Guhring 9002050007700 Jobber Drill Bit 0.77mm Hss

Product Description

The GUHRING 9002050007700 is a jobber length twist drill bit designed for precision drilling in metal and cast iron applications. Built from M2 high speed steel with a bright uncoated finish, this bit features a 118-degree standard point angle and a right-hand spiral flute configuration. It measures 0.77 mm in diameter with an overall length of 30 mm and a flute length of 10 mm. The straight-cylindrical shank matches the bit diameter at 0.77 mm, making it compatible with standard drill chucks. This bit is sized for fine-detail work and is typically used by machinists, tool and die technicians, and precision fabricators.

This drill bit is suited for general-purpose drilling in steel and cast iron workpieces, consistent with primary workpiece material codes P and K. The DIN 338 specification and Series 205 designation place it within a well-established family of jobber length drills used in production machining, maintenance, and repair environments. The 5xD flute-to-diameter ratio supports chip evacuation in short-depth applications. Maximum drilling depth is 8.85 mm. Sold individually, this bit is appropriate for low-volume precision tasks or as a replacement for worn tooling in a standard drill set.

Key Features

• M2 high speed steel construction for durability in steel and cast iron drilling
• 118-degree standard point angle with web-thinned, tapered web configuration for reduced entry force
• Right-hand cut with regular spiral flute for efficient chip removal
• Straight-cylindrical shank at 0.77 mm for secure chuck engagement
• Conforms to DIN 338 standard for consistent dimensional accuracy
• Diameter tolerance of +0.000 to -0.012 mm for close-tolerance hole production

Compatibility

Designed as a general-purpose jobber length drill bit per DIN 338 for use in standard drill chucks and CNC or manual drilling equipment suited for small-diameter tooling. Compatible with steel and cast iron workpieces as indicated by material codes P and K.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tool operators. Ensure the drill chuck is fully tightened and the workpiece is securely fixtured before operation. Disconnect or power down the machine before changing tooling. Do not exceed the maximum drilling depth of 8.85 mm without retracting to clear chips.