I'd like to have a go at lightening my CV's but where do I get undersized balls?

jump in cold water? seems to do the trick nicely

(someone had to say it)

Thailand? Allegedly there are plenty of lady-boys there with just your request...

Will you be reducing/cutting the sockets yourself? I'm impressed!!!

Steve

Oh is turning the carriers down difficult?

I was hoping to grip them on the inner diameter with a 3 jaw chuck on a lath and turn them down with a standard carbide tipped tool. Never crossed my mind they might be hard all the way through.

Find out shortly I suppose - if I can get smaller balls that is!

You will get a considerable amount of runout if holding it in a 3 jaw and they will be hard.

Carbide tools wont touch hardened steel, you need ceramic or CBN tools for machining it...

Balls are available from most good industrial bearing stockists.

Can be done. Just take some of the unnecessary meat out of the carriers and then you don't have to worry about your balls...
Have a look here scroll down the page and you'll see lightweight Lobros

Ah exchange! So for £40 someone else will do it. Seems reasonable but it can't be that difficult if they are so cheap after all the seller has to make a living.

Flak see your point if its really hard material but should not be any runout if properly mounted in a 3 jaw chuck - I've just finished machining some spiggot rings using a similar method with no probs and the measured runout was less than a thou ( thats all my dial gauge measures to)

Are the originals to a high tolerance perhaps?

Cheers

Edit. Just realised 4 sets at £40 is £160 so I think I'll persist!

[Edited on 5-8-10 by v8kid]

quote:

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Originally posted by v8kid
Ah exchange! So for £40 someone else will do it. Seems reasonable but it can't be that difficult if they are so cheap after all the seller has to make a living.

Flak see your point if its really hard material but should not be any runout if properly mounted in a 3 jaw chuck - I've just finished machining some spiggot rings using a similar method with no probs and the measured runout was less than a thou ( thats all my dial gauge measures to)

Are the originals to a high tolerance perhaps?

Cheers

Edit. Just realised 4 sets at £40 is £160 so I think I'll persist!

[Edited on 5-8-10 by v8kid]

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Youll get zero runout on anything machined ina 3 jaw if its all machined in the same setting, but you will be holding on a premachined diameter and modifying another and you will get a reasonable level of run out with a 3 jaw. Maybe as much as 0.05mm if the chuck is in good condition, if the jaws are worn then expect double that. You can get things to within 0.01 or better in a 4 jaw.

I think the ones in the link are £40 per pair not each.

Hey flak I'm a rough old engineer and 2 thou is OK by me when it's not that important!!

My machinist pal tells me I'll cut anything but HSS if the speed is fast enough and the cut is fine enough. Tried it last night on a gash toughened drive flange and it scared the bejusus out of me. Cut it though and the carbide tip is still sharp.

The old lathe shook about a bit though and I expected the cut to be like a 50p piece but all was OK.

Take your point it's only £80 not £160. Itmight be worth spending the time on stuff that would give a better return - like redesigning the front uprights for the umpteenth time!

Cheers

PS Can someone without being a smart **** tell me where I can get under size balls?