Guhring 9055240034000 Cobalt Stub Drill Bit 0.1339 in

Product Description

The GUHRING 9055240034000 is a cobalt (M35) screw machine length drill bit designed for fast, accurate hole-making in a wide range of materials. Built to DIN 1897 standards, this stub-length bit measures 3.40 mm (0.1339 inches) in diameter with an overall length of 52.00 mm (2.047 inches) and a flute length of 20.00 mm (0.787 inches). The 118-degree four-facet split point reduces walking and thrust on entry, while the web-thinned, tapered web design promotes clean chip evacuation. The bright uncoated finish retains sharpness for general-purpose drilling in aluminum and similar materials. Right-hand spiral fluting follows a regular helix for consistent chip flow.

This drill bit is suited for screw machine and production drilling operations where a compact stub-length tool provides added rigidity and reduced deflection. The straight-cylindrical shank fits standard drill chucks without adapters. Primary workpiece material is aluminum, making it a practical choice for HVAC, plumbing, and electrical tradespeople drilling aluminum extrusions, sheet metal, and light structural components. Maximum drilling depth is 0.587 inches (14.90 mm), consistent with its 3xD flute-to-diameter ratio. Machinists, maintenance mechanics, and precision sheet-metal workers commonly reach for stub-length cobalt bits like this one when rigidity and positional accuracy matter more than drilling deep holes.

Key Features

• M35 cobalt tool material for improved heat resistance over standard HSS
• DIN 1897 stub-length geometry provides extra rigidity and reduced deflection
• 118-degree four-facet split point minimizes walking and reduces entry thrust
• Web-thinned tapered web promotes efficient chip evacuation
• Bright uncoated finish suitable for aluminum and non-ferrous workpiece materials
• Right-hand cut with regular spiral fluting for consistent performance in drill chucks

Compatibility

Designed as an OEM-style replacement or direct-use stub drill in any application requiring a 3.40 mm straight-cylindrical shank drill bit conforming to DIN 1897 specifications.

Installation Notes

This bit is installed by a machinist or tradesperson into a standard keyed or keyless drill chuck. Ensure the machine spindle is fully stopped and power is locked out before changing tooling. Confirm chuck capacity accommodates a 3.40 mm shank before seating. Do not exceed the rated maximum drilling depth of 0.587 inches per pass without retracting to clear chips.