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Cattle Boards
Trucks, Tractors & Machinery
whats a good speed for drilling metal?
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<blockquote data-quote="eric" data-source="post: 276635" data-attributes="member: 7"><p>If this is a problem you have frequently, then you might want to invest in a (less than $100) Kool-Mist system. It has a magnetic air nozzle and mixes oil and water together and sprays directly on your drill bit. If you use the drill press often enough, it will pay for itself. Not to mention it is alot cleaner than oil all over the place. It actually uses a water soluable coolant mixture. We just run the same coolant mixture we use in our lathes in the tank, and it is alot cleaner and the drill bits seem to last forever. </p><p></p><p>By the way, 620 rpm for a 5/16" bit isn't too fast. Grade 5 bolts are fairly soft, so I would look into making sure your bit is sharp and ground correctly. Good luck!</p></blockquote><p></p>
[QUOTE="eric, post: 276635, member: 7"] If this is a problem you have frequently, then you might want to invest in a (less than $100) Kool-Mist system. It has a magnetic air nozzle and mixes oil and water together and sprays directly on your drill bit. If you use the drill press often enough, it will pay for itself. Not to mention it is alot cleaner than oil all over the place. It actually uses a water soluable coolant mixture. We just run the same coolant mixture we use in our lathes in the tank, and it is alot cleaner and the drill bits seem to last forever. By the way, 620 rpm for a 5/16" bit isn't too fast. Grade 5 bolts are fairly soft, so I would look into making sure your bit is sharp and ground correctly. Good luck! [/QUOTE]
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whats a good speed for drilling metal?
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