Drill bit Glob HSS twist drill 8 x 55 mm with Weldon 19 mm shank

Glob HSS twist drill 8 x 55 mm with a 19 mm Weldon shank is a high-speed steel drill designed for reliable metalworking and general workshop drilling. The 8 mm cutting diameter combined with a 55 mm overall length provides the reach needed for medium-depth holes, while the HSS material ensures wear resistance and heat tolerance during higher-speed machining. The 19 mm Weldon shank offers secure clamping in Weldon-compatible chucks and tool holders, reducing slippage and runout for more consistent hole quality.

Advantages

This HSS twist drill delivers a balance of hardness and toughness suitable for drilling a wide range of ferrous and non-ferrous metals. The Weldon shank design enables strong, positive holding in set-screw toolholders and milling arbors, improving stability under side loads and during repetitive operations. The 55 mm length gives added reach without excessive flex, and the standard 8 mm diameter matches common fastening and clearance hole sizes used in fabrication and assembly.

Suitable for

• Drilling through steel, cast iron, aluminium and other metals
• Workshop and industrial drilling with Weldon-compatible holders
• Producing clearance and pilot holes for bolts and fasteners
• Use in bench drills, radial drills and portable machines when properly clamped

Key specifications

• Cutting diameter: 8 mm
• Overall length: 55 mm
• Material: High-speed steel (HSS)
• Shank type: Weldon shank, 19 mm diameter
• Point type: Twist drill geometry for general-purpose drilling

How to use

Secure the drill by its Weldon shank in a compatible set-screw holder or chuck and ensure the clamping surface is clean and free of burrs. Choose appropriate spindle speed and feed for the material being drilled—lower speeds for harder alloys, higher speeds for softer metals—while applying steady, even pressure. Use cutting fluid or coolant when drilling steel and other ferrous materials to reduce heat, extend tool life and improve chip evacuation. Retract periodically on deeper holes to clear chips and prevent clogging.

Usage recommendations

Inspect the drill for wear or damage before use. Maintain correct speeds and feeds, use suitable coolant for metal drilling, and ensure the Weldon shank is fully clamped to minimize runout. Replace or regrind the drill when edge wear or chipping affects hole quality.