Tool i/d and Mitutoyo vernier advice please.

I have acquired a job lot of assorted tooling, tat and mysterious objects and I'm hoping for some i/d assistance please. First of all, what is this? Marked Moore and Wright and I'm sure I've seen one before somewhere ...Secondly, I also got a variety of vernier gauges among which is this Mitotoyo but I can't work out if this is something special or if a piece is missing to allow o/d measurement. There doesn't seem to be a way of zeroing for i/d either.

Thanks as ever for any help.

I can't see the edge of the blade, but the first one looks like a bearing scraper. But I cannot recall ever having seen one all in steel before, they are normally wooden handled.

Phil,

The first item is a M&W triangular scraper which is part of a set of three small scrapers the others being a flat scraper and curved one. They are very desirable.

Can't help with the Mitutoyo dial calliper but like you say it was probably a standard item modified for some special purpose.

Eric

Sorry David, not a good picture but it is triangular as Eric has just identified.

Thank for your help.

Thanks Eric. Yes the Mitotoyo may well be a special mod. I think there is something printed on the back which may identify it as such. I'll try to get a picture up. So much to learn!

.

As others have suggested, it looks to have been neatly modified, to serve for i/d and depth measurement only.

Zeroing is simple ... loosen the knurled screw, rotate the dial, tighten the knurled screw.

MichaelG.

Thanks Michael it definitely looks like the vernier has been modified. What's left of the left hand o/d shoulder is 2mm short of the i/d hand. Strange but it must have served a purpose. My question was really about where the measuring point for the i/d starts on the gauge. The only way I can see to do this is to use the depth gauge to fix a starting point. It will never be that accurate but will suffice for my woodworking efforts. If I get ambitious I may even try to make up a filler piece to bring the gauge back to it's original purpose.

Sorry to contradict you Micheal but to zero the dial you use the special tool (that bit of wire with a square bent at one end) that came with the caliper. Turning the dial is just for very minor alignment. I was only thinking about putting up a video on how to do it earlier this week as so many folks seem to not know how it is done.

Yes Chris, you are right, this is not a standard dial vernier. This dial is for fine adjustment only. I'd be very interested in seeing your video!

Thanks all as ever.

.

I look forward to seeing it, Chris

MichaelG.

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Edit: I presume you must be refering to this 'special tool' Chris:

https://www.ebay.com/itm/381686022468

I bought my Mitutoyo dial caliper secondhand, about 30 years ago, and have never seen [or felt the need for] one of those in all this time ... now I'm fascinated.

Edited By Michael Gilligan on 24/08/2018 16:59:57

I have a complete set of the scraping tools, 3 square, flat and curved, a bit light but usable.

Clive

Holy crap, $20 with postage! This is another of those cases where if you have a need for one, caliper user and a clumsy bugger who keeps dropping things, guilty as charged, then you should be able to make your own for less than pennies.

I will video its use and post a link soon-ish, biggest delay will be damn slow whiffy connection.

The finish does indeed look factory fresh, but I still don't understand why the i/d is 2mm offset from the largely unuseable o/d. Maybe just for use as a depth gauge? Intriguing!

.

I think that you will find the shape of the standard external jaws accounts for that.

MichaelG.

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https://goo.gl/images/iuCfdZ

Edited By Michael Gilligan on 24/08/2018 19:47:53

… https://goo.gl/images/iuCfdZ

Had a look at the above link... interesting vernier calliper with two dials, looking at the write up, quite some age. I guess you have the choice of using metric or imperial, or for cross relating dimensions.

George.

As promised a video has been posted on youtube, the link is in a separate thread to allow easier searching for future readers, but just in case the link is here too

https://www.youtube.com/watch?v=Epgo_UW_s-E

Wow $20 for a straightened out paper clip.

Clearly the seller has a great sense of humour! Mine is a short length of 0.9mm stainless wire not too carefully bent to a square at one end.

Well done, Chris

But I can honestly say I have never felt the need to do that ... If mine has ever started to read badly wrong, it's always been because there is a tiny bit of brass swarf stuck in the rack: it's then time to remove the rack for a good clean.

MichaelG.