Mitutoyo 0-1" Micrometer

[confederatemule]

I have a Mitutoyo 0-1" micrometer that does not read correctly, in my opinion. When closed the two index lines do line up, but the "0" line is hidden. I can back it off .005 and it is about half way visible, which is where it should, I think.
How can I correct this problem?

Thanks fer any help.

Mule

 

[JimDawson]

Loosen the setscrew on the thimble, and then you can adjust it up and down.

 

[Tony Wells]

Sometimes the sleeve that you turn to set the zero moves away from the frame, hiding the markings. It is held in place by friction. You should see no gap at the frame end. If there is a gap, you can simply push the sleeve home against the frame. Depending on what model number, it could be a couple of things. I have a parts book for Mit, so I can give you the parts breakdown and an exploded drawing if you need it.

 

[confederatemule]

Loosen the setscrew on the thimble, and then you can
adjust it up and down.

I can't find a set screw. I can, and have, remove the ratchet stop, but found nothing.

 

[confederatemule]

Thanks, I got an exploded diagram off of their website. There is no gap at the frame.

 

[JimDawson]

I stand corrected, there does not seem to be a set screw holding the thimble. That tells me it's a press fit on the shaft. I just took one apart to see. My other mics do have a set screw.

In this case, I would follow Tony's lead.

 

[confederatemule]

Thanks, Jim, for your advice.

Tony, there is no model number. I got this mic from my Dad. I have no idea how long he had it. I also got a 1-2" Mit from him. I mentioned this because both mics are the crinkled green. The 1-2 has the Mit logo painted on it in white. If the light is at just the right angle, I can still see a slight trace of the white paint on one side of the 0-1.

Mule

 

[Tony Wells]

Can you link me to the drawing you found? I can probably tell you how to adjust it. Does the drawing exactly match it? Is there a model number on the drawing?

 

[T Bredehoft]

My Mitotoyu 0-1 mike (new in the mid '70s) (I can no longer read the white name) has a hole of about 1/16" in the sleeve, opposite the index. I suspect that there exists a wrench, Y shaped, with a pin in the middle which would fit into this hole. Mine is off .0001, I'm not going to try to adjust it.

 

[confederatemule]

Tony,
I have a Starret 0-1 and a Central 0-1 that read correctly to .001, but, the Mitutoyo is the only one that I have that reads to .0001.

At this link click on the "parts break down " for the "order no. 101-113", best I can tell it is the same as mine.
http://ecatalog.mitutoyo.com/Outside-Micrometers-Series-101-C1094.aspx

or

This one, "order no. 103-127", also, looks like mine.
http://ecatalog.mitutoyo.com/Outside-Micrometers-Series-103-INCH-C1570.aspx

Mule