‘Go- No Go’ or something more?

[not done it yetParticipant @notdoneityet]

As pics really. Looks like s go-no go gauge in one action, but not entirely sure. Name on one side is ‘UNIFEEL’.

Pins are 1/4” diameter and 3/8” between centres. Former is exact but later varied by about 3-4 thous.

[not done it yetParticipant @notdoneityet]

[KWILParticipant @kwil]

The name "Unifeel" surely answers the question? One action checks the "feeling" ie "fit"

[Bill Davies 2Participant @billdavies2]

It is referred to as a 'snap' gauge. Still used, just google. In my experience, generally used on the shop floor, for cylindrical features, actual measurements made by various other types of gauging in the inspection department. It looks like a pretty old example, given the narrowness of the gauging pins, unless they have been cut down to fit into a gap or slot.

[not done it yetParticipant @notdoneityet]

Thanks guys. The gauging pins have been filed flat. Si-le little tool. I’ll hang it on the workshop wall somewhere…

I’ll look up ‘snap gauge‘ on ‘goggle’.

[Mick B1Participant @mickb1]

Can't see how narrowly the pins are tapered. Could it be to check the root diameter of an external thread or undercut – for whatever reason?

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