By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Replacing a bushing

All Topics | Latest Posts

Search for:  in Thread Title in  
Tim Gosling02/09/2021 12:04:41
4 forum posts
2 photos

Hi all,

I'm trying to fix my trusty 10 year old cross trainer. There are some bearings that are quite worn which I think are called bushings. They push fit into a steel tube and a steel shaft runs through them. Because they are so worn on the inside I have measured the shaft diameter instead to get an inside diameter for them. The measurements I've taken are:

Internal diameter (diameter of the shaft) 15.4mm

Outside diameter 24mm

Length 17mm

There's also a flange on one end and a notch cut into the side.

I've googled bushings and found a few websites like BearingShopUK, SimplyBearings, BearingBoys etc. but none of the bushings they sell quite match what I need.

So my questions are, is this a non-standard size or possibly an imperial size or perhaps this isn't called a bushing and I'm googling the wrong thing?

img_4263.jpg

img_4266.jpg

Paul Kemp02/09/2021 23:17:58
689 forum posts
18 photos

Tim,

How accurately did you measure the shaft and bushes? None of those sizes (as you state) seem to correlate with standard flanged oilite bushes. So two possibilities, one is your measurements are off or two the manufacturer of the trainer used odd size bushings. The latter makes little sense in terms of cost - making their own bushes to odd sizes adds cost and complexity to their product, however they may have altered the length and OD of a standard product to suit the other materials they were using (although 15.4mm bore makes little sense either) so maybe it was the former! If so the lack of suitable off the shelf replacements protects their product in some ways by ensuring if you want parts you can only source them from them, or it guarantees obselesence and forces you to buy a new trainer? Probably the only way to match those sizes if your measurement is accurate is to make your own!

Paul.

noel shelley03/09/2021 00:11:13
759 forum posts
19 photos

Are the bushes steel, the picture seems to show rust on the bore ? Noel

Pete Rimmer03/09/2021 06:51:05
1072 forum posts
69 photos

Looks like a 5/8" x 15/16" x 11/16" long bushing to me.

Edit: Looks like you have taken the flange OD as your OD size. If so, it should be OD of the bush itself.

It looks like the part number is made up from the relevant sizes in sixteenths of an inch.

Edited By Pete Rimmer on 03/09/2021 07:11:55

Redsetter03/09/2021 07:02:30
191 forum posts
3 photos

Quite possibly an Imperial size, as posted above. There is still a lot of Imperial stuff in use, even in new machinery. I would suggest going to a bearing factor with a trade counter, who can measure it properly and will know the market, rather than trying to do it on line.

Tim Gosling03/09/2021 10:21:41
4 forum posts
2 photos

All measurements were made with a digital caliper. It's an inexpensive one but I think it's accurate. The OD measurement is the bush not the flange, the flange OD is 28mm.

Not sure what they're made of, I agree that does look like rust.

5/8" x 15/16" sounds close enough to me. It's a cross trainer not a nuclear reactor so I can live with a bit of play. Worst case scenario is I fall off it.

Googling 5/8" x 15/16" Bushing comes back with quite a few suppliers, mostly in the US. I'll email some of the UK suppliers first but if I have no luck I'll buy from abroad.

Paul I like the way your mind works, suppliers balancing cost of production Vs being the only source of spares Vs deliberately making their old products unrepairable. It has a ring of truth. Or maybe spending time reading internet forums has made me a conspiracy theorist

pgk pgk03/09/2021 10:58:43
2317 forum posts
293 photos

Have you tried looking for a manual/parts diagram on the web? Some of these gym machines may be rebadged US designs and perhaps a clue if nuts and bolts are non-metric.

pgk

Pete Rimmer03/09/2021 11:45:06
1072 forum posts
69 photos

I would be very tempted to knock up a couple of bushings from Delrin or PTFE.

bernard towers04/09/2021 19:14:08
293 forum posts
84 photos

I would hardly think a cross trainer would have missed imperial fixings by about 30 years.

Tim Gosling05/09/2021 11:40:55
4 forum posts
2 photos

>Have you tried looking for a manual/parts diagram on the web?

I don't think it's a very well known brand. It's called a Sprint Elite XZ1 and when I google that all I get is someone in Dundee selling one for £50 back in 2014

Edited By Tim Gosling on 05/09/2021 11:41:13

pgk pgk05/09/2021 12:52:25
2317 forum posts
293 photos

XZ1 cross trainer finds Hammer https://www.hammer-fitness.co.uk/ and a few hits to hammer xz1 cross trainers in Germany. It may well be the original source of yours - rebadged or renamed. Perhaps a word with the company above to see if they recognise it and have access to manuals or spares?

pgk

Tim Gosling06/09/2021 12:04:31
4 forum posts
2 photos

Thanks pgk, I completely missed that when I searched before. I'll contact them.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
walker midge
Warco
emcomachinetools
cowells
Eccentric July 5 2018
BOLDON
rapid Direct
JD Metals
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest