Guhring 9002050002500 Jobber Drill Bit Wire 87 Hss

Product Description

The GUHRING 9002050002500 is a jobber length drill bit designed for precise small-diameter drilling in metalworking and general fabrication applications. Built from M2 high speed steel with a bright uncoated finish, this bit holds a wire gauge size of 87, corresponding to a decimal diameter of 0.0098 inches (0.25 mm). The 118-degree standard point angle and web-thinned, tapered web configuration promote clean entry and reduced thrust in ferrous materials. With an overall length of 19 mm and a spiral flute length of 3 mm, this is a compact, purpose-built tool suited for HVAC, plumbing, and sheet-metal tradework requiring fine hole placement. Licensed machinists and tool-room technicians are the primary users.

This drill bit is rated for general-purpose use in cast iron and steel workpieces, consistent with its DIN 338 specification. The right-hand spiral flute promotes efficient chip evacuation during drilling. A straight-cylindrical shank with a diameter of 0.25 mm and shank length of 16 mm allows secure seating in standard keyless or keyed chucks. The 5xD flute-to-diameter ratio and regular spiral type make it a reliable choice for shallow-depth holes up to a maximum drilling depth of 0.104 inches (2.63 mm). It is sold individually but requires a minimum order quantity of 10 units per transaction.

Key Features

• Wire size 87 diameter: 0.0098 inches (0.25 mm) for fine, precise hole placement
• 118-degree standard point angle with web-thinned tapered web for reduced entry thrust
• M2 high speed steel construction for durability in steel and cast iron
• Right-hand cut with regular spiral flute for consistent chip removal
• Straight-cylindrical shank for compatibility with standard drill chucks
• Conforms to DIN 338 specification for consistent dimensional tolerances (h8)

Compatibility

Designed as a general-purpose jobber length drill bit per DIN 338, Series 205, suitable for use in standard drill chucks accepting a 0.25 mm straight-cylindrical shank. Rated for primary workpiece materials cast iron and steel.

Installation Notes

This bit should be installed by a qualified machinist or tradesperson using a drill press, CNC machine, or hand drill with a chuck sized for the 0.25 mm shank. Secure the shank fully in the chuck before operation to prevent runout at this small diameter. Given the fine diameter, apply minimal feed pressure to avoid bit breakage. No coolant-through capability is present; use an appropriate cutting fluid externally when drilling ferrous materials at sustained depths.