Compac IA2A
Swiss made dial bore gage — parts list

 

Model IA2A (.8 to 2.0") and model IA2 (20 to 50 mm) measuring heads.

These are the same parts used by Interapid, Alina and SPI 20-017-0 and 20-016-2 dial bore gages made in Switzerland.

New Compac dial bore gages can only be bought in complete sets. The measuring head and indicator can no longer be bought separately. They will be made to order and may require more than six months for delivery. Information on complete Compac, Interapid, SPI and Alina bore gage sets can be found at page 39.

Indicator parts are listed separately. All parts are made in Switzerland unless otherwise noted. Information on complete Compac, Interapid, SPI and Alina bore gage sets can be found at page 39.

If repairs are required, you are welcome to send them to us. For information on Compac bore gage repair service, see page 30.

This page is for reference only. Spare parts are no longer available for sale from us while we conserve stock needed for repairs.
 

Dwg

Part no.

.8-2.0" measuring head with box and all plugs (see page 39)

IA2A

20-50 mm measuring head with box and plugs

IA2

.0001" dial indicator for bore gage (see page 39)

IAP555A

0

wooden box for .8-2.0”

042388

1

IA2A measuring head assembled .8"-2" (not always in stock)

044100

4

vertical rack

041868

5

flat contact

042139

6

guide ø1,95

042035

7

centering washer

041869

8

spring

041870

9

bushing

044102

10

bushing

044103

11

screw for cover

041977

12

brass bushing

042034

13

pinion

042041

14

horizontal rack

044104

16

conical pin

042011

17

blue plate

042059

18

threaded bushing

041872

19

contact #1 (1,5 mm) for metric models

044105

19

contact #2 (2,5 mm) for metric models

044106

19

contact #3 (3,5 mm) for metric models

044107

19

contact #4 (4,5 mm) for metric models

044108

19

contact #5 (5,5 mm) for metric models

044109

19

contact #6 (6,5 mm) for metric models

044110

19

contact #1 (.80")

044111

19

contact #2 (.84")

044112

19

contact #3 (.88")

044113

19

contact #4 (.92")

044114

19

contact #5 (.96")

044115

19

contact #6 (1.00")

044116

22

extension A (.20")

041876

22

extension B (.40")

041877

22

extension C (.80")

041878

22

extension A (5 mm) for metric models

041873

22

extension B (10 mm) for metric models

041874

22

extension C (20 mm) for metric models

041875

24

nut

041879

26

spring (one piece, two are required)

041880

27

adjusting wrench for screw 041881 (0.9 mm)

041881A

27

screw

041881

28

centering sled (steel)

044117

28

centering sled (carbide)

044118

29

depth stop attachment, short

IA2-29

30

depth stop attachment, long

IA2-30

31

knurled button for depth stop

IA2-31

32

contact holder (inch and metric)

044120

32

contact holder with inch contacts and 3 extensions

044121

32

contact holder with metric contacts and 3 extensions

044119

34

measurement chart (inch)

041889

35

wrench for contacts (made in Germany)

042066

4" depth extension (no longer available)

RI-100

Stripped threads

 

The contacts for this size bore gage have M5x0.5 threads. Overtightening the contacts will easily strip the threads in the measuring head. If the threads become stripped, you'll have no choice but to replace the entire head (part 044100).

 

About contact sizes

 

The nominal size and the actual length of the six contacts is different. If you're missing a contact or need to replace a worn contact, it can be tricky to figure out which one you need. To make it easier, here are the actual overall lengths of the new contacts. Keep in mind that the contacts you have may be worn down and thus a little bit shorter than the new ones.

  • No.1 (.80") = .206" approx. overall length
  • No.2 (.84") = .248" approx.
  • No.3 (.88") = .295" approx.
  • No.4 (.92") = .327" approx.
  • No.5 (.96") = .370" approx.
  • No.6 (1.00") = .405" approx.

If you have the contacts screwed into the circular contact holder that came with the bore gage set, here are the dimensions of the exposed length of each contact.

  • No.1 = .060" exposed length
  • No.2 = .110"
  • No.3 = .150"
  • No.4 = .190"
  • No.5 = .230"
  • No.6 = .270"

     

Compac bore gage repair

 

Professional repair service is available for all Compac, Interapid, Alina and SPI (Swiss) dial bore gages. Please refer to page 30 for details.

 



 

 

LONG ISLAND INDICATOR REPAIR MANUALS

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

New! Companion Reference Guide for Test Indicators … page 178
 

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: 17 December 2018
All Rights Reserved

Original photographs and content copyright 2018 by JWGrum

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