Telescopic Gauges

[birchy]

Anyone have some advice?

[John S]

I use a couple of sets just like those on a daily basis doing bearing bores with no problem.
Once you get used to them, let them spring open whilst tilted so they are bigger than the bore, then nip the handle and swing them thru an arc and out the bore.

Best to practise on the bore of an old bearing, these are usually dead nuts.

[birchy]

Thanks John. Yeah, I've used telescopic gauges at work but only decent quality ones, so was a bit dubious about those cheap things. You reckon they're OK?