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Dorsey Standard Bore Gage

dial bore gage - NEW and improved – made in USA
Style 1
for bore diameters up to 24"

Dorsey Metrology and Dorsey dial bore gages are probably your best choice for the following reasons:

  • they are manufactured and assembled in the USA
  • there are a great many optional configurations available for each model
  • if you need customized gages, they can be made in a matter of a few weeks
  • if you have special requirements, Dorsey can suggest a solution for you
  • if you need replacement parts, they are readily available
  • if there is a warranty issue it can be quickly resolved without overseas complications
  • if you need repair service, it is available from independent repair shops as well as Dorsey itself
  • Dorsey Metrology is a really nice company to work with. They won't let you down.
  • did we mention that they are made in the USA?

What are the Standard Bore Gage styles?

  • Style 1: standard format shown on this page
  • Style 2: right angle, for jig boring and other applications
  • Style 3: vertical, for vertical axis bores at eye level, ideal for bench inspection
  • Style 4: perpendicular, for vertical axis bores which are below eye level
  • Style 5: pistol grip, for applications with limited access
  • Style 7: flush mount, for applications with limited access

Whatever happened to Standard Gage dial bore gages?

Until 2002 Standard Gage dial bore gages were manufactured in Poughkeepsie, New York. They made several different bore gage configurations at that time (perpendicular and vertical for example).

Subsequently, Standard Gage dial bore gages were purchases by Brown & Sharpe and were made in Switzerland but these were discontinued as of February 2015.

For the time being, spare parts and repairs are still available for these older models through Long Island Indicator Service.

As a perfect replacement, you can opt to purchase the Dorsey Standard bore gage made in USA.

Dorsey dial bore gages have identical measuring heads but the dial indicator will carry the name Dorsey (see below). In all other respects, these bore gages are the same as the old Made-in-Poughkeepsie models. (For reference, the Mitutoyo dial bore gage series 545 is a close look-alike but parts will not be interchangeable.)

  • Digital versions are also available with the option of converting your dial bore gage into a digital electronic gage.
  • See our page 8 for a comparison with other brands of dial bore gages.
  • Metric dial bore gages are also available.
  • Optional carbide, nylon and diamond contacts are now available. See parts on page 72.

In order to keep prices down, most of these gages now ship in a simple styrofoam box. However, sturdy wood storage boxes are available for special orders such as bore gages with long depth extensions and for the combi-kits. Wood boxes can also be purchased as an option (see bottom of this page).

 

StandardNo5

Made-in-USA Dorsey Standard Bore Gage model No.5 is shown above with single revolution indicator.

Note that many of our Standard Bore Gages feature extended ranges, beyond those offered in regular catalogs.

The Centralizing Plungers automatically locate the gaging contacts on the bore diameter even when the gage is inserted at an angle.

Dial indicator graduations are .0001" or 0.002 mm and each model comes complete with all range extensions and adapters. The gaging depth shown is the maximum depth without depth extensions (available separately). Setting rings are not included, nor are they required.

Dorsey Standard bore gages have dials with convenient revolution counters or standard single revolution dials which can reduce confusion about readings. These versions are made in USA and are designated with the prefix DS in the price chart below.

  • All bore gages size 2 through 6 come standard with steel contacts. The gaging contacts and/or the centralizing contacts are also available in carbide, Delron® nylon or diamond in some cases.
  • Gages ship in styro packaging unless they have extended lengths, in which case no packaging is included. Wooden storage cases are sold optionally for Size 2 and larger.
  • Repair service is available from Long Island Indicator Service or directly from the manufacturer for customized gages. Repair parts are easily obtained. Refer to page 72.
  • Standard No.0 dial bore gages are no longer available.
  • Storage boxes are not included. Wooden storage boxes are optional. See information below.
  • Additional gaging depths up to 36" are available for Models 2 through 6. Inquire about pricing.
  • Instructions for use


 

Dorsey Part no. (2)

Model (6)

.0001"
Indicator (3)

Contacts (1)

Gaging Depth (4)

Range (5)

Your Price (USD)

DS-B1-11101

1

one rev

steel/steel

.63–1.00"

781.00

DS-B1-12101

1

multi rev

steel/steel

.63–1.00"

789.00

DS-B1-11102

2

one rev

steel/steel

5"

1.00-1.53

707.00

DS-B1-12102

2

multi rev

steel/steel

5"

1.00-1.53

715.00

DS-B1-12102-10

2

multi rev

steel/steel

10"

1.00-1.53

819.00

DS-B1-11103

3

one rev

steel/steel

5"

1.50-2.16

729.00

DS-B1-12103

3

multi rev

steel/steel

5"

1.50-2.16

737.00

DS-B1-12103-10

3

multi rev

steel/steel

10"

1.50-2.16

841.00

DS-B1-11104

4

one rev

steel/steel

5"

