regular helix for consistent chip clearing in low-tensile materials

Compatibility

Designed as a general-purpose replacement or supplemental bit for use with 1/4-28 threaded quick-change chuck systems. Meets NAS 965 Type B specification. Rated for low-tensile strength material applications.

Installation Notes

Threaded shank bits require a compatible 1/4-28 threaded chuck or quick-change adapter — do not force into a standard smooth-bore keyless chuck. Ensure the drill is fully powered off and trigger is locked before changing bits. Secure the shank fully to the specified thread engagement depth before applying cutting load. Wear appropriate eye protection when drilling; clear chips from the flutes regularly to prevent binding.