Preventing distortion.

[Simon Lee 2Participant @simonlee2]

I have to cut a full length key way in a metre long by thirteen millimetre piece of EN24 round bar. The cut isn't a problem, but I am concerned that the bar will bend horribly when the stress is relieved assymetricaly. Is there any way of stopping it, or correcting it? Thanks, So.

[Simon Lee 2Participant @simonlee2]

[Anonymous]

Depends upon the exact material spec. If it's EN24T then it's hardened and tempered so has already been stress relieved to some extent.

Andrew

[ZanParticipant @zan]

The late great John Stevenson showed us how to straighten a bent lead screw with a lever in his badgers workshop posts. So correcting any bend shouldn’t be too difficult, but it all depends on the exact material spec as Andrew says, and also the function of the part.

Todays update from Bodgers Lodge

Search for this thread, Long, but interesting reading

Edited By Zan on 12/11/2019 13:41:56

[Martin KyteParticipant @martinkyte99762]

Cut another keyway on the oposite side.

regards Martin

[not done it yetParticipant @notdoneityet]

Posted by Martin Kyte on 12/11/2019 14:38:38:

Cut another keyway on the oposite side.

regards Martin

Likely only need to cut the stressed skin of the shaft. Keith Fenner on utube manages t straighten bent shafts quite well. Likely others.

[Simon Lee 2Participant @simonlee2]

Righty ho, vee blocks and a lead hammer it is then. Thank you all.

[not done it yetParticipant @notdoneityet]

Posted by Simon Lee 2 on 25/11/2019 22:41:17:

Righty ho, vee blocks and a lead hammer it is then. Thank you all.

That’s not prevention, it’s recovery!

[Author]

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