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| Brand Name: | XRTOOLS |
| Model Number: | 20 |
| MOQ: | 500PCS |
| Price: | $0.35-22/PCS |
| Delivery Time: | 30-35 days |
| Payment Terms: | L/C, T/T, D/P, Western Union, MoneyGram |
Engineered for industrial-grade performance, our 20mm M42 Cobalt Bi-Metal Hole Saw is the professional’s choice for precision boring. By integrating 8% Cobalt into the high-speed steel (HSS) teeth, this hole saw delivers exceptional "red-hardness," allowing it to cut through tough materials that would destroy standard bi-metal saws.
Whether you are drilling through thick 304 stainless steel sheets, aluminum, or structural steel, the M42 metallurgy ensures a cooler cut and a significantly longer tool life. The specialized variable pitch tooth design minimizes vibration and leaves a clean, burr-free finish.
| Feature | Specification Details | Industrial Advantage |
| Diameter | 20mm (approx. 25/32") | Perfect for M20 conduit and cable glands |
| Blade Material | HSS M42 (8% Cobalt) | Superior wear resistance in hard metals |
| Body Material | Alloy Spring Steel | High flexibility to prevent shattering |
| Teeth Design | 4/6 Variable Pitch TPI | Faster chip removal and smoother action |
| Cutting Depth | 38mm (1-1/2") | Deep enough for thick joists and panels |
| Arbor Required | Standard 1/2" or 3/8" Hex | Universal compatibility |
8% Cobalt (M42) Edge: * The Advantage: Cobalt creates a high resistance to heat and abrasion. This allows the 20mm saw to maintain its sharp edge even when the friction of metal-on-metal drilling generates extreme temperatures.
Variable Pitch Tooth Geometry:
The Advantage: The irregular spacing of the teeth (4/6 TPI) prevents the saw from finding a harmonic vibration frequency. This results in a much quieter, smoother cut and reduces the risk of the tool "grabbing" or stalling in the material.
Electron-Beam Laser Welding: * The Advantage: The HSS M42 cutting edge is permanently fused to the alloy steel body using vacuum electron-beam welding. This creates a flexible bond that allows the saw to absorb the shock of hitting a knot in wood or a hard spot in metal without the teeth stripping off.
Dual Side Slots (Ejection Slots):
The Advantage: Strategic slots on the side of the saw body facilitate rapid chip evacuation and provide easy access for a screwdriver to pop out the slug (core) after the cut is finished.
Electrical Installation: Perfect for creating entry points for M20 cable glands and conduit in metal junction boxes.
Stainless Steel Fabrication: Ideal for cutting holes in stainless steel countertops, sinks, and industrial control panels.
Plumbing: Drilling through copper, brass, and plastic pipes.
DIY & Construction: Creating clean holes in hardwood, plywood, and PVC for furniture or cable management.
Q: Can this 20mm saw cut through 3mm thick Stainless Steel?
A: Yes. Because of the M42 (8% Cobalt) content, it is designed for exactly this purpose. However, you must use a slow RPM and a high-quality cutting lubricant to prevent the material from work-hardening.
Q: What type of drill do I need?
A: A standard handheld power drill or a drill press is sufficient. For 20mm, a 10mm (3/8") chuck is the minimum size required for most standard arbors.
Q: How do I get the wood or metal core out of the saw?
A: Use the side ejection slots. Simply insert a flathead screwdriver into the slot and push the core out. The 20mm size is small, so the core can sometimes be snug—the slots make removal much faster.
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