Abraboro HSS-G AB91030104 is a high-speed steel countersink with a cutting range from 2.5 to 10.4 mm and an overall length of 50 mm. The tool is intended for creating chamfers and removing burrs from drilled holes in metal and a variety of other materials. Its HSS-G (high-speed steel, ground) construction provides wear resistance and stable cutting performance for workshop and industrial drilling and finishing tasks.
Advantages
The Abraboro HSS-G countersink offers precise and consistent chamfering across its 2.5–10.4 mm cutting range. Ground high-speed steel construction ensures good edge retention and resistance to heat during continuous use. The 50 mm overall length gives sufficient reach for standard workpieces while maintaining rigidity to minimise wobble and deflection. The tool is compatible with common drill chucks and machining setups, enabling quick changeover and reliable results in repeated operations.
Suitable for
- Chamfering drilled holes in steel, stainless steel, aluminium, and non-ferrous metals
- Deburring edges after drilling or machining
- Preparing countersunk screw seats and fastener holes
- General workshop and light industrial finishing tasks
When it may not be suitable
This countersink is designed primarily for metalworking and general-purpose finishing; it may be less effective on very hard exotic alloys or hardened steels where specialised carbide countersinks are recommended. It is also not intended for heavy material removal or milling operations — its geometry and material are optimised for chamfering and deburring, not for bulk cutting.
Key specifications
- Material: high-speed steel, ground (HSS-G)
- Cutting range (diameter): 2.5–10.4 mm
- Overall length: 50 mm
- Typical applications: chamfering, deburring, countersinking
- Compatibility: standard drill chucks and holders
How to use
Mount the Abraboro countersink securely in a compatible drill chuck or holder, ensuring concentric alignment. Select an appropriate spindle speed and feed rate for the workpiece material — lower speeds for harder metals and higher speeds for softer materials. Engage the tool with light, steady pressure to create the chamfer or remove burrs; avoid excessive force which can reduce tool life or cause chatter. For best finish, make a single smooth pass or two light passes rather than aggressive cutting. Apply cutting fluid when working with steels to reduce heat and extend tool life.
What to consider before purchase
- Verify the 2.5–10.4 mm cutting range matches the hole/countersink size you require
- Confirm compatibility with your drill chuck or holder and required reach (50 mm overall length)
- Consider material to be machined — HSS-G suits general metals; use carbide for very hard alloys
- Plan for appropriate cutting speeds and coolant use for optimal tool life
Usage recommendations
For precise chamfers and clean deburring, run the tool at speeds and feeds matched to the workpiece material, use light steady pressure, and employ cutting fluid on steels. Store the countersink in a protective sleeve or tool case to preserve the ground cutting edges between uses.
