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View Full Version : 4140 Prehard, RC34: bandsaw cut or no?



Arthur.Marks
09-04-2014, 10:44 PM
I know it can be turned, milled with HSS--though carbide is very much recommended. But can stock be cut to length on a horizontal bandsaw with a good bimetal blade? Just wondering as I don't have a true abrasive saw. I can butcher it to rough length with an abrasive disc in my die grinder, but the bandsaw would be far more accurate and efficient.

caveBob
09-04-2014, 10:46 PM
I've cut 4140PH no problem with a smaller table-mounted portaband, bet you'll do fine.

PStechPaul
09-04-2014, 11:14 PM
I don't have experience with the pre-hard, but I'd first try cutting it at least part way with a hacksaw, and see if the blade stays sharp or dulls quickly. Much cheaper than a bandsaw blade. And you can just finish the cut by hand and get an upper body workout. :rolleyes:

lakeside53
09-05-2014, 12:28 AM
Bandsaw is fine. Slow speed, and don't be too wimpy with feed or it will work harden. Use coolant if you can.

SGW
09-05-2014, 06:26 AM
Should be no problem.

browne92
09-05-2014, 09:41 AM
Is pre-hard the same as heat treated? I've cut 4140cfht on my band saw several times no problem.

Toolguy
09-05-2014, 11:00 AM
I've done it lots of times. A good bimetal blade will walk right through it. Rc 32-34 isn't very hard. Pay attention to posts above about slow blade speed and coolant if possible. It will cut OK dry but coolant is better.

cuemaker
09-05-2014, 11:01 AM
Bandsaw is fine. Slow speed, and don't be too wimpy with feed or it will work harden. Use coolant if you can.

This is the correct answer. My shop cuts this all day long. Normal blades work also. I also cut this stuff with my portaband at home when since i get the material for free......

Arthur.Marks
09-05-2014, 02:08 PM
Thanks for the info, everyone! Very helpful!