Anyone know what these are please?
Bottom ones are for stacking slip gauges together
Top one looks to be some sort of v- block
Rubert make precision surface finish measuring equipment. Don't know if that helps?
Cheers thanks, what about this?
That's a tachometer; measures rpm when you press the stylus at the top into the end of a spinning shaft.
Pure guess for the top one, looks to me like it holds round items and the ball bearings allow for easy turning of the round item
Tachometer should have changeable rubber ends to measure either shaft speed (cone adaptor) or run on outer diameter using the roller adaptor to calculate the RPM of parts that the cone centre adaptor wont fit.
like this Smith's one that I was given last year
The top pic is a v block the guys are correct, its really a inspection grade and no use for machine shop use. I'm not sure if the balls are designed to rotate or very simply give minimal point contact for rotation of part to check for concentricity effectively removing any means of high spots or foreign bodies giving false readings.
You won't want that tacho, it'll just get in your way, best send it to me pronto.
Ditto used too use an identical unit (when working) for checking for belt slippage on very large multi belt driven furnace waste gas fans.
That tacho is unusual in that it has a much higher range than usual. Never seen a 50,000 rpm one before.
It's for measuring run out on a turned component. It's a consentricity gauge it's used with a dti mounted onto the other end and you spin on the bearings and watch the dti move through high and low points
Westinghouse Rail had small servo/ Syncro motors running at 20,000 to 30,000 ish RPM on the London underground.
They would run up to a constant speed and from that, via electronics you got a range off timing signals.
They then were replaced by crystal oscillators to give a frequency out put for timings. They now are replaced by digital clocks.
In 2010 Westinghouse, now invensys rail, part of Seimens were still making them as they are still fitted to some sections of the Underground network.
I know! Toolmaker!
Ive got one of those Tacho things but its a lot older looking than that one !
Thanks everyone for the replys, very informative!
You hav'nt now either !! sudduv gone to specsavers
that is like my low speed one
But now you have !! mine! the ones in red boxes are
Errm, check out post #4 Norm.
UUUPS thats with me goin to scrolsavers scrolin upwards not downwards
anyway it IS your fault,
coz you didnt put which tacho -----so there!
Startin to sound like my missus in an argument
(In my defence my lawd--------- my scroll wheel is a pain if I push slightly too hard it goes into auto scroll so easily it is like a rocket bang and the page is gone, to the bottom and sometimes I end up scrolin upwards coz I'm lazy)
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