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View Full Version : How do u remove the bezel of a Mitutoyo 505-626?



moditwell
04-17-2018, 06:16 PM
This is a dial caliper. I tried to remove the bezel but failed. it has no screws and cannot be pried off. I tried to shim it from below and failed. Anyone with any suggestion? Thanks
http://tinypic.com/r/5lc8pj/9
http://tinypic.com/r/5fg6qp/9

loose nut
04-17-2018, 06:56 PM
Looking at the condition of that caliper, you could use a hammer.

moditwell
04-17-2018, 07:10 PM
Appearance is not important. This tool still gives dead on measurement. It returns to dead zero everytine.

dave_r
04-17-2018, 10:22 PM
A BFH would definitely accomplish the job.

J Tiers
04-17-2018, 10:40 PM
Some units have a particular position of the bezel on the unit, that aligns holes, or possibly slots, and allows unlocking the retainer holding the bezel on. Take a good look as you rotate the bezel, and make sure that there is no such system in use with that unit.

J Tiers
04-17-2018, 11:19 PM
Here is more and better info:

http://www.longislandindicator.com/p44.html

moditwell
04-18-2018, 02:55 AM
Some units have a particular position of the bezel on the unit, that aligns holes, or possibly slots, and allows unlocking the retainer holding the bezel on. Take a good look as you rotate the bezel, and make sure that there is no such system in use with that unit.

The bezel turns together with another plate underneath. If the bezel is threaded onto this bottom plate the bottom plate should have some kind of notches or catching slots or holes for tools to grip on so that the bezel can unthread. But I cannot find any of these.

Mcgyver
04-18-2018, 08:00 AM
Jerry are you talking calipers in general or Mitutoyo specifically? I've probably had 1/2 a dozen Mitutoyos apart and in each case the bezel pries off. ymmv...doesn't mean everyone they ever made is that way

JoeLee
04-18-2018, 09:18 AM
Looking at the condition of that caliper, you could use a hammer. I was going to make comment similar to yours but you beat me to it.

JL...................

RB211
04-18-2018, 09:52 AM
What is a -121?


Sent from my iPhone using Tapatalk Pro

reggie_obe
04-18-2018, 10:26 AM
Based on you statement on another board: http://www.homemodelenginemachinist.com/showthread.php?p=304469#post304469
Since this is a treasured item from your father, why risk damage? Send it to Long Island Indicator for repair.

J Tiers
04-18-2018, 10:36 AM
Jerry are you talking calipers in general or Mitutoyo specifically? I've probably had 1/2 a dozen Mitutoyos apart and in each case the bezel pries off. ymmv...doesn't mean everyone they ever made is that way

Th Long Island Indicator link is intended to cover that, THEY say they pry off. The OP says they do NOT. My Mits have never needed to be repaired.

The OP has an older model........

Mcgyver
04-18-2018, 10:58 AM
here, the bezel pried off a 505 628 - same as the 626 caliper but 12" long. with the hand removed the dial just lifts off and the balance of the mechanism is held by two screws under the dial. You're going to need a crystal tool to install the new crystal, or drop in to your local friendly watchmaker (they should have a crystal as well)

guys on the other board talking about glue and retaining clips and heating it? Never seen that and it seems very far fetched, otoh they are not the same vintage and there are design differences so I suppose there are is no absolute guarantee all 505 62x are the same arrangement.

https://i.imgur.com/3rCHEdb.jpg

https://i.imgur.com/srm1O1i.jpg

J Tiers
04-18-2018, 12:19 PM
To be fair, I have indicators (possibly even Mits) that DO have a clip that you access with the bezel in a certain position. Not at all far fetched.

The glue and heat thing (whatever they may have been saying) is clearly NOT applicable to general measuring equipment.... violence not recommended.

moditwell
04-19-2018, 07:29 AM
here, the bezel pried off a 505 628 - same as the 626 caliper but 12" long. with the hand removed the dial just lifts off and the balance of the mechanism is held by two screws under the dial. You're going to need a crystal tool to install the new crystal, or drop in to your local friendly watchmaker (they should have a crystal as well)

guys on the other board talking about glue and retaining clips and heating it? Never seen that and it seems very far fetched, otoh they are not the same vintage and there are design differences so I suppose there are is no absolute guarantee all 505 62x are the same arrangement.

https://i.imgur.com/3rCHEdb.jpg

https://i.imgur.com/srm1O1i.jpg

How come mine is so damn tight?

I have also checked the part number for both bezel

505-628-50 caliper has bezel P/N 131559
505-626 caliper has bezel P/N 129444

Base on the part number that is different, i think mine cannot be pry off

moditwell
04-20-2018, 02:13 AM
Thanks to everyone who share their many suggestions on how to remove the bezel. And here its is, the removed bezel and its guts. I used two Aluminium block and push the bezel from below. It was a hard push downwards before the bezel came off. There was a lot of dirt trapped and explains why its so damn tight

http://tinypic.com/r/34ns9ya/9

Richard P Wilson
04-20-2018, 02:26 AM
Do tell us how you did it. By the way, no photo in your last post.

dave_r
04-22-2018, 03:32 AM
Very disappointing to find out you used a TFH...