Guhring 9005490049500 Jobber Drill Bit 4.95mm Hss

Product Description

The GUHRING 9005490049500 is a jobber length twist drill bit designed for precision hole-making in a wide range of materials. Built from high speed steel with a bright uncoated finish, it features a parabolic flute geometry and a 130-degree point angle with cone relief and web thinning for improved chip evacuation and reduced thrust when entering the workpiece. The straight-cylindrical shank measures 4.95 mm in diameter, and the overall length is 86 mm (approximately 3.39 inches), with a flute length of 52 mm (approximately 2.05 inches). This bit is sized at 4.95 mm (0.1949 inches) and carries a diameter tolerance of h8, making it appropriate for close-tolerance drilling applications. It is suited for use by machinists, maintenance technicians, and fabricators working with manual or CNC drilling equipment.

This drill bit is primarily rated for aluminum and general-purpose non-ferrous and ferrous materials, covering primary workpiece material codes K, N, and P. The parabolic flute and 5xD flute-to-diameter ratio support chip clearance during deeper cuts, with a maximum drilling depth of 44.58 mm (approximately 1.755 inches). It is well suited for production drilling, maintenance repair, and tool-room applications where a standard DIN 338 jobber length geometry is specified. Sold individually, this bit fits standard drill chucks and collets accepting a 4.95 mm straight-cylindrical shank.

Key Features

• 4.95 mm (0.1949 inch) diameter with h8 tolerance for dimensional accuracy
• 130-degree point angle with cone relief and web thinning for reduced entry thrust
• Parabolic flute geometry promotes efficient chip evacuation at deeper cuts
• High speed steel construction rated for aluminum and general-purpose materials
• Straight-cylindrical shank fits standard drill chucks and collet systems
• Conforms to DIN 338 standard, Series 549

Compatibility

Designed as an OEM-style replacement or direct substitution for DIN 338 jobber length drill bits in the 4.00 mm to 5.00 mm diameter range, fitting any standard drill chuck or collet accepting a 4.95 mm straight-cylindrical shank.

Installation Notes

This drill bit should be installed by a qualified machinist or technician using a properly rated drill press, hand drill, or CNC drilling machine. Confirm the chuck or collet is rated for the 4.95 mm shank diameter and that the tool is fully secured before operation. Do not exceed the rated maximum drilling depth of 44.58 mm without retracting to clear chips. Follow applicable shop safety standards and manufacturer guidelines for cutting speed and feed rate based on workpiece material.