Eccentric strap slack

[Mark TyldesleyParticipant @marktyldesley75376]

Hi All

iv two eccentric straps that are either slightly over sized, or just plain worn, still serviceable but will require attention at some point, my question is! Can one mill the joint face down so reducing the slight wear, or should one throw in the towel and make new ones up?

Regards

mark

[Mark TyldesleyParticipant @marktyldesley75376]

[nigel jones 5Participant @nigeljones5]

Hi

The purists will advocate throw away, but if you can remove a bit of metal and make it work then I say do it! Its only like removing bearing shims. You will need to keep an eye on things at the initial wear will be pretty rapid requiring regular readjustment at first.

[Neil WyattModerator @neilwyatt]

I'm with Fizzy – they don't throw away worn ones in full size – bear in mind the back and forth thrust forces ought to make the greatest wear at 90 degrees to the split.

Neil

[GoCreateParticipant @gocreate]

Hi

Any millage/benefit converting to white metal?

They would need boring out over size, cast in the white metal, re-bore to finished size. For small bearings could the white metal be tinned onto the bearing surface in the manor you tin solder?

Just a thought.

Nigel

PS. some white bearing metal here

Edited By tractionengine42 on 14/07/2014 21:53:59

[duncan webster 1Participant @duncanwebster1]

Definitely don't throw them away. Carefully file down the joint face until the strap just nips on the eccentric, then dig out your triangular scraper and engineers blue and scrape away the bit that touches, then file a bit more off and so on until you get it to touch around a reasonable proportion of the periphery, then you shouldn't have to go through the initial wear phase

[michael howarth 1Participant @michaelhowarth1]

In smallish scale stuff (Gauge 1), I have heard that manufacturers use a strip of Teflon (PTFE) between the eccentric and the strap to reduce wear. It seems to me that it could equally be used to take up wear. Haven't tried it yet myself but it has been in use for a few years now.

Mick

[stan pearson 1Participant @stanpearson1]

I don't know why you don't just file the face and bang a adjustable reamer through.

Stan

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