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From: Bob La Londe <none@none.com99>
Newsgroups: rec.crafts.metalworking
Subject: Re: Inside micrometer
Date: Tue, 9 Jul 2024 11:45:03 -0700
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On 7/8/2024 7:29 PM, Snag wrote:
> On 7/8/2024 7:15 PM, Bob La Londe wrote:
>> On 7/8/2024 11:08 AM, Snag wrote:
>>> On 7/8/2024 12:41 PM, Snag wrote:
>>>>    I scored an older unit complete with all the rods ...but they are 
>>>> not set correctly . The 1.5-2.5" is off by about .009" short of 1.5 
>>>> when the thimble is zeroed . Looking into the end that goes into the 
>>>> head I see a setscrew . I think this is used to set the rod length 
>>>> but I want to be sure of procedure before I go reefing on it . The 
>>>> other question I have is about the "extended" setting . The head 
>>>> only has .500 of travel and there are 2 setscrew dimples in the 
>>>> mounting sleeves . When in the "long" dimple it's about .050" short 
>>>> .  I suspect there must have been a .500 sleeve that set the proper 
>>>> length in the long position . Any help will be appreciated !
>>>
>>>    I guess I should have mentioned this is the Sherr-Tumico unit I 
>>> posted about last week .
>>
>>
>> I wish I had something constructive to say... so instead I'll say 
>> this, "If you can make it give you useful readings it probably isn't 
>> wrong."
>>
>> Yesterday I drilled and tapped a mold for bolt on hinges.  (Shop made 
>> hinges) One hinge was 1/16 inch off on all three holes.  I put a 
>> washer in between, and not only does it work great, but it looks cool 
>> like a layered knife scale.
>>
>> After correction I reprinted my print and stuck it to the mill with a 
>> magnet.  Then I shipped the mold.  Now the print clearly shows a 
>> washer used as a spacer in the lower hinge.
>>
>>
>>
> 
>    There ya go , making lemonade again ! I've done a little poking 
> around , there is a .500" spacer missing . Length adjustment is going to 
> be easy , that is a setscrew in the sleeve . The rods are threaded so 
> all I need to do is figure how much and which way to adjust them . For 
> now I'm going to get the 2.5 - 3.5" rod set up so I can fit a couple of 
> cylinder sleeves . Gotta be pretty accurate on this one , the cast 
> aluminum (water cooled) cylinder block walls are kinda thin and I'm 
> afraid if I put too much interference on the fit I'll crack one . That 
> would be a Bad Thing .

P.S.  My corrected print does not actually say, "Scab washer in here."




-- 
Bob La Londe
CNC Molds N Stuff


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