Author Topic: Internal micrometers opinions please?  (Read 7081 times)

Offline bry1975

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Internal micrometers opinions please?
« on: June 17, 2011, 02:17:56 PM »
Opinions on the 5-30mm internal mic below, I measure up a lot of watch cases and often don't know the exact size for glass gasket, hence hoping to buy a nice tool that has an exact measurement unlike verynears which always seem to vary?

One other thing 40 odd quid sounds nice but a little cheap?

http://www.bowers.co.uk/products/show/9710




TIA


Bry

Offline spuddevans

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Re: Internal micrometers opinions please?
« Reply #1 on: June 17, 2011, 02:55:25 PM »
One other thing 40 odd quid sounds nice but a little cheap?

My thought was that 40 was a bit pricey, http://www.arceurotrade.co.uk/Catalogue/Measurement/Micrometers halfway down is the internal mic's for 33.00


Tim
Measure with a micrometer, mark with chalk, cut with an axe  -  MI0TME

Offline jim

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if i'd thought it through, i'd have never tried it

Offline bry1975

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Re: Internal micrometers opinions please?
« Reply #3 on: June 17, 2011, 04:00:31 PM »
Thanks chaps they both appear outta stock I'll look at the 25mm-50mms.

Bry

Offline JohnC

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Re: Internal micrometers opinions please?
« Reply #4 on: June 17, 2011, 04:40:51 PM »
Bry,

I have the Chronos 5-30 mm.  Seems fine to me.
John
John C
York, UK

Offline HS93

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Re: Internal micrometers opinions please?
« Reply #5 on: June 17, 2011, 04:51:36 PM »
Thanks chaps they both appear outta stock I'll look at the 25mm-50mms.

Bry

that seems to be happening a lot latley   :doh: :doh:

Peter
I am usless at metalwork, Oh and cannot spell either . failure

Offline millwright

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Re: Internal micrometers opinions please?
« Reply #6 on: June 17, 2011, 05:54:54 PM »
Mmmm first loctite, now micrometers wonder what the price will be when they get some in. Prob like Bogs 20 squid notes.

Offline Bogstandard

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Re: Internal micrometers opinions please?
« Reply #7 on: June 17, 2011, 08:31:52 PM »
Bry,

Internal mic's like that are fine, for general internal measuring work, but do sometime suffer from operator error, due to only having two contact points. Mainly due to not being exactly square to what you are measuring. They do take a bit more practice than say an external mic to get consistent results.

I'm not knocking them as I use mine all the time, and they are much more accurate than say vernier or digital callipers.

If you have room to get them in, although a lot more expensive, three point internal micrometers are vastly superior and get around the two contact point error problems. I just wish I could justify the cost and I would get a couple of different sized sets, but if you want the accuracy, then this is maybe the way to go.

http://www.machine-dro.co.uk/20-40mm-three-point-internal-micrometer-set.html


John
If you don't try it, you will never know if you can do it.

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Offline HS93

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Re: Internal micrometers opinions please?
« Reply #8 on: June 17, 2011, 09:38:07 PM »
There no good there in stock  :D   :ddb:  :ddb:  :ddb:

                                                     :nrocks:
    :ddb: :ddb: Peter  :ddb: :ddb:
I am usless at metalwork, Oh and cannot spell either . failure

Offline Bogstandard

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Re: Internal micrometers opinions please?
« Reply #9 on: June 17, 2011, 09:54:10 PM »
That's why they are more expensive Peter.
 :lol: :lol: :lol: :lol:
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Offline Davo J

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Re: Internal micrometers opinions please?
« Reply #10 on: June 18, 2011, 12:21:53 AM »
I buy a lot of gear through CTC and he has them in stock for 27.15 posted
http://www.ctctools.biz/servlet/the-400/METRIC-INSIDE-MICROMETER-HIGH/Detail
Just click on (add to cart) then click on the (total price) to change it to pounds.
He has other types as well and I have found his 0.001mm digital micrometers for 17.91 to be great and have carbide faces.
http://www.ctctools.biz/servlet/Categories

These all probably come out of the same factory and I have found all his gear to be just as good as the rest.
If you want other things you can add/subtract them to the checkout without committing to see what the postage price is as he combines postage. The usual time is around 7-10 days air mail. If you are after a lot heavy gear he will send them sea freight for about a third of the air price.

Dave

Offline PekkaNF

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Re: Internal micrometers opinions please?
« Reply #11 on: June 18, 2011, 05:27:46 AM »

I have one two point internal micrometer as pictured. I had it for month only. Hard to say really, but It calibrates pretty good on gauge. But I have to take multiple measurements on real word object and because I'm not used to it, it's fiddly. The one I have has a decent ratchet, without it I probably would cast it on epoxy and go heavy handed on valium.

Pekka

* I'll start new topic, still learning ropes here. Thanks Bogs, Pekka
« Last Edit: June 18, 2011, 06:49:49 AM by PekkaNF »

Offline Bogstandard

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Re: Internal micrometers opinions please?
« Reply #12 on: June 18, 2011, 06:33:15 AM »
I am very sorry Pekka, but we were answering Bry's post.

I would suggest you raise your own post, as this is on about micrometers, not bore gauges, two totally different ways of precision measuring, and as far as I am concerned, I wouldn't want to divert away from giving Bry the correct information.
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Offline ketanswali

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Re: Internal micrometers opinions please?
« Reply #13 on: June 18, 2011, 07:33:57 AM »
Thanks chaps they both appear outta stock I'll look at the 25mm-50mms.

Bry

Hi,

Ours are on vessel CGM CMA VFM AQUILA voy.FL754W  :)

You can track the vessel here:
http://www.cma-cgm.com/eBusiness/Schedules/VoyageFinder/VoyageFinder.aspx?VoyageReference=fl754w&SearchMode=SeachThisVoyage

Provided it docks Southampton on 1st July - wind, rain, dock workers willing, we might have it in stock in about ten days after that   :med:

Price will be same as on website.

Ketan @ ARC.
Ketan @ ARC

Offline bry1975

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Re: Internal micrometers opinions please?
« Reply #14 on: June 18, 2011, 03:02:19 PM »
Thanks for the info and advice chaps,

Will look at buying some internals soon always nice to get a more exact measurement.