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Thread: More Asian tool disaster
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30th December 2013, 08:20 PM #1
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More Asian tool disaster
Hi
Today, I tried to mill a 3 mm slot into the SHERATON lathe back gear , where the broken tooth is . I plan on brazing in a new tooth blank, then shape the blank
Well, the Asian plunge type end mill lasted all of 1/2 a second , it was destroyed . The gear would be case hardened ? I may have to look for a 1/8" Dormer end mill ? Mike
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30th December 2013, 08:24 PM #2
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Use an angle grinder with a 1mm or 1.6mm cutoff disk. Not like you're needing the precision from an end mill at this stage. Then clean up the slot to size with a milling cutter if you need to.
PDW
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30th December 2013, 08:51 PM #3
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The back gear on the mars is cast iron, you sure yours is steel? you may have hit a hard spot or the cutter may be just really crap. Do you have a horizontal mill running yet? Perfect excuse to buy an 1/8" slitting saw and use that. Mind you since you are going to braze a New tooth in you may as well just use the angle grinder....
Ew1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
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30th December 2013, 10:35 PM #4
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carbide ?
I might try a carbide end mill on it next .
Originally Posted by Ueee
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31st December 2013, 08:59 AM #5
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I would go carbide
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31st December 2013, 10:41 AM #6
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I suppose the first few questions should be.
Was the tool for meant for cast/steel?
Was the spindle rotating the correct way?
Were you plunging or coming in from the side?
What RPM were you running?
What depth of cut were you attempting?
Were you feeding by hand?
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