Hole Saw Abraboro Bimetal HSS‑Co 79 x 38 mm, model AB30079000

Abraboro bimetal hole saw HSS‑Co 79 x 38 mm is a precision cutting tool intended for creating clean circular openings with a nominal diameter of 79 mm and a cutting depth of 38 mm. Constructed from high‑speed steel with added cobalt (HSS‑Co), this hole saw offers increased wear resistance and better heat tolerance compared with standard HSS, making it suitable for repetitive cutting tasks and demanding work environments. The cutters are designed to be fitted to a compatible arbor and drill; when used with the correct equipment and cutting parameters it enables efficient holemaking in a variety of materials.

Advantages

The bimetal construction combines a flexible body with hardened cutting teeth, providing a balance between toughness and cutting performance. Cobalt alloying increases red‑hardness, improving tool life at elevated temperatures and under continuous load. The 79 mm diameter and 38 mm depth permit through‑holes and deep cuts in sheet metal and thin plate applications. Teeth geometry and bimetal brazing reduce vibration and help maintain a consistent cut quality over multiple holes.

Suitable for

• Cutting holes in steel and stainless steel sheets (with appropriate speed and coolant)
• Creating openings in non‑ferrous metals such as aluminium and copper
• HVAC ductwork and ventilation installation tasks
• Electrical panel and conduit entries where precise circular holes are required
• Plumbing installations through metal pipes and brackets

Key specifications

• Cutting diameter: 79 mm
• Cutting depth: 38 mm
• Material: high‑speed steel with cobalt (HSS‑Co)
• Construction: bimetal (high‑speed steel teeth bonded to a flexible backing)
• Typical application materials: ferrous and non‑ferrous metals, thin plates, construction materials when used with suitable arbor

How to use

Install the hole saw on a compatible arbor and secure it in the drill chuck according to the arbor manufacturer’s instructions. Mark the centre point of the hole and, where possible, use a pilot drill to guide the arbor for precise alignment. Select an appropriate drilling speed and apply steady feed pressure; for steel and stainless steel use reduced speeds and apply cutting fluid or coolant to lower cutting temperature and extend tool life. Periodically retract the hole saw to clear chips and allow cooling. After completing the cut, remove burrs and deburr the edge as needed.

Usage recommendations

For prolonged tool life and consistent performance, use the hole saw with a robust arbor that provides stable centring and supports chip evacuation; choose drill speeds and cutting fluids appropriate to the material being cut. Replace the hole saw if tooth wear or damage compromises cut quality.