page 83

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Compac dial bore gage parts list
Model IA3A (2 to 6") and IA4A (2 to 12") measuring heads.

 

These are the same parts used by Interapid, Alina and SPI models 20-019-6, 20-021-2, 20-018-8, and 20-020-4 dial bore gages made in Switzerland.

The parts for the dial indicator used with this bore gage are shown on a separate list. See page 84.

 



Parts can be ordered online when prices are shown. You will have to email us for information on parts without pricing.

All parts are made in Switzerland unless otherwise noted.

Dwg

Order Part no.

US$

2-12" measuring head with box and all plugs (see info)

IA4A

2-6" measuring head with box and all plugs (see info)

IA3A

kit transforms 2-6" into 2-12"

IA-34

0

wooden box for 2-6" and 2-12" (on request)

042389

1

measuring head only (allow 4-6 months for delivery)

044123

2163.00

5

set screw (5 mm long)

041978

18.80

6

vertical rack

041893

7

flat contact

042139

8

spring

041894

9

centering washer

041895

10

guide ø1,95

042035

11

horizontal rack (specify size from 3.65 to 3.77)

041896

12

lower guide

041897

15

sliding contact

044125

16

protection plug

041898

17

bearing holder with bushing 042034 installed

044126

18

screw for cover

041977

19

brass bushing for 044126

042034

20

pinion

042041

21

screw (cone head)

043197

22

see drawing part 29

23

extension O

044127

24

extension A

041900

59.00

24

extension B

041901

89.00

25

contact #1 (plug) length .5" approx.

044128

463.00

25

contact #2 (plug) length .75" approx.

044129

25

contact #3 (plug)

044130

25

contact #4 (plug)

044131

25

contact #5 (plug)

044132

chart for plug and extension combinations (see below)

041910

27

clamp (unfinished; see information below)

040406

92.00

28

nut for #040406

041903

59.00

29

centering sled (carbide) for 2-6"

044134

29

centering sled (steel) for 2-6"

044133

31

screw for centering sled

041906

25.00

32

spring for centering sled

041907

33

wrench for contacts (made in Germany)

042066

34

contact holder only

041908

34

holder with 5 contacts

044136

37

tube (4/IA.3-37) not shown

38

rod (2/IA.3-38) for tube #37 not shown

041912

40

round (lower) contact for rod #38 not shown

042140

41

flat (upper) contact (2/NC.4-7) for rod #38 not shown

42

depth extension (100 mm)

RI-100

50

extension C with screw for 2-12"

044138

51

screw for 2-12" #044138

041914

52

extension D for 2-12"

041915

53

centering sled (carbide) for 2-12"

044140

53

centering sled (steel) for 2-12"

044139

Compac bore gage clamp important information

boregageclamp83

The square shaped clamp on the 2-6" and 2-12" bore gage models which hold the extensions in place is part #040406 (see drawing item 27). This clamp is sent unfinished, which means it doesn't have an inside thread. The reason is: the thread needs to be custom cut to match the thread already in your gage head.

If you want to do it yourself, you'll need a metric M12x1 tap. Remove the old clamp, put the unfinished clamp in place and using the thread of the bore gage head as a guide, insert the tap, cutting a thread into the clamp. Of course, if you prefer, we can install this for you. 


 

Centering sled

 

A new centering sled is not necessarily easy to install. It looks like it should simply slide into the two holes but chances are that the posts won't be aligned and your sled will jam. Don't force anything and for heaven's sake don't try to bend the posts. They'll snap off. These sleds are custom fit on new gages and that's why you'll run into trouble trying to replace them. If the fit is tight, try a bit of emery and see if that works. Check that there are no burrs. Advance carefully and you'll probably succeed. The other, and better option, is to send it to us for installation.

Diameter in inches

Plug No.

with extension A

with extension B

with ext C+A

with ext C+B

with ext C+D

0

2" to 2.4"

1

2.4" to 2.8"

4.4" to 4.8"

6.4" to 6.8"

8.4" to 8.8"

10.4" to 10.8"

2

2.8" to 3.2"

4.8" to 5.2"

6.8" to 7.2"

8.8" to 9.2"

10.8" to 11.2"

3

3.2" to 3.6"

5.2" to 5.6"

7.2" to 7.6"

9.2" to 9.6"

11.2" to 11.6"

4

3.6" to 4"

5.6" to 6"

7.6" to 8"

9.6" to 10"

11.6" to 12"

5

4" to 4.4"

6" to 6.4"

8" to 8.4"

10" to 10.4"

12" to 12.4"

The chart above shows the various combinations of plugs (contacts) and extensions which will give you the measuring ranges for both 2" to 6" and 2" to 12" models. A similar chart is supplied in the box of new inch-reading bore gages.



 

 

From our reference shelf:

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
 

www.longislandindicator.com

Long Island Indicator Service Inc
14 Sarah Drive — Hauppauge NY 11788 — USA


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This page's most recent revision: 4 NOVEMBER 2016
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Original photographs and content copyright 2016 by René Urs Meyer

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