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Etalon Ingage 531B
Sales & Repair Service - Hole micrometer

Unlike the cheap Asian imports, these gages have been in use for decades and you can confidently expect them to be useable for many more.

Manufactured in French-speaking Switzerland, Etalon ingages (also called Intalometer) are indisputably the best quality internal bore measuring micrometers. These will make direct readings right to the end of a blind bore (the bottom of the hole).

Three tungsten carbide tipped measuring arms extend from the end of the larger gages (> 4") when the thimble is turned, and readings are taken from the vernier, just like a micrometer. Gages under 4" have hardened steel measuring arms. Very small bores under .402" only have one or two hardened steel arms, for 2 point measurement.

Because of the mechanics involved, the ranges are quite narrow for each gage. You can buy the ingage model which will measure exactly the bore you are testing, or you can buy these in a full set so that you will have a large measuring range. Each ingage has to be calibrated to a setting ring, so you'll need one or more of those as well.

Gage heads are not interchangeable. That means you won't be able to remove the spindle of one gage and insert it onto another measuring head. Each unit must stay intact.

A nice feature of the Etalon ingage is that several depth extensions can be added which allows you to measure deeper bores. No other tool allows you to measure small diameter bores at any depth beyond a few inches.

For easy ISO compliance, each gage has an ID number and comes with an inspection report and declaration of conformity.

Metric models are also available.

EqVLwAN3LSL1500

Full sets: inch reading - very small bore

  • 0.188" - 0.402" range
  • Graduations: .0001"
  • Measuring arms: hardened steel
  • Maximum permissible error: 2 µm (~.00008")
  • Repeatability: 3 µm (~.00012")
  • contains 4 measuring heads
  • one 4" depth extension (read information on depth extensions below)
  • 4 different setting rings
  • serial number, inspection report with declaration of conformity
  • storage case
  • Made in Switzerland
  • model 78.110600 ... check price and stock

Full sets: inch reading - small bore

  • 0.396" - 0.804" range
  • Graduations: .0001"
  • Measuring arms: hardened steel
  • Maximum permissible error: 2 µm (~.00008")
  • Repeatability: 3 µm (~.00012")
  • contains 4 measuring heads
  • one 6" depth extension
  • 2 different setting rings
  • serial number, inspection report with declaration of conformity
  • storage case
  • Made in Switzerland
  • model 78.110602 ... check price and stock

Full sets: inch reading - mid bore

  • 0.794" - 1.604" range
  • Graduations: .0001"
  • Measuring arms: hardened steel
  • Maximum permissible error: 2 µm (~.00008")
  • Repeatability: 3 µm (~.00012")
  • contains 4 measuring heads
  • one 6" depth extension
  • 2 different setting rings (1.000" and 1.400")
  • serial number, inspection report with declaration of conformity
  • storage case
  • Made in Switzerland
  • model 78.110604 ... check price and stock

 

  • More about setting rings (see page 163)
  • Comparing different types of internal bore measurement gages (see page 25)

     

Individual Etalon 531B Ingages

 

B1a

Ingage with vernier readings of .0001"

Range

Max error

Depth

Model number

Your INTERNET Price USD

.188" to .238"

.00008"

1.26"

78.112374

check stock and price

.233" to .278"

.00008"

1.26"

78.112375

check stock and price

.272" to .338"

.00008"

2.0"

78.112376

$910.00 order now

.332" to .402"

.00008"

2.0"

78.112377

check stock and price

.396" to .502"

.00008"

2.0"

78.112378

check stock and price

.496" to .602"

.00008"

2.0"

78.112379

check stock and price

.596" to .704"

.00008"

2.17"

78.112380

check stock and price

.696" to .804"

.00008"

2.17"

78.112381

check stock and price*

.794" to 1.004"

.00008"

2.17"

78.112382

check stock and price

1.394" to 1.604"

.00008"

2.17"

78.112385

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1.795" to 2.005"

.00012"

4.4"

78.112387

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1.995" to 2.405"

.00012"

4.8"

78.112388

check stock and price

2.395" to 2.805"

.00012"

4.8"

78.112389

check stock and price

 

*Note that some of the images displayed when checking stock do not match the descriptions.

Please contact us if you would like to place an order unless there is an ordering link shown above. It is fair to say that these are rarely in stock in the US. You will have to allow 6 to 12 weeks for delivery in most cases. You may want to inquire first about current stock. Other sizes are available on request. You will need to buy extensions and setting rings separately.

Measuring depth extensions

 

Measuring depth is limited depending on the size of the gage, but up to 2 additional depth extensions can be installed. Installing more than 2 extensions will probably hamper anvil retraction, especially when used in a vertical position, and is not recommended.

for gage size

Depth extension

Order Number

Your Price USD

.188 through .4"

4 inches*

78.103613

check price and stock

.4 through .8"

6 inches

78.103621

check price and stock

.8 through 1.6"

6 inches

78.103624

check price and stock

1.6 through 4"

6 inches

78.104940

check price and stock

 

* Important note: the 4" extensions have a diameter of .350" This limits the depth of bore measurement when the bore diameter is smaller than .350"

 

How to read the vernier on your Ingage

 

When reading the inch scale on the barrel, the larger lines represent .001" and the shorter lines represent .0005"

On the vernier you will see the numbers 0-1-2-3-4-5 which are used to read .0001" immediately after one of the long lines. If the zero has passed the short line, however, these numbers are interpreted as 5-6-7-8-9.

Spending a few minutes with your gage and these instructions will make everything self evident.


 

How to calibrate the Etalon ingage

 

The amount of torque applied on the friction thimble greatly affects the readings. To minimize variation, the person who uses the gage should also be the person who calibrates the gage. Two different users are likely to get two different results.

It is a simple matter to use two setting rings: one for the top range of the ingage and one for the lowest range. Simply take a measurement and the readings on the ingage should equal the size of the setting ring.

If the gage is used for only one particular measurement, then you can use a setting ring of that size to verify accuracy.

There are no adjustments that can be made to the gage if these values are off.

 

Q&A

 

Q: My customer is complaining about the range of model 78.112375. Do you know what the minimum and maximum range are? To me it seems like aprox .240" to .260" The foot stops at about .267" but my customer thinks its supposed to go to .275"?

A: These gages were originally designed for metric measurement. This particular model has a range of 6 mm to 7 mm. When you convert this to inches you will get about .236" to .276". The catalog lists the range as .233" to .278". Unfortunately the scale on the thimble is misleading since the graduations appear to start at .240" and end at .260".

 




The above items constitute advertisements on behalf of Amazon.com and are not to be construed as endorsements by Long Island Indicator Service. We strongly believe in buying quality tools and gages, and urge customers to check carefully before making a purchase. If the prices appear unusually low, we suggest proceeding with caution.

 

from our bookshelf

The Companion Reference Book on Dial and Test Indicators … page 178
BesTest and TesaTast Indicator Repair Manual … page 177
Starrett 711 Last Word Indicator Repair Manual … page 199
Interapid Indicator Repair Manual … page 208
Compac Test Indicator Repair Manual … page 194
Mitutoyo Test Indicator Repair Manual … page 102
 

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14 Sarah Drive — Hauppauge NY 11788 — USA


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This page's most recent revision: 9 MAY 2017
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Original photographs and content copyright 2017 by JWGrum

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