Guhring 9005520035700 Screw Machine Drill Bit Size 28

Product Description

The GUHRING 9005520035700 is a stub-length (screw machine length) twist drill bit designed for high-throughput metal drilling in production and maintenance environments. Built from high-speed steel (HSS) with a bright uncoated finish, it carries a 130-degree cone-relief point that reduces thrust and improves chip ejection on entry. The parabolic flute geometry with web thinning promotes fast chip evacuation and helps prevent clogging in deep-feed applications. At 0.1406 inches in diameter (wire size 28, fractional equivalent 9/64 inch) with a 2-1/16 inch overall length, this bit is sized for close-tolerance hole work where a shorter flute column provides added rigidity.

This drill bit is engineered for cutting steel, aluminum, and other non-ferrous materials. The stub-length design makes it well suited for drill press work, CNC machining centers, and screw machine operations where reduced overhang improves accuracy and minimizes deflection. The parallel web configuration and 3xD flute-to-diameter ratio support consistent chip flow at moderate to aggressive feed rates. Licensed machinists, tool-and-die technicians, and production line maintenance personnel are the typical end users.

Key Features

• 130-degree cone-relief point reduces entry thrust and self-centers on flat or curved stock
• Parabolic fast-spiral flutes with web thinning for efficient chip evacuation
• Stub length (screw machine length) provides greater rigidity and reduced deflection versus jobber-length bits
• Straight cylindrical shank fits standard drill chucks and collets without modification
• Bright uncoated HSS finish suits general-purpose cutting in steel and non-ferrous alloys
• Manufactured to DIN 1897 specification for consistent dimensional tolerances

Compatibility

Designed as an OEM-style screw machine length drill bit for use in drill presses, CNC machining centers, and screw machine setups requiring a straight-shank HSS stub drill in wire size 28 (0.1406 inch diameter).

Installation Notes

Installation is performed by machinists or tool-and-die technicians. Secure the straight shank fully in a drill chuck or collet before operation and verify runout before beginning production cuts. Disconnect or lock out all machine power before changing or inspecting tooling per standard machine guarding practices. Do not exceed the maximum recommended drilling depth of 0.577 inches without retracting to clear chips.