Micrometer types

[PixMan]

A few more after visiting the shop:

Starrett No.T2XRL, 1-2". I bought this one new around 1980, closest match to my No.T230RL. It has the carbide faces, ratchet thimble, tenths reading vernier scale. Nice & compact for a 1-2" micrometer and feels good in hand. Like most Starrett micrometers, it's got their eccentric ring style locknut. I much prefer the lever style on Mitutoyo's, something Starrett started using with their newer electronic ones. It came without a case but did have the 1" disk-type standard.


Mitutoyo #293-331, 1-2". Carbide faces, ratchet thimble, .00005"/.001mm resolution. A good, easy-to-read digital electronic with analog scales. While I prefer the friction thimble versions, a $73 deal on eBay couldn't be passed up. No case or standard. I like the fact that it's an "Absolute" encoder, so I can switch to incremental mode to make comparative measurements and switch back to absolute at the touch of a button.


Mitutoyo #122-126 blade mic, 1-2". Like the 0-1", no carbide tips ut does read to .0001" via the vernier scale. It also has the ratchet thimble, but note that none of the blade mics have thimble locks. The plastic case is pretty beat up, and missing the foam that so often deteriorates in this micrometer's era of manufacture. another eBay buy, I seem to recall about $55 - $60.


Mitutoyo #122-127 blade mic, 2-3". All the same specs as above, though the case and it's contents in MUCH better shape for nearly the same price. And it came with the wrench and 2" standard as well.


Brown & Sharpe #53, 2-3". This one was bought off a coworker for $40, no case, wrench or standard. It reads tenths via vernier scale, has carbide faces, but plain thimble with no ratchet or friction device. Uses an eccentric ring locknut like so many Starrett mics do.


Brown & Sharpe #65, 3-4". I bought this and the next (5-6") at the old Norton Grinder factory on the day after the auction. The two micrometers were cherry-picked off a 1/2 gaylord (a box 4' x 4' x 2' tall) full of micrometers of all sizes that hadn't sold at auction. Both mics for $40. Like the smaller #53, it has carbide faces and tenths vernier scale, though a completely different frame that more resembles a Starrett No.436 with the eccentric locknut.


Starrett No.436L, 5-6". Bought together with the above B&S #65, this one is probably the most well-used in my collection even though I rarely use it. No carbide faces, plain thimble, though it does have the locking ring. No case, wrench or standard. Note teh old Norton logo stamp on the frame.


Starrett No.449, 0-3". Bought via a Craiglist ad from a retired Starret employee for $30. Non-rotating blades, 2-1/2" long base.


Starrett No.449, 0-6". Bought new around 1982 or 1983. All the rods for both No.449's can be interchanged now that I've calibrated all of them.


More when I have time to collect my dad's from all the places in the shop that he leaves them!

Ken