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Thread: Starting a Stent tool grinder.
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29th Apr 2014, 09:45 AM #1
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Starting a Stent tool grinder.
Around two years ago Michael G sent me these stent casting, he had already machined the dovetails. So last weekend we finally made a start on it, I have machined most of the spindle and used my little atlas shaper for the first time in vein to machine the spindle casting.
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Andre
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29th Apr 2014, 10:31 AM #2
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29th Apr 2014, 10:50 AM #3
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Hi Andre,
Good to see some progress, but no 40tpi threads
Its interesting to see you get the pattern of diagonal lines in the finish from the shaper too. I guess its the bull gear teeth leaving their mark?
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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29th Apr 2014, 11:02 PM #4
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Yeah I substituted the 7/16" 40 tpi model engineers for an m12 fine pitch it should work. As for the shaper I don't have any idea
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Andre
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26th Jan 2015, 11:50 PM #5
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well I pulled the project out of hiatuses, As I have the CVA almost wired up I had a go at cutting the tee slots for the table.They came out okay put I'm not 100% happy but it will do. They are 10 mm tee slots I roughed them out with a nice new 6mm cutter and hacked away with a blunt 10 mm till it was done learnt a lesson in climb vs conventional milling today
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Andre
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27th Jan 2015, 12:02 AM #6
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Where was the climb milling in the tee slot cutting?
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27th Jan 2015, 06:33 AM #7
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When cutting the initial slot I climb-milled as that didnt work out too well.
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Andre
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27th Jan 2015, 08:15 AM #8
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Still cant see where the climb milling comes into it when cutting a slot.
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27th Jan 2015, 09:03 AM #9
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Maybe he was using an undersized endmill requiring more than one pass?
Originally Posted by pipeclay
Nice work Andre. The finish on your spindle looks great too!
Ueee, so you reckon those diagonal marks (your eyes are good!) are from the bull gear?
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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27th Jan 2015, 09:16 AM #10
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Well I don't know boys I might have my terms wrong but when I fed the tee slot cutter in it pulled in and shook the table going one direction but not going the other direction so may be the mill.
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Andre
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27th Jan 2015, 12:10 PM #11
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I would think that there is something either not fitting correctly or your gib may be to loose or you didn't remove backlash.
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27th Jan 2015, 12:12 PM #12
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That could be the case but wasn't mentioned. Originally Posted by simonl
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27th Jan 2015, 01:00 PM #13
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Well now you say this Pipeclay it was most likely was me not taking out the backlash as the problems only ensued in the first 1inch or two of cutting. I only thought climb milling as I was traversing in the direction you would go if using an endmill climbmilling. Does the direction of milling make no difference when cutting with both sides of a cutter ? Originally Posted by pipeclay
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Andre
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27th Jan 2015, 01:33 PM #14
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Makes no difference when cutting a slot as one side would be conventional and the opposite climbing.
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27th Jan 2015, 01:52 PM #15
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Cheers pipeclay a wealth of knowledge as usual.
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Andre
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