Interapid test indicator
spare parts – repair parts – for reference only

interapiddwg1
interapidmovementdwg

Note: the drawings above are for the Interapid .0001" horizontal models. The parts for the .0005" indicator and the vertical models may have a slightly different appearance. Order parts for all models from the list below.

For additional parts drawings, please refer to our Interapid Indicator Repair Manual

Test indicators with .001" graduations such as model 312B-20 and 312B-20V will take the same parts as the .0005" indicators. Brown & Sharpe model 7025-4 is the same as Interapid 312B-1.

Model 312B-15 and 312B-15V will take the same movement parts as the other .0001" models. The return lever is different and unique. Check the parts list carefully if ordering for these.

Professional repair service for the Swiss-made Interapid indicators is available from Long Island Indicator if you'd rather have us take a look. See page 30 for details.

Except for contact points spare parts for the Interapid test indicators are no longer available from us. If you need other parts, please contact the manufacturer for assistance.

0

plastic box for 312B-15 and 312B-15V models

106461

0

plastic insert for 106461

112324

0

plastic storage box (not suitable for 312B-15 or 312B-15V)

111473

1

body 312B-1, 312B-2, 312B-20

111360

1

body 312B-3, 312B-4, 312B-15

111361

1

body 312B-1V, 312B-2V, 312B-20V

107480

1

body 312B-3V, 312B-4V, 312B-15V

111949

3

outer dial 0-40-0 (1.5" diameter) 0,01 mm

026420

3

outer dial 0-10-0 (1.5" diameter) 0,002 mm

026421

3

outer dial 0-10-0 (1" diameter) 0,002 mm

026425

3

outer dial 0-4-0 (1.5" diameter) .0001"

026423

3

outer dial 0-15-0 (1" diameter) .001"

026428

3

outer dial 0-15-0 (1" diameter) .0005"

026426

3

outer dial 0-15-0 (1.5" diameter) .0005"

026422

4

screw for dial (see note below)

105912

5

hand, revolution counter

108205

6

hand for 1" dial

108045

6

hand for 1.5" dial

108046

7

contact point lever .0001” (see notes)

110547

7

contact point lever .0005” (see notes)

110614

8

rack lever .0001” (and -15, -15V models)

110518

8

rack lever .0005”

110610

9

return lever .0001”

123083

9

return lever .0005”

123084

9

return lever for 312B-15 and 312B-15V

123101

10

ball bearing with spanner nut

109941

11

spanner nut (see notes)

123073

12

carbide contact points see page 21

13

pivot

105925

14

screw for dovetail

106289

15

dovetail large

106288

16

dovetail small

106287

17

screw, travel limit

111326

18

stem attachment screw (A) see notes below

111318

19

stem attachment nylon (B) see notes below

111319

20

stem attachment ø 4 mm (C) see notes below

111317

8 mm adapter (fits over 4mm stem) #74.108942

74.108942

3/8” adapter (fits over 4mm stem) #74.108943

74.108943

28.00

21

stem attachment washer (D) see notes below

106034

22

stem attachment bushing (E) see notes below

110666

23

movement fastening screw (one piece)

105908

24

bezel with crystal installed (1”)
for models ending -2 -20 -4 -2V -20V

123079

24

bezel with crystal installed (1.5”)
for models ending -1 -3 -15 -1V -3V -15V

123080

24

bezel only, small (1”) not available

110477

24

bezel only, large (1.5”) not available

110479

25

crystal only, small bezel size 1”
for models ending -2 -20 -4 -2V -20V

105967

25

crystal only, large bezel size 1.5” (plastic Ø 36.0 mm convex)
for models ending -1 -3 -15 -1V -3V -15V

105968

27

extension ring for large bezel

110300

28

complete movement for B-1, B-2, B-20, B-1V, B-20V, B-2V

111904

28

complete movement for B-3, B-4, B-3V

111905

28

complete movement for B-15 and B-15V (allow 4-6 weeks)

026077

29

contact point wrench (18.60307)

18.60307

30

dial 312-1 insert

026403

30

dial 312-3 insert

026404

30

dial 312B-1 insert (use with dial ring 026422)

026409

30

dial 312B-3 insert

026410

30

dial 312B-2 insert

026411

30

dial 312B-20 insert

026413

30

dial 312B-3v insert

026414

30

dial 312B-1v insert

026415

30

dial 312B-2v insert

026416

30

dial 312B-15 insert

026418

30

dial 312B-15v insert

026419

30

upper movement plate (top plate with jewel bearings) 0,002 mm .0001"

123093

30

upper movement plate (top plate with brass bearings) 0,01 mm .0005"

123085

31

center pinion for 312-1, 312-2, 312-1V and 312-2V

123089

31

center pinion for 312B-1, 312B-2, 312B-20, 312B-1V, 312B-2V, 312B-20V

123089

31

center pinion for 312-3, 312-4, 312B-3, 312B-4 and 312B-3V

123097

31

center pinion for 312B-15 and 312B-15V

123097

32

bearing .0005” bottom

123088

32

jewel .0001” bottom

123096

33

hair spring gear .0005”

