How do I change the batteries?
How do I get this tool to stick to the wall?
As a mason who works on large job sites, I have dropped a level and now the level no longer work properly.
I just used the large hole saw to drill through my door and it worked great. Now I have to use the small hole saw and the mandrel-pilot bit will not fit into it. What should I do?
I just took this tool out of the package and put the batteries in. I have very faint lines showing. Does this tool need to be returned?
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I drilled the large hole in my door and have also drilled the small hole, but the small hole does not go all the way back to the large hole. What can I do?
I can’t get both bubbles to line up at the same time, can you help me?
I am crosscutting oak veneer plywood on a table saw, and the veneer is chipping on the backside. What type of blade would you recommend to cleanly cut across plywood?

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I plan on using my hole saw to cut into iron. What RPM should I use for best results?

Support

04 January 2023 20:33
Updated

Trying to cut metal too fast will overheat the material being cut, which 'heat-hardens' the work and causes the cutting blade to work harder and wear out more quickly. To answer your question we would need to know what size hole saw you are using. Every hole size requires a different RPM for different types of materials. IRWIN always details the optimum drill RPM on each hole saw package. Before you use your hole saw to cut iron, please refer to the manufacturer recommended RPM for the appropriate hole size.

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