RICHELIEU
RICHELIEU 961991 70 mm Bi-Metal Hole Saw with Mandrel and Pilot
Cuts metal, plastic and wood with a 70 mm bi-metal blade that includes a mandrel and pilot drill for immediate use
- Bi-metal construction with M3 high-speed steel teeth for strength and consistent hardness
- 4/6 variable tooth pitch cuts metal, plastic and wood efficiently
- EZE slot enables quick plug removal on blades 45 mm and larger
- Includes screw-in mandrel and pilot drill for immediate use
- Heavy-duty backing plate adds rigidity for stable cutting
70 mm Bi-Metal Hole Saw
This RICHELIEU 961991 hole saw cuts clean 70 mm openings in metal, plastic and wood. It ships with a screw-in mandrel and pilot drill so the kit is ready for the drill press or hand drill. The bi-metal construction uses M3 high-speed steel teeth electron-beam welded to a heavy-duty backing plate for consistent hardness. It suits trade and DIY users who need a single large-diameter cutter.
Sustained cutting performance
The 4/6 variable tooth pitch reduces vibration and heat build-up during long cuts in thick sheet metal or hardwood. Electron-beam welding keeps the teeth secure even when the saw runs hot, and the rigid backing plate resists flex that would otherwise widen the kerf. Plug ejection through the EZE Slot works on this 70 mm diameter, preventing the core from jamming and slowing the feed. California Proposition 65 warnings apply to the materials used.
Installation and common issues
The screw-in mandrel threads directly into the saw body and the pilot drill centres the cut without a separate arbor. Users must ensure the mandrel is fully tightened before starting, otherwise the saw can walk or the pilot can snap. The EZE Slot eases plug removal but only works when the slot aligns with the workpiece thickness. The saw is not suited for masonry, glass or ceramic tile.
Highlights
- Bi-metal construction with M3 high-speed steel teeth for strength and consistent hardness
- 4/6 variable tooth pitch cuts metal, plastic and wood efficiently
- EZE slot enables quick plug removal on blades 45 mm and larger
- Includes screw-in mandrel and pilot drill for immediate use
- Heavy-duty backing plate adds rigidity for stable cutting
Specifications
| Brand | RICHELIEU |
|---|
Questions about this item
How much heat does the 70 mm bi-metal hole saw generate during extended cutting sessions?
The M3 high-speed steel teeth are heat-treated for consistent hardness, and the 4/6 variable tooth pitch promotes efficient cutting that reduces friction buildup in metal, plastic, and wood.
What power tool is required to operate the included mandrel and pilot drill?
The screw-in mandrel fits standard drill chucks, so any corded or cordless drill with a compatible chuck size will drive the hole saw.
Will the 70 mm hole saw work with an older drill that has a smaller chuck capacity?
The mandrel shank must fit the chuck; if the older drill's maximum chuck opening is smaller than the mandrel shank diameter, it will not secure properly.
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