123091

33

hair spring gear .0001”

123099

33

hair spring gear for 312B-15 and 312B-15V (see notes)

123099

34

bezel friction spring

123082

35

lower movement plate for .0005" and .001" models

123086

35

lower movement plate for .0001" and 312B-15 and 312B-15V

123094

36

bearing .0005” top

123090

36

jewel .0001” top

123098

37

peg for hair spring

123078

38

upper movement plate screw

123076

40

crown gear for 312-1, 312-2, 312-1V and 312-2V

123087

40

crown gear for 312B-1, 312B-2, 312B-20, 312B-1V, 312B-2V, 312B-20V

123087

40

crown gear for 312-3, 312-4, 312B-3, 312B-4 and 312B-3V

123095

40

crown gear for 312B-15 and 312B-15V

123095

41

mounting ring with threads (bezel attaching inner ring)

123081

42

hair spring .0005”

123092

42

hair spring .0001”

123100

42

hair spring for 312B-15 and 312B-15v

123242

43

screw for crown gear bearing

123075

44

crown gear bearing

123074

Notes

 

InterapidIndicatorRepairManual

Additional repair hints and instructions can be found in the Interapid Indicator Repair Manual on page 208.

A selection of repair tools used by professionals for assembling the Interapid indicator are shown on page 31.

What are the most frequently used repair parts for Interapid test indicators? We have been asked this question by start-up repair shops and in-house repair departments. Here are the most frequently used parts which should be in their inventory:

  • crystal
  • contact point
  • mounting stem 111317
  • ball bearing spanner nut 123073
  • pivot 105925
  • movement screw 105908
  • hair spring (both .0005" and .0001")
  • rack lever for .0005" models
  • dial screw
  • ball bearing

Dials: Up until recently, these dials were made of metal. Nice sturdy things, cleanly printed. New models (since 2014) have replaced these with a bright white plastic dial, still nicely printed. They are a bit thinner. But be careful: cleaning solvents may affect the plastic. Naphtha does not dissolve the plastic, but it will cause the plastic to warp if you don't dry it off promptly. Better to use a water-based cleaner if you need to soak the dials.

Screw for dial: under some conditions these little screws have an annoying habit of unscrewing themselves as a result of vibrations. Don't take it personally if this happens to you. We suggest you tighten the screws on a regular basis—perhaps each time you calibrate the indicator—so that they won't fall out and jam up the works. It's a little bit like tightening those screws on your eyeglass frames, before they fall out—probably while you're on vacation somewhere. (The manufacturer solved this problem in new models made in 2014 by simply gluing these small dial screws in place. This can make it very hard to remove them during a repair. We suggest NOT trying to remove them if the movement does not need to be disassembled.)

Horseshoe Clips used on the old Interapid 310 and 311 series indicators can be purchased from Mr. Wayne Root who has manufactured a supply of these. They are available on E-Bay by clicking here.

FYI: Ball Bearing tap size M4x0.35

Up and down pressure on the contact point should be about even. This is the function of the return lever (drawing #9) and the shape of the spring. For ideal performance, the shape of this spring should mimic that of a brand new part. Often times, this spring gets bent out of shape when it is removed during a repair attempt. Refer to our repair manual for illustrations.

Crystal replacement: Interapid crystals are not user replaceable. They require a crystal press for insertion. The crystals are flat or just slightly convex, slightly over-sized and must be inserted with a crystal press. The crystal press will make them dome-shaped and this is what keeps the crystals in place. You can opt to purchase the bezel with crystal already installed (see parts list above) so that you simply remove the old bezel and screw on the new bezel with the new crystal, or you can send us the indicator with instructions to replace the crystal only. The cost is $37.

Removing the bezel: The bezel is threaded and unscrews. Hold the lower bezel plate steady with a small screw driver or pin, placed in one of the two holes, while you unscrew the bezel (see details below).

Stem attachment: If the mounting stem is bent or broken you can replace it with a bit of care. When you remove the old stem, don't lose the other parts. Unscrew #18, remove #19, tap out the bushing #22, save the washer#21 (which goes on the inside), then remove stem 111317. Reassemble in reverse order. Take a look at this short video to see how it's done.

 

 

oldsytlestem
Be advised that we only sell the new style stem attachment. Old style stem attachments, pre-1965, are no longer available.

The old style, shown in the photo to the left, had an adjusting screw built into the stem and had a 4 mm diameter chrome pin running through the sides. It did not have the components shown in the drawing above.

It will not be possible to install the new style stem into the old model bodies.
 


 

How to tighten a loose bezel

bezeltightening
The bezel is screwed on, as you have probably noticed.

Take a look under the rim and you will see two holes. Insert a rod, a pin, a screw driver, something small into one of the holes. This will keep the plate from rotating while you turn the bezel and now you can tighten it again, by hand.

If you have the small diameter bezel, there won't be any holes but there will be two slots (you can also see this slot in the enclosed photo). The slots serve the same purpose for the small diameter indicators (but not for the large diameter).

 


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.
 

 

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: 12 November 2018
All Rights Reserved

Original photographs and content copyright 2018 by JWGrum

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