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Thread: Parting the easy way
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22nd Nov 2020, 02:47 PM #1Most Valued Member
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Parting the easy way
There has been a bit of chatter in here recently about parting, this addition to your parting tool will simplify parting on pretty much any problem lathe, it stops HSS and carbide digging in and chipping and parting can be performed a considerable distance from the chuck without tailstock support.
Some pics below and a short vid here https://www.youtube.com/watch?v=hsBhJXjB8fA
The 1st parting block was a bought one and i just welded some lugs onto it then fitted a blade and linished it flat for the support bracket to sit flush against. It worked pretty good so I made one to hold a carbide blade.
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22nd Nov 2020, 07:35 PM #2
Hi John, Guys,
Neat idea, using the work piece as a steady rest ! Very effectively stopping dig in.Best Regards:
Baron J.
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22nd Nov 2020, 08:45 PM #3
Great idea, I might give it a try.
I wonder if 1- 2 bearing wheels would be better than a block to not mark any surface being parted off.Using Tapatalk
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22nd Nov 2020, 09:07 PM #4Most Valued Member
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22nd Nov 2020, 09:37 PM #5Most Valued Member
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22nd Nov 2020, 09:48 PM #6Most Valued Member
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Hi Dave, yeah maybe.... but then you would need some sort of slide for the brgs to attach to so the tool could be advanced into the job.
The brass slide was a simple choice, i did throw around other ideas before making the one for the carbide insert blade but decided i liked the simplicity of the bronze slide. It sits on the stock not the part and seems to do the job.
If you can come up with better ideas that would be gr8, these 2 were what i made a while ago and always thought of them as unfinished prototypes....
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22nd Nov 2020, 09:49 PM #7Most Valued Member
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22nd Nov 2020, 09:52 PM #8
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23rd Nov 2020, 07:42 PM #9Diamond Member
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I don't understand what this does, apart from steading the work piece in one direction.
Why not just use a steady, which would do it in 3 directions?
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23rd Nov 2020, 07:49 PM #10Most Valued Member
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Much quicker to setup than a steady. And you don't need to steady the workpiece in three directions anyway. The workpiece wants to move up when it encounters the parting blade.
Chris
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23rd Nov 2020, 07:59 PM #11Diamond Member
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Mostly.
On a bad day in my youth, I made the job bend up on top of the blade.
Bounce, wobble, bend.
I always thought two hacksaw blades, in a custom frame, was the foolproof solution.
One on top, one underneath, tapered toward each other.
You slide it from the large gap toward the small.
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23rd Nov 2020, 08:10 PM #12Most Valued Member
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Excellent idea that would be an absolute game changer where thin shafts and/or smaller lathes were concerned.
Simple and effective.
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23rd Nov 2020, 11:45 PM #13Most Valued Member
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Hi Karl, I think they could be made larger if there was a requirement, the ones in this post will do 60mm diameter, the carbide one I use on my CL410, for example I can hang 300mm of 50mm dia stock out of the chuck and work my way down the length slicing off 1/4" spacers, using a centre to support while parting is a bit hairy and slow.
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25th Nov 2020, 04:56 PM #14
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26th Nov 2020, 11:48 AM #15Member
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Parting Off Tool Support
Great idea with the support above the work.
This method works well for me on a basic hss tool...
011.jpg 012.jpg Definitely helps prevent the tool nodding downwards.
I haven't seen one of those split tools shown in another post for years. Are they still available anywhere?
Just yesterday I received the more up to date inserted carbide-tip tool that I'd ordered last week. A quick test on some aluminium round showed a remarkable performance. Un-necessary to use the jack screw thingy of course.
H614
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