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micrometers, calibration (general topics)
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  #1  
Old 22nd December 2008, 10:40 AM
Dragonfly Dragonfly is offline
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Please Help! Calibrating Lufkin ID Micrometer

It's a mystery!!!!

I have an older piece of equipment in my machine shop that needs adjusted for calibration, (it is .001 shy of it's zero) and I have no clue as to how it is calibrated.

It is a Lufkin inside mic 1.5" to 32" set with the number 681 on the barrel of the larger handle (I assume this is a model number)

There is a hole on the knurled area but it has been 'pinned' so can not access it. I have had it apart four times now seeing if I have missed anything and I even took it to one of my ASQ friends that is a calibration tech. and he had no idea either.

If anyone knows how to adjust this, has instructions from a similar set, or just plain advice because you have done it before please don't hesitate to send me anything you have. It is a nice set and in great condition.

Thanks a lot! Ree

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  #2  
Old 22nd December 2008, 07:50 PM
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Stijloor Stijloor is offline
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Re: Calibrating Lufkin ID Micrometer

Quote:
In Reply to Parent Post by Dragonfly View Post

It's a mystery!!!!

I have an older piece of equipment in my machine shop that needs adjusted for calibration, (it is .001 shy of it's zero) and I have no clue as to how it is calibrated.

It is a Lufkin inside mic 1.5" to 32" set with the number 681 on the barrel of the larger handle (I assume this is a model number)

There is a hole on the knurled area but it has been 'pinned' so can not access it. I have had it apart four times now seeing if I have missed anything and I even took it to one of my ASQ friends that is a calibration tech. and he had no idea either.

If anyone knows how to adjust this, has instructions from a similar set, or just plain advice because you have done it before please don't hesitate to send me anything you have. It is a nice set and in great condition.

Thanks a lot! Ree
Ree,

I found this at another Forum (Sorry Marc!). It may not be exactly what you're looking for. I'll keep searching for an instruction sheet for calibrating/adjusting this micrometer.

Stijloor.
Thanks to Stijloor for your informative Post and/or Attachment!
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  #3  
Old 23rd December 2008, 06:57 AM
Dragonfly Dragonfly is offline
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Re: Calibrating Lufkin ID Micrometer

Thanks for looking, but I already found that too... and followed up on the site that was mentioned without success.

I have even contacted folks selling similar items on Ebay to see if the instructions were intact with any of the sets.

Thanks a lot for your interest though, let me know if any of you find or know anything else.

Ree

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  #4  
Old 23rd December 2008, 07:52 AM
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Stijloor Stijloor is offline
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Re: Calibrating Lufkin ID Micrometer

Quote:
In Reply to Parent Post by Dragonfly View Post

Thanks for looking, but I already found that too... and followed up on the site that was mentioned without success.

I have even contacted folks selling similar items on Ebay to see if the instructions were intact with any of the sets.

Thanks a lot for your interest though, let me know if any of you find or know anything else.

Ree
Cooper Industries is the owner of the "Lufkin" brand.

Send your question using this form.

Who knows??

Stijloor.
  #5  
Old 23rd December 2008, 08:23 AM
Dragonfly Dragonfly is offline
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Thank You! Re: Calibrating Lufkin ID Micrometer

Thanks I will give it a try... who knows.

Ree

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  #6  
Old 31st March 2010, 11:00 AM
Krink Krink is offline
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Re: Calibrating Lufkin ID Micrometer

Did you have any luck with the request form. I have the same issue with a lufkin stick micrometer. The barrel screws off to expose a seating nut but when you adjust, nothing happens cause your not moving the readout.
  #7  
Old 8th April 2010, 11:26 AM
JohnCTB JohnCTB is offline
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Re: Calibrating Lufkin ID Micrometer

I have a set of Lufkin OD mics that are calibrated by removing the cap from the end of the barrel which allows you to turn the barrel on the spindle .
John
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