"The Capstan No:7" Gauge

Hi All,

This was in last weeks haul and I have just got around to cleaning etc.

The spring action on this is VERY strong indeed and has only a very sharp pointed plunger along with the various extensions etc.

Does this have some special specific use please?

All seems to be in perfect condition and very clean.

Cheers, Martin

Looks good! Could be a useful bargain.

What is it? Bore Gauge, or Depth gauge? (Can't see for the tissue paper.

Howard

Very nice too.

Brian

Rings a bell from somewhere; not an ordinary DTI - I think it's for measuring bent crankshafts?

Tissue paper removed!:

I think that the two small diameter rods are for turning the collar on the gauge?

I am leaning towards some sort of bore gauge?

Cheers, Martin

Could it possibly be a Capstan 'stroke setting gauge'? Just a thought with it being a Capstan No. 7??

Or it could be a length gauge, are the threaded rods of nominal lengths?

Nice piece of kit which as you say Martin has hardly been used by the look of it.

Regards,

Martin

.

... which would, of course, be a ‘capstan nut’

Could this be relevant, or is it mere coincidence ?

MichaelG.

SOD has it.

Its for measuring crankshaft deflection when the engine is solidly coupled to what ever it is driving. The gauge is usually fitted between the webs of the crank throw nearest to the load, "the drive end". Then shims are fitted under the engine or the load until the deflection is within the specified limits. Still a very relevant piece of measuring equipment.

Used on larger engines as you need to be able to get inside the crankcase through the crankcase doors.

Neil

Edited By Neil A on 29/05/2021 17:40:15

Edited By Neil A on 29/05/2021 17:47:50

It s a crankshaft strain gauge. Here is the Starrett equivalent.

**LINK**

Edited By John Reese on 07/06/2021 02:10:40