Home › Forums › Workshop Techniques › Rear mounting parting-off tools
Hi Guys,
Um, I don’t get Clive’s argument here. Yes, if you are pushing the tool in and the cutting forces pull the tool into the work then any backlash in the feedscrew & nut means that there is nothing resisting the pull. But equally if you are pulling the tool in and the cutting force is also pulling the tool in, then again any backlash also means that there is nothing to resist it.
Edited By meyrick griffith-jones on 16/10/2009 20:08:03
Hi Meyrick,
Hi Meyrick,
Hi Meyrick and sorry to the rest of you guys,
PS realized my mis-quote hence changes. Why can’t I edit when using Google Chrome, but I can when posting from Internet Explorer?
Edited By chris stephens on 17/10/2009 14:55:20
Edited By chris stephens on 17/10/2009 14:58:11
Fear not, I have used them on my Bantam which has a top speed of a mighty 800RPM! Oh and I used them dry.
the rear toolpost originally came to counter the split cap bearings found in most model engineers lathes in the early days the effect was to thrust the weight of cut into the casting and not against the bolts that held the bearing caps down. You will find that a keen tool with the correct rake and set ever so slightly below centre will part clearly all the time coolant is essential! i have just parted off two rings 4″ diameter with hand feed tonight in b.m.s for backplates on my traction engine hubs a little care goes a long way.
All very interesting, in the end its what works for you. Personally I am a Sandvik/Iscar person, front mounted on all sizes of lathe, when used with fluid the wet stuff stays on the top surface where it is wanted!
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