Proper Rpm For A Plain Slitting Cutter

Guys my machine took way to much time to cut through the steel at 150 RPM, in five minutes i didn't make but a five inch long cut. The cutter was jamming every-time I tried to add a bit more force. I readjusted the belt tightness a couple times and it still jammed. I was using blade lube too. I've given up, I have sheet metal I going to bend.
 
tackit said:
Guys my machine took way to much time to cut through the steel at 150 RPM, in five minutes i didn't make but a five inch long cut. The cutter was jamming every-time I tried to add a bit more force. I readjusted the belt tightness a couple times and it still jammed. I was using blade lube too. I've given up, I have sheet metal I going to bend.
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Was it loud with an annoying thrumming?

What feed rates did you try, if feeding by hand this will cause problems unless you are very experienced. I would think .006 or so per revolution of the saw would be a good starting point therefore 150 Revolutions Per Minute / .006 is roughly 1" IPM therefore a 5" long cut should take 5 minutes.
 
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Wreck™Wreck said:
Was it loud with an annoying thrumming?

What feed rates did you try, if feeding by hand this will cause problems unless you are very experienced. I would think .006 or so per revolution of the saw would be a good starting point therefore 150 Revolutions Per Minute / .006 is roughly 1" IPM therefore a 5" long cut should take 5 minutes.
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Wreck it wasn't loud at all... I kept lubing the cutter and cranking the table at the speed the cutter would take....seemed like forever to make five inches. I have to find a better way, it's to slow.

I just talked to the SIL and told him when the AC/furnace man gets here I'm going to ask him to make a tray for me.... he's a tin knocker by trade and does tin work in his garage.
 
tackit said:
Wreck it wasn't loud at all... I kept lubing the cutter and cranking the table at the speed the cutter would take....seemed like forever to make five inches. I have to find a better way, it's to slow.

I just talked to the SIL and told him when the AC/furnace man gets here I'm going to ask him to make a tray for me.... he's a tin knocker by trade and does tin work in his garage.
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Sometimes machining operations take a good deal of time, I do a recurring lathe job where the roughing lathe work, OD turn for a steady rest takes nearly 1 hour per pass, the part is 65" long, setup time will kill you.
 
Unless you are needing both halves, just put in vise and use an end mill. Make a wood spacer to put in the middle for when you turn it around. Or saw it then machine the top edge to smooth/even it out
 
tackit said:
Guys my machine took way to much time to cut through the steel at 150 RPM, in five minutes i didn't make but a five inch long cut. The cutter was jamming every-time I tried to add a bit more force. I readjusted the belt tightness a couple times and it still jammed. I was using blade lube too. I've given up, I have sheet metal I going to bend.
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How are you holding the work? You don't want to clamp in such a way that the slit will tend to close. You could also try pressing a wedge into the slit behind the saw.
 
Use a carborundum cutoff wheel ! It would go thru it like butter ( if the sparks mean nothing )
 
Guys I have shelved the tray project for now , I think I'll buy some 16 ga and bend a tray on homemade bender. The 90 degree bend is 16 gauge steel.

Bender A.jpg Bender B.jpg Bender C.jpg Bender D.jpg
 
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