Starrett micrometer.

[Graeme SeedParticipant @graemeseed34272]

Hi All, I’ve heard of a Starrett? 0-25 outside micrometer that has 2 thimbles, 1 measures thous and the other inline thimble measures 10ths. Anyone know the mic code number? My memory has lapsed a bit, I’m thinking, model 220 or 230 but these are different to what I’m searching for for my collection. Many thanks, Graeme.

[John HinkleyParticipant @johnhinkley26699]

I asked Mr. Google and he said it was probably a T221XL.  Pricey, mind.

John

 

[Nicholas FarrParticipant @nicholasfarr14254]

Hi Graeme, might this be the one you are thinking of.

Regards Nick

[peak4Participant @peak4]

A little video of the Starrett one here

Here’s an alternative approach from Brown & Sharpe, courtesy of Robertson Miniatures.
https://www.instagram.com/p/DC9rvbdy0-M/

https://www.robertsonminiatures.com/antique-tools

Also on Facebook; where he often posts unusual micrometer pictures on a Friday.
https://www.facebook.com/robertsonminiatures

Bill

[SillyOldDufferModerator @sillyoldduffer]

My 50th Anniversary Starrett Catalogue (1930) shows Micrometer Caliper №230 has a conventional thimble, as do all the micrometers listed back then.   Nothing like John’s T221XL in 1930, though perhaps the tenths №230 was modified later?

The №230 variant pictured by Nick has a friction thimble, which I think is different from Graeme’s tenth’s measuring inline thimble, as per T221XL .  Dunno – does anyone have a tenths №230?

Studying Starrett’s Anniversary Catalogue puts me off collecting them because there are so many models and variants!  For example №575 is a screw-thread micrometer with A,B,C and D models covering different TPI, plus corresponding metric ‘M’ models. Both are supplied with either fixed or moveable anvils.   That makes 16 variants, some them likely to be rare.  Once they’re all acquired, start again with №585 which is the same, apart from having a 2″ frame.

Some unusual ones:

• №204 – Quick Adjusting
• №228 – Hub Micrometer
• №220 & №221 – With Finger ring
• №223 – Paper
• №222 – Sheet Metal
• №210 – Screw Thread Comparator
• №238 – Heavy
• №127 – US Ordnance
• №128 – Round work up to 4″
• №175 – Inspector’s Gauge (fits through holes, for example to measure boiler plates)
• №31   – Inspector’s Gauge (fits through small holes, graduated in ¹⁄₃₂  and ¹⁄₄₀”)

And once one has collected the entire standard range, there’s more:  Starrett sold cased display collections (POA), and had a “Special Order Department”…

If anyone has an unusual Starrett,  please share photos.

Dave

 

[Graeme SeedParticipant @graemeseed34272]

Hi, thanks John. Problem is, do they work properly. Spares etc would be hard to come by, being delisted. Graeme

[Graeme SeedParticipant @graemeseed34272]

Hi Nick, I have this model 230, measuring to 10ths, but its very different to the 221. Thanks, Graeme.

[Graeme SeedParticipant @graemeseed34272]

Hi Bill, a wonderful, well explained video. This mic is a marvel. I’ll get one someday, I hope. Regards, Graeme.

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