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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Correct speed for a very thin slotting saw?
Hi group,
I'm over halfway done (I think) with the Skeleton Wall Clock by WR Smith. I need to slot a small brass block for the pendulum support. The support 'spring' is a length of .006 feeler stock. Smith describes how he did it...he used a .010 slotting saw (he didn't have a .006) and then closed up the slot to fit the thickness of the spring. I went ahead and bought a .006 slitting saw. It's obviously very thin and delicate, so I would like to know what speed I should run the saw at and what technique would work best for creating the slot. Thanks in advance. Nok |
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In article ,
Ned Simmons wrote: In article yd80d.10506$bE1.6543859 , says... Hi group, I'm over halfway done (I think) with the Skeleton Wall Clock by WR Smith. I need to slot a small brass block for the pendulum support. The support 'spring' is a length of .006 feeler stock. Smith describes how he did it...he used a .010 slotting saw (he didn't have a .006) and then closed up the slot to fit the thickness of the spring. I went ahead and bought a .006 slitting saw. It's obviously very thin and delicate, so I would like to know what speed I should run the saw at and what technique would work best for creating the slot. Thanks in advance. Nok Since this is only one slot and presumably you're in no rush, I'd be conservative and start around 50FPM and Which works out to about 64 RPM, assuming a 3" diameter slitting saw. perhaps 1/2 thousandth feed per tooth. If the location of the slot is critical you may want to make cheeks for your arbor to support the saw near its periphery. Agreed -- controlled by how deep the slot needs to be. Cutting brass -- you probably need no lubricant. But a flow of compressed air to keep the chips from flowing back into the area of cutting would be a good idea. If you've never used a saw this thin, they're tougher than you'd expect. Unless the slot is very deep this should be quite easy. And it if *is* very deep, make lots of passes. Do you have a horizontal spindle milling machine? That is what the slitting saws are made to be used in. However, you can get away with a vertical spindle mill and the right arbor for something this light a cut. Good Luck, DoN -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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