Machinist/mechanics-Need your help with this tool.

[oldbrownhat]

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I beleive it is Starrett with a clutch for consistant force (extension knob) The model number is prob on the other side. 436 seems likely That number seems to have been retained for many years.

Starrett micrometer 436 repair

I recently found a micrometer that my father had. It may (or may not) have been used by him when he worked at the MIT Radiation Laborotory around the end of WWII. I do know he was a technician there and he had to do practically everything from machining, to making hydrogen furnaces to assemble...

www.hobby-machinist.com

Thanks for that The gold color had me fooled as I wasn't aware Starrett had any gold-colored tools.
Last time I checked a few years ago the 436 was still available. About $140.00 IIRC. I think I made out like a bandit on mine as it is in perfect condition. Sadly, Starrett was sold to a private equity company last year

 

[deadin]

Here's a couple that have been overlooked.
The Starrett has changeable anvils for different applications. (It is a No.220)
The other is strictly a depth mic.

 

[M29since14]

oldbrownhat, it’s a Starrett, or else it sure looks like one. Starrett made quite a few different versions or styles of vernier-reading micrometers. I did a lot of measuring in the 0-1” range and carried my own micrometer with me, rather than using whatever was lying around. That model was common and least expensive, I believe.

Off topic a bit but I always preferred the “Slim-line” style that Starrett made, which was just a delightful tool. I don’t work much with precision measuring tools these days but I still keep two of them around, my latest one “with all the bells and whistles.” (Hard chromed, tenth reading, carbide faces, friction thimble, etc.) I suppose today it would be considered “obsolete,” about like a .38 Special revolver.

 

[Frailer]

I’m an adjunct machining instructor at my local community college, and every few months a retiring machinist will drop tools they no longer need. Most of the stuff will go out in the shop for general use, but any quality precision measuring tools will get cleaned, checked out and put away in my office to get passed along to young students who show potential but are on a tight budget.

I acquired many of my own tools scouring flea markets and “antique” shops whenever we visit friends in New England. It seems everybody in that part of the country has a father/grandfather/uncle who was a machinist or tool and die maker, and their tools can be purchased for pennies on the dollar. My best bargain so far has been a virtually unused 1-3” Mitutoyo mic set for exactly zero dollars.

 

[tinkerer]

I have several of the above 'mics'... And still know how to read them...

Also have calipers with the same style marking. If someone wanted to borrow one, I gave them the 'old' style. Most new guys handed them back as they didn't know how to read them.

Kinda like driving a stick shift...

 

[wlw-19958]

Hi There,

I beleive it is Starrett with a clutch for consistant force (extension knob) The model number is prob on the other side. 436 seems likely That number seems to have been retained for many years.

Starrett micrometers came with either of two constant force
or torque mechanisms (or drives) or with just a plain thimble
(the mechanic relied on his/her "feel" when using the mic to
determine the proper measurement).

The OP's micrometer is one of Starrett's most popular lines of Mic's,
the 436 series. The one the OP shows has what is called a "ratchet"
thimble or drive. I prefer the other drive called a "friction thimble."

Cheers!
Webb

 

[rwsmith]

I remember transits having a little magnifying glass attached with a string for reading the vernier.

 

[Tom S.]

Before dial calipers and digital calipers, there were vernier calibers. They required good eyes and sometimes a small magnifying glass.

 

[VaTom]

Thanks for your responses. The remainder of the MTSC tools. I use the pliers and the punches on a regular basis. All high quality. The remainder are tucked away in my tool cabinet. Interesting torque wrench.

 

[Martyk]

Here's a bit of trivia I used to throw at apprentices: "How many threads per inch (TPI) on the thimble of that Mic?

 

[Protocall_Design]

Forty threads per inch. I use all of these tools on a daily basis, have for 50 years, making all kinds of things. It's a very rewarding way to make a living.

 

[Jaco1234]

The markings are just like money. Each mark on the thimble is a penny. Each mark on the barrel is a quarter. 4 quarters equal a dollar. 1 thou, 25 thou, 100 thou

 

[Jaco1234]

View attachment 777544

I'm almost guaranteed never to use these ever again but I'm never gonna get what I paid for them.

Wanna bet. They are probably worth more than you paid. They keep up with inflation.

 

[Smoke]

Wanna bet. They are probably worth more than you paid. They keep up with inflation.

I've tried to sell them, I was offered Pennies on the dollar