Hey all, I’m in the market for a new drill press that will get heavy use with Forstner bits and hole saws with recommended rpms of 250, 300, and 500.
My drill press now goes down to 740 and most drills I’m looking at only go down to 540 or so. Other quality presses that go down to 220 are a few hundred dollars more.
Is it worth the more money to have the right rpms for the bits?
Thanks!
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Replies
In a word, yes.
The slower speeds help control heat build up. You will ruin fewer bits and burn less wood. The outside edge of a large bit is travelling really fast. You can calculate circumference by my multiplying 2 x pi x radius of the bit. So the edge of a 2.25" bit will travel 5,822" at 740 rpm versus 2,360" at 300. Twice the friction = twice the heat. Buy the right tool. In the long run you will save on sharpening costs and burnt wood and lousy cuts.
I agree with Beasley 100%. At those bit sizes and speeds, heat/scorching/smoke will be a real problem. And slowing the feed rate won't solve the problem.
Another agreement here. I have passed on otherwise acceptable drill presses simply because they would not go slow enough. This is an area that indicates the machine is not intended for woodworking. Since you mentioned that you plan to spin large Forstner bit and circle cutters this already essential function would be even more essential for you in my humble opinion.
I think you said it all with the words 'Heavy use' - spend the $$ on a good machine.
Thanks guys!
I really appreciate the responses and input—was stressing about this one so all the info helped a lot. I took the plunge and picked up a JET 17in press this weekend and I’m super excited to get this thing goin
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Review it please...
:-)
Nice. The 716300 is one that I could be tempted with. Congrats!
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