Koopi 2 Inch BI-METAL Hole Saw with Arbor and Replacement Pilot Drill Bit, 51mm Dia Hole Cutter for Easily Drilling Wood, Plastic, Thin Metal
★Warm Tips - For longer saw life and lower operating cost
- Check that the arbor shank is securely inserted in the chuck on the drive unit.Tighten with chuck key.
- Cutting oil should be used when sawing metal sheet.The cutting pressure should, however, be high so that each tooth cuts deep.Paraffin can be used when sawing aluminum.
- Use the correct rotation speed!Too high or too low a speed will decrease the life of the cutting edge.
- If the hole saw vibrates during sawing, the teeth may become damaged and break.The result is often a rough, imperfect hole.
- Clear away chips and plugs frequently in order to prevent overheating.