Author Topic: Lathe chuck backstop for dummies  (Read 12058 times)

Offline Gerhard Olivier

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Lathe chuck backstop for dummies
« on: August 26, 2009, 05:40:56 PM »
Thanks to Bogs I now know whan a backstop does and how it works AND I WANT ONE

I dont have any morse taper blanks and my topslide travel is to short to make one without a lot of luck involved.

The other way mentioned looked like I would be able to manage

So I need a expanding collet that fits the wrong end of the headstock spindle.

25mm MS + lathe +
+Slitting saw

=

This has a 12.5mm bore right through and a low angle taper at one end


Then the Tapered locking bolt needs a Outer thread 12mm *1mm pitch and a inner 8m thread


And ready for parting ( taking it out to the garagde and cutting it with the hacksaw)  Parting noise wakes kids


The setup on a piece of 8m studding just needs a 12mm *1mm closing nut and some accesories - like delrin spacer to keep it from rattling and maybe a flat end for the material to rest on.



Enough for tonight

Hopefull more tomorrow

Gerhard
Guernsey
Channel Islands

Offline sbwhart

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Re: Lathe chuck backstop for dummies
« Reply #1 on: August 27, 2009, 01:16:43 AM »
Nice bit of machining Gearhard  :nrocks: is that a c4 indexer your using ?.

Looking forward to next installment  :thumbup:

Have fun

Stew
A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire

bogstandard

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Re: Lathe chuck backstop for dummies
« Reply #2 on: August 27, 2009, 02:48:03 AM »
Nice one Gerhard,

It should work just fine.


Bogs

Offline Gerhard Olivier

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Re: Lathe chuck backstop for dummies
« Reply #3 on: August 27, 2009, 04:42:03 AM »
HI all

Thanks Bogs , Stew and Im not sure what it is called its a spindex takes 5c collets and Im working it with a 5c to er35 adapter.I got it cheap at the mod eng show.

Just need a little knurling and some small bits then I can start with the saddle stop- maybe do a multy stop rotating index.

Gerhard
Guernsey
Channel Islands

Offline Stilldrillin

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Re: Lathe chuck backstop for dummies
« Reply #4 on: August 27, 2009, 04:47:21 AM »
Well done Gerhard......  :clap: :clap:

David D
David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Gerhard Olivier

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Re: Lathe chuck backstop for dummies
« Reply #5 on: August 28, 2009, 01:34:37 PM »
Final parts done

Thanks for comments

Made the Knurled locking nut



And then assembled the lot -wont tighten as it just slips. :(
 Need something to stop rotation. :smart:
So I tapped a m6 tread in the outer sleeve and a 2mm groove in the inner.Then I cut a m6 allen bolt down to lenght and lathed a  2mm end.



This all assmbled well and stopped the rotation.



The whole lot together



And relative to the headstock lenght  the delrin spacer is just to keep things concentric but i dont think it is essential.




And fitted to the lathe -



Next I need a Saddle stop.

Gerhard
Guernsey
Channel Islands

bogstandard

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Re: Lathe chuck backstop for dummies
« Reply #6 on: August 29, 2009, 05:24:41 AM »
That really is a nice job you have done there Geroli.

I will have to get one made for mine now, as I can definitely see the advantage of one of these for longer stock turning, just as John Hill suggested.


Bogs

Offline arnoldb

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Re: Lathe chuck backstop for dummies
« Reply #7 on: August 29, 2009, 09:52:33 AM »
Good job Gerhard  :thumbup:  :clap:

 :beer: Arnold