Machining a bearing housing

Half a thou under the bearing o/d. Once that just fits the housing the bearing will be a light press fit.

You need to get yourself a set of telescoping i/d gauges I think. They are hard to use but the cheapest way of measuring bore sizes. Better are Mitotuyo type two prong bore gauges and better still the three prong gauges but then you're into several hundred quid.

Thanks Dave. Just what I needed to know.

Mike

In message , snipped-for-privacy@virgin.net writes

In the absence of an internal micrometer it might be worth while acquiring an internal spring calliper - they don't cost an arm and a leg these days.

As for gauges, I believe its called a go-no-go gauge. It is a short length of rod, one end is 'just' undersize and the other end is 'just' oversize. But when it comes to how big is a 'just' I'm afraid I can't be more helpful.

Alternatively, if your machining skills fail you, there may be a grade of Loctite that can be used as a 'putting-on-tool'.

They _are_ hard to use and a big disappointment. I gave up using them, as did everyone else I know who tried. I've had far better results with the old fashioned internal callipers; if you use them right you can measure down to a few tenths.