Dormer A100 HSS Jobber Drill Bit Pack of 10 Pcs

This product is an A100 metric HSS jobber drill bit designed for general-purpose engineering tasks. Made from high-speed steel, it delivers dependable performance in steel and cast iron, with features that support both hand-held and machine drilling. The 2.9 mm diameter bit has a 61 mm overall length and a 33 mm cutting length, and it follows DIN 338, Type N specifications with an h8 tolerance. Its 118° conventional point enables easier re-grinding and effective self-centering across a wide range of materials. A steam oxide finish helps reduce built-up edge and improve lubricity, while a patented Silver ring provides a clear diameter marking for quick identification. Suitable for use in standard drill chucks, this bit is intended for general drilling applications and is compatible with typical speeds and feeds for steel and cast iron. The maximum drilling depth is four times the diameter, and the bit is appropriate for both manual and machine operations when used with the appropriate chuck and setup.

Features

• 2.9 mm diameter
• 61 mm OAL, 33 mm cutting
• 118° point and re-grindable
• HSS material, DIN 338 Type N
• Steam oxide finish, silver diameter mark
• Self-centering for various materials

Technical specifications

Material: High-Speed Steel (HSS). Diameter: 2.9 mm. Overall Length: 61 mm. Cutting Length: 33 mm. Point Angle: 118°. Shank: Cylindrical. Maximum Drilling Depth: 4xD. Standard: DIN 338, Type N. Tolerance: h8. Compatible with standard drill chucks for steel and cast iron drilling. Suitable for general drilling in steel and cast iron; speed and feed should be adjusted for optimal performance.

Safety: use appropriate eye protection and follow machine tool safety practices when drilling; ensure correct chuck installation and secure tightening.