Drill bit Abraboro HSS-G ground metal 11.0→10 mm

Abraboro HSS-G ground metal drill bit stepped from 11.0 mm to 10.0 mm is a precision-made cutting tool for creating stepped holes in steel and common metal alloys. Made from high-speed steel (HSS-G) with a ground flute, this drill bit offers improved concentricity and a sharper cutting edge compared with unground variants. It is intended for both workshop and industrial applications and can be used in hand-held drills as well as machine tools where a controlled, two-diameter hole is required.

Advantages

The ground flute and HSS-G material deliver consistent cutting performance and good heat resistance for metal drilling. The stepped geometry enables drilling two diameters in one operation, reducing setup time and improving alignment between the larger and smaller sections of the hole. Ground finishing improves roundness and stability during rotation, which reduces runout and promotes longer tool life under typical operating conditions.

Suitable for

• Drilling stepped holes in mild steel and common metal alloys
• Workshop and maintenance tasks requiring two-diameter holes
• Use in hand-held drills and machine drilling setups

Key specifications

• Material: high-speed steel (HSS-G)
• Finish: ground flute for improved concentricity
• Stepped diameters: 11.0 mm → 10.0 mm
• Intended use: metal drilling (steels and common alloys)
• Geometry: stepped drill design for sequential diameters in one pass

How to use

Secure the workpiece firmly using a vise or suitable clamping method to prevent movement. Select an appropriate cutting speed and feed for the specific steel or alloy being drilled and use cutting fluid to reduce heat and prolong tool life. Start drilling at low speed to establish the hole and then apply steady pressure until both diameters are formed. Clear chips frequently and avoid excessive axial force that could cause bit deflection or breakage.

Usage recommendations

Use appropriate cutting fluid and moderate speeds when drilling harder steels; for softer metals, slower feed and reduced lubrication may be acceptable to maintain hole quality. Inspect the drill periodically for wear and replace when cutting performance degrades to ensure consistent stepped-hole dimensions.