I am trying to rebuild a small air/vacuum pump
It's like a mains-powered version of the popular tyre inflator, and was rather better built. … until someone had a go at fixing it.
The big-end bearing appears to have about +/- 10 degrees of angular play, but most of that is in the housing !!

A few drops of Loctite 'Bearing Fit' would probably have fixed the original problem … BUT the genius technician decided to do this instead:

… Yes, folks … it's been 'staked' or 'peened' … or some-such … 
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This is going to be an interesting restoration
MichaelG.
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Edit: for scale … the bearing is 1/4" bore
Edited By Michael Gilligan on 29/09/2018 21:46:21