PAGE 129 — B&S No.1 SWISS MICROMETER
PROFESSIONAL REPAIRS & SALES IN THE U.S.A. SINCE 1959
We are proud to be a Brown & Sharpe and TESA worldwide certified service partner
Your Brown & Sharpe Model 1 micrometer was "manufactured in Switzerland" and discontinued in 2021. This was a professional's micrometer, a highly respected old stand-by of superior workmanship. You wouldn't be able to find anything better.
The following information is provided for reference only.
The graduations are straight line (you remember those slant lines? Very few people liked them so now they're only available by request).The spindle's carbide face has a slight bevel to minimize the possibility of chipping. A convertible thimble lets you switch between a friction thimble or static "feel" thimble. 1-2" models and larger have plastic heat shields on the frame to minimize metal expansion but those models are rarely in stock.
The measuring faces are carbide, as expected. The face on the movable spindle has a slight chamfer on the edge which will help keep the anvil from chipping. If you need a perfectly sharp edge for your application, then this micrometer is not for you.
Each micrometer comes with a manufacturer's certificate of calibration showing actual data.
One more thing: don't be fooled... not all B&S micrometers are Swiss made. You can probably find pretty cheap B&S micrometers made in USA. They're not the same quality, sad to say. Those shown on this page, are the ones worth buying.
We've been repairing these Swiss micrometers for nearly 60 years and we know that they're the best.
|0–1"||*slanted* graduations||not necessary||wooden case||599-1-31-9|
|0–1"||*slanted* graduations||not necessary||included||599-1-31|
|0–1"||straight graduations||not necessary||wooden case||599-1-32-9|
|0–1"||straight graduations||not necessary||included||599-1-32|
|1–2"||*slanted* graduations||1" standard||included||599-2-31|
|1–2"||straight graduations||1" standard||included||599-2-32|
|2–3"||*slanted* graduations||2" standard||included||599-3-31|
|2–3"||straight graduations||2" standard||included||599-3-32|
Clean the measuring faces and then close the spindle to verify the zero setting. If an adjustment is necessary, follow these steps:
Clean the measuring faces with alcohol to remove the protective oil which the manufacturer has applied. Do not immerse the micrometer in the alcohol, just clean the faces. Close the spindle and lock it in place with the lock. The zero should line up. If there's a slight deviation, insert the spanner wrench into the hole on the barrel and turn the entire sleeve slightly until the zero lines up. If there's a larger deviation then you'll want to remove the thimble cap (which screws off) and loosen the hex set screw. At this point you can slide the thimble into proper alignment. Tighten the hex screw, replace the cap and then make any minor adjustments—if needed—as described above.
These micrometers have convertible thimbles. The default is a friction thimble. The idea is that when you close the spindle, the thimble will start to rotate without applying further force on your test piece. This is important because you could inadvertently fudge the reading by over-tightening. The friction thimble makes this impossible. However, some people have developed the skill of measuring by "feel." In other words, they know when to stop turning. If this is your preference you can easily convert your micrometer as follows: Remove the end cap and slide out the plastic sleeve. Invert the sleeve and slip it back in place. Beware of the spring which you'll see on the barrel. The plastic sleeve has to fit easily over this spring. Don't force anything! Put the cap back on, and your micrometer no longer has a friction thimble. Give it a try and see what you think. It's easy to convert back and forth.
Your micrometer is accurate only when the surfaces remain parallel. If the thimble develops side play then you can be assured the surfaces are no longer parallel. You can adjust for side play by removing the end cap, loosen the hex screw and slide off the entire thimble. At this point you can use a wrench to tighten the nut—very slightly—at the end of the spindle. You can now check to see if this has corrected the problem. You may have to make several small adjustments to get it just right. Reassemble the micrometer when you're satisfied.
Should your Swiss made micrometer be subject to dirt or grime, clean and oil it as follows:
Back off the thimble until the measuring screw is free of the bushing threads and clean the parts as required with a solvent such as naphtha or xylol. Dry all parts. Lubricate the bushing threads with a high grade oil applied with a toothpick or eye dropper. Reposition the spindle lock so that the hole will align with the spindle and carefully replace the spindle. Don't force anything. If it won't go in freely then you probably don't have the hole lined up from the spindle lock. You may now have to reset zero as described above.
If your micrometer won't function after you've tried these adjustments, by all means send it to us for servicing before you create irreparable damage. We can resurface the faces to make them flat and parallel when they are worn. If the faces are chipped or seriously damaged, we can replace them.
For a discussion of different micrometer brands, how to calibrate them, etc. please see page 29.
The Brown & Sharpe chrome-framed outside micrometer has a vernier scale in inch units for taking precise outside diameter (OD) measurements, a convertible friction drive thimble mechanism for uniform or variable pressure during adjustment, and tungsten carbide faces for wear resistance.
The micrometer’s frame, thimble, and sleeve have a satin chrome rust- and glare-resistant finish. Frames with a base measurement range greater than or equal to 1” are heat-insulated to help reduce temperature-related expansion or contraction. The vernier scale on the thimble and sleeve is graduated to 0.0001”. Graduation markings on the barrel are straight to help reduce parallax errors when reading. The ratchet mechanism can be disabled for variable adjustment control. The spindle and anvil have flat measuring faces and are carbide-tipped for wear resistance. A spindle lock helps provide secure locking of the measurement position.
Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.
Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, played a key role in setting industrial standards in the United States. Brown & Sharpe was acquired by Hexagon Metrology in 2001, and is headquartered in North Kingstown, RI.
(above description provided by the manufacturer)
N.b.: the models depicted on this page are manufactured in Switzerland by TESA and are branded Brown & Sharpe for sale in the United States.
Caution if buying from Amazon: their product images sometimes do not match the product description. Read carefully!
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