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Mitutoyo 141-122 8in-40in ID Micrometer - $250 (Caledonia, MI)

Mitutoyo 141-122 8in-40in ID Micrometer 1 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 2 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 3 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 4 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 5 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 6 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 7 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 8 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 9 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 10 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 11 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 12 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 13 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 14 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 15 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 16 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 17 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 18 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 19 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 20 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 21 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 22 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 23 thumbnailMitutoyo 141-122 8in-40in ID Micrometer 24 thumbnail
make / manufacturer: Mitutoyo
model name / number: 141-122

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Purchased as part of a large lot at an industrial liquidation auction, for sale is 1 Mitutoyo 141-122 8in-40in inside diameter tubular micrometer.

Mitutoyo 141-122 8-40” Tubular inside micrometer (labeled MIC-04230)

Very short TL;DR for those who don’t want to read the novella below: the mic is in good working order, some anvil heads have wear and some are nearly unused - all are in usable condition. All anvils present, both spacers and adjustment wrench present. Case has moderate wear. Contents: 141-122 micrometer head, 8 anvils, 2 spacers, 1 wrench, original Mitutoyo certificate, original case.

Detailed inspection / service / light refurbishing log below. If you want to know *absolutely everything* about the tool, here you go. It isn't a short read. You have been warned.

Removed toolset from case, set aside on protective padding (bubble wrap, prevents rods from rolling).

BOX DETAILS:

Foam padding had degraded, vacuumed out broken-down foam particles. After further inspection, decided to fully remove remaining foam (will use temp padding).

Two wood support blocks had failed glue. Re-secured with 3M hot glue (Polygun TC).

5 of the 8 small brad nails holding the front 2 latches in place had slightly worked themselves loose, allowing play in parts of the latch brass. With the flat of a screwdriver head and a finger pressed on the interior of the wood, pressed nails back into seat with gentle to moderate force. Slight play still exists in 1 of 4 latch brass pieces (top left).

Checked 8 small Phillips screws holding brass hinge: 3 were slightly worked loose, tightened with very gentle torque making sure not to turn hard enough to strip the wood.

Note: slight warping of the wood case is visible in the top lid as seen by a slight arching gap where the top and bottom wood lid faces do not perfectly meet (shown in pictures).

TOOL DETAILS:

Cleaned rods with paper towel. Gently wiped rod working surfaces (minimal force). Some surface rust on opposite end of rods (the part that clamps into the mic base) - wrapped dry paper towel and squeeze/rotated with moderate force to wipe away surface rust - 98+% success. Minimal spotting remains on 20-24” rod, smaller amount on 12-16” rod. Slight remaining grain-speckling type surface rust remains on 28-32” rod. Certain all can be fully cleaned with any method more aggressive than my moderate force with a paper towel approach (chemical, light abrasive, etc...).

Some of the rods still have some stuck-on grease/dust on parts of the rod middle - this is where the anvil rods should be handled from and does not affect tool function in any way.

Actual micrometer cleaning not needed beyond wiping degraded foam dust away (sole exception: adjustment-hold screw had some crud on it from handling, cleaned gently).

Micrometer adjustment dial has a consistent and smooth rotation through the entire marked range, with no ‘sticky’ spots or any change in rotational force feedback. Zero mark aligns perfectly at all marking lines during travel through measurement range. Adjustment set screw operates properly to hold position with no difficulty. Anvil securing screw operates properly. Set screw and anvil securing screw are both non-retaining (can be removed / replaced). Threads on both screws are undamaged.

Micrometer noted as having hand engraved: “NSP.30.02” just to right of black plastic middle. “8-40” .001” label noted as having mild partial fading of white ink. Mic has sticker label: “PRIMO instrument TAG# 76958 ID# MIC-04230 DUE 2008-08-06”. Numbering on mic adjustment dial fully legible, no wear or damage to numbering. Some minor oil/dirt in knurling from handling.

NOTE: removed shortest mic anvil (8-12" anvil currently installed in micrometer) to inspect stem for corrosion. Was still coated in very slight layer of oil, no corrosion found. Be aware that any prior calibration is therefore undone. I also inadvertently loosened the adjustment screw-down head for that anvil in the process (tightened it back up when I realized it was loose) but that will be another indicator that calibration will be needed before use on that anvil (calibration is presumed to be needed anyway for ANY used precision tool, but I want to make sure to detail everything).

ANVIL HEADS:

Anvil head inspection: these anvils are rounded-head (not spherical head, but moderate rounding)
Inspection done with Amscope SM-4TPX microscope & RT5109 camera.

BE AWARE that the close-in pictures of the anvil heads are through high magnification on an inspection microscope, imaged with polarized light and a high-end microscope camera - you will literally be seeing details at a microscopic level, which means any flaw appears much more pronounced. Please compare the picture of the anvil being held in my hand to the following picture of the same anvil under the microscope to understand.

Integrated anvil head on adjustment dial of micrometer: moderate wear, some microscratches present with light corrosion (microscratches and light corrosion only visible under microscope, not visible to naked eye). This is the anvil surface with the greatest wear, which makes sense as it is the only anvil surface used every time the tool is used.

8-12” anvil (installed in mic): light to moderate wear, one side + some edges retain mirror-finish, perhaps 30+% mirror surface.

12-16” anvil: gently removed gunked-on spot of grease/dust at anvil tip. Majority of anvil tip retains mirror finish, area under where gunk was (close to, but not at direct anvil apex) is not mirrored, appears to retain a thin coating but may be fully restorable with non-corrosive cleaner. Affected area does not appear to be etching, abrasion, or in other way damage to anvil surface but just a stuck on coating.

16-20” anvil: moderate wear on whole anvil face, this was probably a commonly used anvil. No deep scratches, no cracks or rust on anvil. No remaining mirroring. Usable.

20-24” anvil: moderate wear on whole anvil face + surface splotch still present from removed grease/dust spot, this was probably a commonly used anvil. Similar state to the 16-20” anvil though the wear is slightly less pronounced. No remaining mirroring. Usable.

24-28” anvil: light to moderate use present, 1 microscratch with slightly detectable discoloration noted due to embedded grease/dust in scratch (sub-millimeter scratch length, micron-scale scratch width, requires microscope at high-magnification to see, not visible to naked eye). Edges remain mirrored, ~20% mirroring-finish.

28-32” anvil: minimal use evident. Slight wear marks at anvil apex, 80+% of anvil surface is mirror-finish.

32-36: anvil: extremely minimal use evident. Very faint wear marks, 90-95% of anvil surface is mirror-finish.

36-40” anvil: light to minimal use evident. Slight wear, minimal splotch where grease/dust was present on anvil, 85+% of anvil surface is mirror-finish.

The following anvils have had their adjustment screws secured with some kind of glue or loc-tite variant: 12-16, 32-36, 36-40 and the integrated anvil in the mic.
The following anvils have not been subject to glue/loc-tite: 8-12 (currently in micrometer), 16-20, 20-24, 24-28, 28-32.

Padded micrometer ends with protective thin closed-cell foam, secured with rubber bands. Additional bubble-wrap around rod insertion bases where they can contact wood. Layered bubble wrap in place of now removed old/degraded foam. Replaced micrometer set into case. Replaced spacers x2, replaced adjustment wrench, replaced Mitutoyo certificate.

End log for inspection / service / light refurbishing of Mitutoyo 141-122 Micrometer ‘MIC-04230’ 2024-May-15 T:1955.

No trades. Cash only. In-person transaction in a public location only. Absolutely no exceptions.

I am prompt responding to email, usually answering in 1-2 hours. Next day response at worst if work is busy.

post id: 7747374829

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