2.12-3.13

742.00

DS-B1-12104

4

multi rev

steel/steel

5"

2.12-3.13

750.00

DS-B1-12104-10

4

multi rev

steel/steel

10"

2.12-3.13

854.00

DS-B1-11105

5

one rev

steel/steel

6"

3.08-6.13

797.00

DS-B1-12105

5

multi rev

steel/steel

6"

3.08-6.13

805.00

DS-B1-12105-12

5

multi rev

steel/steel

12"

3.08-6.13

915.00

DS-B1-12106

6

multi rev

steel/steel

6"

6.0-12.13

1047.00

DS-B1-12106-12

6

multi rev

steel/steel

12"

6.0-12.13

1157.00

DS-B1-11106

6

one rev

steel/steel

6"

6.0-12.13

1039.00

DS-B1-11106-12

6

one rev

steel/steel

12"

6.0-12.13

1149.00

(1) gaging contact and centralizing contact (also available in combinations of nylon, carbide and diamond) contact us for details

(2) You may order online by selecting any linked part number. Other models are also available.

(3) Some of these bore gages are available with single revolution dials which eliminates confusion about accuracy and reading errors or with mutliple (usually 3 revolutions) on the dial. You also have the option of .0005" or .0001" dials, although the .0001" are considered standard in all but the largest gages. Dorsey makes many options available, just ask if you don't see what you need.

(4) Other gaging depths are available up to 144 inches for some models. Most extra long gaging depth bore gages, such as those used by extruding facilities, are not in stock and may require 4-8 weeks for delivery.

(5) Some ranges can be extended with "Range Extensions" (see below)

(6) Model refers to gage size (measuring range) and is printed on the back cover of the bore gage.

Metric sizes are available on page 157.
 

1-8" Combination Offer

 

Model 2, 3, 4, and 5 combination kit: you will receive one .0001" indicator, four interchangeable measuring heads with steel contacts (from 1.0" to 8") and all the necessary extensions and wrenches, complete in a wooden case. This set will not include any additional depth extensions.

  • With steel contacts (made in USA) order no. DS-B1-K2345 ... $2,120.00 (2017 pricing)

Replacement Dial Indicator Unit

 

The unit consists of the Dorsey .0001" dial indicator, its housing and the holding handle. The measuring unit simply slips into this dial indicator unit and is held in place with a set screw. For details see page 124.

 

Depth Extensions

 

Bore gage depth can be specified when the gage is purchased. Alternate depth extensions are available for bore gage model 2, 3, 4, 5 and 6. The depth which these bore gages can reach is called the "A" length and this length is available from 4" to 36" in various intervals, and as much as 72" on special request. However, we would be disinclined to rely on the accuracy of anything over 36". Please inquire about pricing and delivery. Extensions are not available for model 0 and model 1. Think about it: a very thin tubular extension of any significant size—never mind 36"—would never work accurately.

You will not be able to combine depth extensions. You can not, for instance, combine two 10" extensions in the hope of getting a 20" reach.

Extensions can also be purchased at a later time. Although, bought separately, they cost twice as much. The extension replaces the entire middle portion of the bore gage. You will have to insert it between the dial indicator and the measuring head. For example: a 10" extension, although only 9" long will give you a usable measuring depth of 10" when installed. Installation is self evident and not complicated. If you wish to purchase separate extensions, refer to the parts list.

Be advised that bore gages with added depth extensions will probably not function properly in the horizontal position. The weight of the long rod will bend the barrel and sluggishness or jamming will result. If you need to use the bore gage in a horizontal position, let us know in advance so we can advise the manufacturer who will make some factory adjustments (allow extra time).


 

Can you switch various depth extensions?

 

It's easy. There are 5 screws to deal with. The set screw at the indicator end. Remove it (don't lose it). The indicator comes off. There are 4 longish screws at the measuring end. This removes the extension housing assembly from the measuring end. Now replace this with the longer, or shorter extension housing. There's no trick in putting it back except that you want to make sure the lever in the measuring head is properly aligned. See the parts list for available extensions.

 

Contact Points (plungers)

 

Each bore gage comes with a steel gaging plunger and steel centralizing plungers as shown below. Other combinations of carbide and diamond, or Delron are also available for sizes 2 through 6.

Unfortunately, size 1 is only available with steel contacts. Diamond and carbide have been discontinued for these.

 

Range extensions

 

Each bore gage comes complete with all necessary range extensions. The range refers to the diameter of the bore to be measured. You may, however, wish to buy them individually to replace damaged or lost pieces. A locknut keeps them securely in place. In some models, two wrenches are required to tighten the extension and locknut. In models size 2 and larger, a separate contact point is screwed into the range extension. This contact point is available in steel, carbide or diamond. Refer to specific models in the spare parts lists.

Refer to the range extension chart on page 13 to determine which extension to use for the diameters being measured.

