Facing bar ends parallel on the lathe.

[Ron LadenParticipant @ronladen17547]

That magnetic test indicator mount looks very handy Jason did you buy it or make it up yourself.

Ron

[JasonBModerator @jasonb]

Which one they are both magnetic? Though they both came from ARC

[Ady1Participant @ady1]

Ebay cheapie, I've had one for 10 years, although I presume Jason has put a nice DTI on it

[JasonBModerator @jasonb]

Yes nice ARC DTIs

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Robin Graham on 10/08/2020 00:02:56:

Thanks for replies. I understand that milling is the 'natural' technique for making the ends of a bar parallel, but for various reasons it's not an option here.

Several good ideas for doing it on the lathe though – I'll experiment. I think Martin's / Gray's suggestions of turning between centres will be the first experiment – it's a technique I've never used, so it'll be fun and seems to be guaranteed to work – provided the lathe's set up correctly of course!

[…]

.

Robin

Posting on your ‘faceplate’ thread this morning reminded me to mention this …

For best results when turning between centres, you will [obviously ?] need to switch the workpiece end-for-end, rather than changing tools and saddle position. … You want both faces to end-up either flat or very slightly concave.

MichaelG.

[blowlampParticipant @blowlamp]

Posted by Michael Gilligan on 15/08/2020 12:21:18:

Posted by Robin Graham on 10/08/2020 00:02:56:

Thanks for replies. I understand that milling is the 'natural' technique for making the ends of a bar parallel, but for various reasons it's not an option here.

Several good ideas for doing it on the lathe though – I'll experiment. I think Martin's / Gray's suggestions of turning between centres will be the first experiment – it's a technique I've never used, so it'll be fun and seems to be guaranteed to work – provided the lathe's set up correctly of course!

[…]

.

Robin

Posting on your ‘faceplate’ thread this morning reminded me to mention this …

For best results when turning between centres, you will [obviously ?] need to switch the workpiece end-for-end, rather than changing tools and saddle position. … You want both faces to end-up either flat or very slightly concave.

MichaelG.

This is true.

I'll add that for supreme accuracy, be sure that the heastock centre is running true, and if it isn't, then give it a skim in position to make it so.

Martin.

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