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Brown & Sharpe Intrimik Tri-O-Bor
Swiss
Style B - Digital Reading Hole Micrometer


 

Top-of-the-line Model 599-238-16-1 shown above with optional 1.2" setting ring

"Digital Reading" does not refer to anything electronic. The barrel of this direct reading hole micrometer has small numerals which display the correct reading to .001" (0.01 mm on metric models), much like the early "digital" alarm clocks of the 70's. An additional division on the display will allow you to read down to .0002" It's totally mechanical and easy.

The three replaceable tungsten carbide measuring arms are flush with the bottom of the gage so that not only through holes but also blind holes can be measured.

This Brown & Sharpe precision Intrimik is made in Switzerland by Tesa. You can expect durability, reliability and accuracy from this manufacturer. This is the type of gage you will want to invest in, if you're planning on being in the business for a while. Nothing better is available.

Intrimiks are available singly or in sets which cover larger spans. Each Intrimik will require a setting ring, as shown in the photo above. These rings are sold separately but they are included in complete sets. Complete sets also include some tools: a screw driver, two spanner wrenches, a heat insulating rubber sleeve. The single units come in cheesy foam boxes, but the complete sets have fancy molded plastic suitcases. They're expensive; you'll want to store them carefully.

For easy ISO integration, an ID number, inspection report and declaration of conformity are included.

 

Tri-O-Bor single instruments .0002" reading

Model Number

Range

Max error

Measuring depth

Internet Sale Price

599-238-8-1

.6 - .8"

.00012"

5.2"

check price and stock

599-238-10-1

.8 - 1.0"

.00012"

5.2"

check price and stock

599-238-12-1

1.0 - 1.2"

.00012"

5.2"

check price and stock

599-238-16-1

1.2 - 1.6"

.00012"

5.4"

check price and stock

599-238-20-1

1.6 - 2.0"

.00012"

5.4"

check price and stock

599-238-24-1

2.0 - 2.4"

.00012"

5.4"

check price and stock

599-238-28-1

2.4 - 2.8"

.00016"

5.8"

check price and stock

599-238-32-1

2.8 - 3.2"

.00016"

5.8"

check price and stock

599-238-36-1

3.2 - 3.6"

.00016"

5.8"

check price and stock

 

  • These gages can not be ordered online. It will be necessary for you to contact us
  • Sizes up to 4.8" are available. Metric sizes are also available. Please contact us for details.

     

Measuring depth

 

Measuring depth is limited to about 5" depending on the size of the gage, but up to two 5.9 inch extension can be added optionally to any Tri-O-Bor gage from size .6" to 4.8" (the manufacturer recommends not using more than two extensions).

Taking measurements

 

With the Brown & Sharpe Intrimik you can take direct readings, as if it were a micrometer. This is different from dial bore gages which would only be used as comparators.

  • Insert the Intrimik into the bore to be measured.
  • Turn the ratchet until it engages (clicks), then give it one and one-half more turns, holding the Intrimik lightly in position. The gage will now be properly seated in the bore.
  • Read the indicated value.

     

Zero setting the Intrimik

 

  • To begin with, never force the ratchet at either end of the measuring range. Then follow these manufacturer instructions which are included (along with illustrations) with each new gage.
  • Thoroughly clean the measuring inserts of the Intrimik and the setting ring.
  • Put the setting ring on a flat surface. Insert the Intrimik into the bore of the setting ring and turn the ratchet until it starts to click.
  • While holding the gage lightly in the bore, give the ratchet one and one-half more turns. The Intrimik will now be properly seated in the bore.
  • Compare the reading of the Intrimik with the dimension printed on the setting ring.
  • If the readings are different, you'll have to reset the Intrimik as follows:
  • Loosen the screw on the body with the screw driver provided.
  • Turn the sleeve until the reading in fractions of an inch shown opposite the index mark in the window corresponds with the value shown on the setting ring.
  • Tighten the screw.
  • Insert the screw driver in one of the slots of the ring and turn until the correct .1" appears opposite the index mark in the window.
  • Remove the Intrimik from the setting ring and bring the zero of the fraction scale opposite the index mark by turning the ratchet in the measuring direction (right to left).
  • Check the .1" reading and correct if necessary.

     

Other Options

 

For a discussion of other hole measuring options, take a look at Internal Bore Micrometers on page 25.

 



 

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This page's most recent revision: 11 AUGUST 2016
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Original photographs and content copyright 2016 by JWGrum

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