Speed and Feed question

Jun 12, 2007 3 Replies
G

I've got a project that requires the slotting of 304 SS tubing. The wall thickness is.049", the width of the slot is .072", the depth of the slot is .310" and I need a slot on both ends of the tube to be in the same plane. We've done the prototyping and first piece parts using a slotting saw and a Bridgeport(with a saw arbor and appropriate saw blade) making the first slot and then flipping the piece end for end and then making the second slot. I now need to design a machine to make both slots at one time. I have most of the design work done and I'm just trying to work out the speed (SFM) for the blades. I plan on using a 72 tooth,



3"diameter blade with a 1" arbor. Any body got any suggestions?

Greg


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N

50 FPM is the norm for cutting T304 with HSS. You may be able to push that some in your case, where each tooth will only be cutting a small percentage of a rev. 72 tooth (about 1/8" tooth-tooth on a 3" blade) sounds way too coarse for .049 material. If you're having trouble finding a finer pitch, these folks can help...

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They reground a half dozen saws to a special thickness for me for only a couple dollars apiece more than a stock blade from MSC. They may also be able to give speed/feed recommendations.

Ned Simmons

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G

Ned and Karl Thanks for your replies. I will call both places in the AM. Before I posted, I was thinking the 200 SFM would prolly be a good starting point and according to RobbJack I was right on the button. Now all I have to do is find a motor the runs at 257 RPM and all will be right with the world . Thanks for your help.

Greg

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