You can also buy a range extension extender. We kid you not. Bore gage sizes 5 and 6 can have their ranges extended further with a "range extender". These extenders will allow you to go beyond the normal ranges of these bore gages.

For model

Extra range

Part number

Price

Size 5*

from 6.13" to 8"

B0-85952

see page 156

Size 6**

from 12.13" to 24.56"

B0-85966

see page 156

 

*The extra range extension for Size 5 consists of 1 hex extension which brings your measurable range to 8" total.

**The extra range extensions for Size 6 consists of 6 pieces: three 4 inch hex extensions (when combined, they add up to 12" in range), two 1 inch centralizer extensions, and one contact extension.

Is it possible to combine extensions?

 

Yes, on the range extensions. No, on the depth extensions.

 

Accuracy of dial bore gages

 

Dial bore gages only need to be accurate over a few thousandths of linear travel, since that is all that will ever be used for measurement. However some big companies, which should know better, insist on calibrating more than one revolution. These Dorsey bore gages have very accurate dial movements and the tolerances on the bore gage bell crank have been substantially tightened in recent years. It is not uncommon for a .0001" dial bore gage to be accurate within one graduation over all three revolutions, although this is not a published accuracy.

Here is what you can reasonably expect according to Dorsey Metrology International:

  • ± one graduation in the first revolution
  • ± two graduations in the second revolution
  • ± three graduations in the third revolution

For details on bore gage calibration see page 7.

For a convenient way to set your bore gage dimensions see page 147.

 

Spare Parts

 

Refer to Standard Gage dial bore gage parts lists on page 72.

 

Standard bore gage repair

 

Long Island Indicator Service is an authorized repair service, fully qualified to perform professional repairs on Standard Gage and Dorsey dial bore gages. See page 30 for details.

 

Standard bore gage wood storage box

 

Standard and Dorsey bore gages ship in styrofoam storage boxes. This keeps the cost down. While the styrofoam boxes are perfectly suitable for shipping and storage of the bore gage, they may not be the most aesthetically pleasing and they are probably not durable enough for the long term. You may want to order a wooden storage case for your new bore gage or you may want to get a new box for the bore gages you already have.

One important detail: these boxes are only suitable for the regular bore gage without any special length extensions. If you have a 36" long bore gage, for instance, it simply won't fit.

  • Standard No.2 box ... DX2-89952 ... $155
  • Standard No.3 box ... DX2-89953 ... $155
  • Standard No.4 box ... DX2-89954 ... $155
  • Standard No.5 box ... DX2-89985 ... $155
  • Standard No.6 box ... DX2-89986 ... $155
  • Wood storage boxes for over-sized (extra length) bore gages … inquire
     

Q&A

 

Q: We have had the combi-kit K2345 on order since 01/15 and Brown and Sharpe cannot seem to be able to get it shipped. Can you help?

  • These are in fact discontinued and that would explain why B&S isn’t shipping. They may have forgotten to tell you that little detail. We can supply you with the equivalent kit but made in the USA by Dorsey Metrology. The gaging heads are identical to those made by Standard. The difference is in the name on the dial indicator. The price is shown above and delivery should not be more than 3 weeks.

Q: Could you tell me if a Sunnen setting fixture can be used to set a Standard brand bore gauge?

  • A: Although we have never tried this ourselves, I don't see why this wouldn't work.

Q: I have a No.2 bore gage and a couple of # 3 and # 4 bore gages that the lens won’t stay in. Also the spring that goes over the plunger is missing in some. The plunger sticks at times as well. Could you recommend a solution to use that will clean the internal components and help keep them from sticking?

  • There are several different indicators in use and each has a different crystal (lens). We would need more information such as the indicator model number (printed on the dial face). Springs are spare parts which can be found by going to page 72. For cleaning we suggest Naphta. Alcohol may also work in some cases. You could use a water-based cleaner but if you do, be sure to dry thoroughly to avoid rusting. Ideally you would dismantle the entire bore gage head for cleaning.

Q: I have a Sandard Bore Gauge No.5 with the full set of range extensions, and a #2 with no range extensions.  Are all extenders the same across the range of #2 - #6?  Is there any problem using the extensions I have from #5, up to about 2 inches, in the #2?

  • Extensions are of various lengths depending on the model (No.2, No.6). You can see a listing of these extensions on page 013 : Standard Bore Gage extension chart. If the thread fits, there is no reason you can’t use other lengths. In fact, you could even manufacture custom lengths for specific applications.

     



 



 

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LONG ISLAND INDICATOR REPAIR MANUALS

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Interapid Indicator Repair Manual … page 208
Compac Test Indicator Repair Manual … page 194
Mitutoyo Test Indicator Repair Manual … page 102
 

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This page's most recent revision: 24 MAY 2017
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Original photographs and content copyright 2017 by JWGrum

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