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Replacement shafts?

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Tony Kenny29/12/2017 09:39:55
282 forum posts
62 photos

I've got a couple of motors with bent shafts, tried to straighten them, but that's mission impossible.

Despite lots of searching, I've not found anywhere to buy replacements shafts only. Are they usually available and I'm just not looking in the right places?

Denis Watkins29/12/2017 10:15:48
3879 forum posts
60 photos

Here you go Tony


RC Plane Flyer29/12/2017 10:28:37
637 forum posts
16 photos

Motor make and size or model that motor came out of would give us a better guide to guide you

Martin Harris29/12/2017 10:45:24
8806 forum posts
215 photos

Do you have a mate with a lathe? You (he) might be able to get the shaft straight with the aid of a dial test indicator...

John Rudd29/12/2017 11:09:25
96 forum posts
2 photos

Rather than wasting time trying to straighten a bent shaft, just make a new one.....

Get some silver steel of the appropriate diameter, sources ebay for one, or Macc models ( google )

Securing flats can be added with a small file....and the groove can be cut on a lathe with a piece of broken hacksaw blade appropriately shaped....( if you have a mate with a lathe..cheeky 

Edited By John Rudd on 29/12/2017 11:12:38

onetenor29/12/2017 11:32:13
1900 forum posts

Just a dremel and a steady hand will make a groove . Hold the steel in the Dremel held in a cushioned vice. steady your hands by resting them on the vice top.As Alexander says S'//(.....

Stuphedd29/12/2017 13:54:47
655 forum posts
351 photos

Do what John Rudd has suggested , !!


you know it makes sense !

not expensive and you will have some left over for next time .


PS if you can avoid cutting circlip grooves in the shaft it will eliminate a stress raiser , If there is room use a collet instead !

Edited By Pete Willbourn on 29/12/2017 13:56:57

gliggsy29/12/2017 15:42:49
97 forum posts
4 photos

LMS, get the relevant size piano wire and make your own, a Dremel helps as piano wire is too hard to cut with hacksaw.g

Martin Harris29/12/2017 16:31:06
8806 forum posts
215 photos

Unfortunately, all the "piano wire" I've bought over the past decade or two has cut fairly easily with a hacksaw! I'd use silver steel by preference as it is accurately ground to size.

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