Dormer A100 HSS Jobber Drill Bit 10.5 mm

Dormer A100 Metric HSS jobber drills are designed for general-purpose engineering tasks, offering good self-centering performance on a wide range of materials and suitable for both hand and machine use. Made from High-Speed Steel (HSS), they feature a 118° conventional point and a steam oxide finish that helps reduce built-up edge and improve lubricity. The drills are coated with damp heat treatment and include a clearly marked diameter due to a patented Silver ring while maintaining standard compatibility with drill chucks and metalworking machines. Key dimensions include a tip diameter of 10.50 mm, overall length of 133 mm, and a working length of 87 mm, with a shank diameter of 10.5 mm and a maximum drilling depth of 4xD. These drills are intended for drilling in steel and cast iron, with easy re-grinding possible and reliable self-centering performance across supported materials.

Features

• Tip diameter: 10.50 mm; length: 133 mm
• Working length: 87 mm; shank diameter: 10.5 mm
• Point angle: 118°; max depth: 4×D
• Material: HSS; coating: damp heat treatment
• Self-centering; compatible with standard chucks and tools

Usage and specifications

Suitable for drilling in steel and cast iron, these drills can be used in machines or hand-held applications. Insert into a compatible drill chuck or machine tool, ensure it is securely tightened, and use appropriate cutting fluid to reduce heat and improve performance. The drill is designed for general-purpose engineering applications and supports a wide range of materials with easy re-grinding options and clear diameter marking via the Silver ring.

Securely tighten the drill in the chuck and use appropriate cutting fluid.