Hole saw Abraboro OTWORNICA BIM 54 mm — cobalt 8% (AB30054000)

Abraboro OTWORNICA BIM 54 mm — cobalt 8% is a bi-metal hole saw designed for creating clean circular holes with a 54 mm diameter in metals and other hard materials. The tool combines high-speed steel cutting teeth with a flexible backing to balance cutting performance and toughness. The 8% cobalt alloy increases heat resistance and edge life compared with standard high-speed steels, making the saw suitable for repetitive drilling in demanding environments such as metal workshops and on-site installations.

Advantages

The bi-metal construction delivers a combination of hardness and flexibility that reduces tooth breakage and extends service life under higher temperatures. A 54 mm cutting diameter and uniform tooth geometry provide consistent hole quality with reduced burr formation. The 8% cobalt content improves wear resistance and maintains cutting performance when drilling into stainless steel, alloyed steels and other tougher materials. The hole saw is compatible with standard arbors and can be used with hand-held drills and drill presses, offering versatility for different workflows.

Suitable for

• Drilling holes in carbon steel and stainless steel
• Creating circular access points in metal enclosures and panels
• Plumbing and heating installations requiring pipe or conduit openings
• Electrical installations for junction boxes, switches and outlets
• Workshop and maintenance tasks requiring reliable metal cutting

Key specifications

• Cutting diameter: 54 mm
• Material system: bi-metal (high-speed steel teeth with flexible backing)
• Alloying: 8% cobalt in the cutting edge for improved heat and wear resistance
• Intended materials: steels, stainless steels and other hard metals; also suitable for some non-ferrous materials
• Compatibility: suitable for use with standard hole saw arbors, hand-held drills and drill presses

How to use

Secure the hole saw to a compatible arbor and attach it to an appropriate drill or drill press. Mark the center of the hole and, if necessary, start with a pilot drill to ensure accurate positioning. Use steady, moderate feed pressure and maintain appropriate cutting speed for the material being drilled; reduce speed when cutting stainless or hardened steels. Apply a suitable cutting lubricant or coolant when drilling metals to reduce heat build-up and prolong tool life. After completing the cut, clear chips from the saw and inspect the edge before further use.

Usage recommendations

For best results when drilling stainless or alloyed steels, use lower rotational speeds and apply cutting fluid. Avoid excessive side loading and allow the saw to cool between extended cuts to preserve tooth geometry and maximize service life.