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Starrett dial caliper series 120 and 120A
Spare parts list for 6", 9" and 12" Starrett dial calipers


Starrett 120A-6 Dial Caliper, 0-6" Range

We are a land of do-it-yourselfers. If you want to give caliper repair a try yourself, here are some of the spare parts you may need. And remember: we don't cry if we fail.

For some instructions and tips on repairs of these dial calipers, please take a look at page 44.

Important: some parts are different for the old (120) and the new (120A) dial calipers. Pay particular attention to the presence or absence of the alphabetic character after the model number. You'll find the model number stamped on the front end of the calipers. The letter "A" will tell you that you have a new style model. Understandably, some parts are different for the 6-inch, 9-inch and the 12-inch models as well.

LSS120dwg2

A BIG word of caution! These parts will only work with the American made model 120 and 120A calipers. They will not fit the Starrett 1202 calipers made in China. But, you already knew that.

PT27366

PT27366 (Item #27 in the drawing) is the black plastic end stop. It has two plastic pegs which get pushed into the openings on the beam. If you need to slide the beams apart, you will have to remove this plastic stop. If the old stop broke off, you will first have to remove the plastic stumps which may still be in the beam. The 12" models use a different, larger end stop. See below.



 

Dwg no.

Order no.

Starrett 6", 9" and 12" models

120-6"
old

120A-6" new

120A-9" new

120-12" new

Price

2

PT19021

slide gib spring

X

X

X

6.50

buy

2

PT22156

slide gib spring 12"

X

[?]

3

PT22157

slide gib

X

X

X

[?]

3

PT19022

slide gib

X

[?]

4

PT19023

rear gib screw

X

X

X

X

13.30

buy

5

PT19214

front gib screw

X

X

X

X

[?]

6

PT19020

thumb roller

X

X

X

[?]

6

PT22154

hook for thumb roller 12"

X

[?]

6

PT22155

thumb roller 12"

X

[?]

7

PT19024

slide lock screw

X

X

X

X

13.10

buy

8

PT22262

rack

X

[?]

9

PT19051

rack screw

X

X

X

8.00

buy

9

PT10956

rack screw 12"

X

[?]

11

PT06839

indicator case screw

X

X

X

X

[?]

12

PT10956

plate cover screw

X

X

X

X

[?]

13

PT19029

depth rod

X

X

[?]

13

PT23806

depth rod 9"

X

[?]

14

PT07061

depth rod screw

X

X

X

[?]

15

PT22080

bracket

X

X

X

[?]

15

PT19032

bracket

X

[?]

16

PT99412

anti-backlash gear

X

X

X

29.85

buy

17

PT22267

hand pinion

X

X

X

15.45

buy

18

PT22164

bridge

X

X

X

[?]

18

PT19037

bridge

X

[?]

19

PT05465

bridge screw (gear end)

X

X

X

X

[?]

20

PT05465

bridge screw

X

X

X

X

[?]

21

PT23534

bezel o-ring

X

X

X

X

[?]

22

PT19040

dial friction spring

X

X

X

X

[?]

23

PT19041

dial (Starrett .001" American Made)

X

X

X

X

13.80

buy

24

PT19035

hand (pointer)

X

X

X

X

13.10

buy

25

PT99455

bezel with crystal installed

X

X

X

X

23.10

buy

26

PT19043

crystal only (#380) see important note

X

X

X

X

6.60

buy

27

PT27366

slide stop (old #19045)

X

X

X

12.80

buy

27

PT22168

slide stop 12"

X

13.10

buy

28

PT19046

bezel lock clamp

X

X

X

13.10

buy

28

PT22165

bezel lock clamp 12"

X

12.35

buy

29

PT19047

bezel lock screw

X

X

X

X

8.00

buy

30

PT19039

wire bezel ring for old style bezels

X

9.60

buy

storage case / box (see below)


 

Notes: the bezel is now plastic and sooner or later you may have to replace it. This is easy to do. It comes with a crystal already installed. Unfortunately, metal bezels are no longer an option with Starrett calipers.

Important note about crystal installation: you will need a crystal press to install a new plastic lens. These crystals are slightly over-sized. Once pressed in place, they will have a dome shape and this keeps them from falling out. If you do not have the tools to install these, then please buy the new bezel with crystal already installed, part PT99455 (listed above).



Starrett 943 Deluxe Padded Case For 6"/150mm Dial Caliper


 

Zero setting Starrett calipers

 

If the hand is no longer set on zero then the gear jumped a tooth because the gage was dropped or hit. It doesn't necessarily mean that there's internal damage. If the caliper still moves smoothly then everything's probably okay. Resetting the hand is a bit tricky but it can be done. Remove the bezel clamp and then tilt the bezel off carefully like the plastic lid on a take-out cup of coffee. (Pretend the coffee's hot.) The hand can then be pried off using a hand lifter or two smallish screwdrivers, one on either side of the pinion. Do this with caution so that you don't break the center pinion in the process. Now realign the hand to zero and tap it back on, gently but securely. Reassemble and you're all set. Don't attempt to play with the movement or to remove it. The gears are preloaded and you'll have a heck-of-a-time trying to get things to work again. If you're squeamish about all of this, send the gage to a repair shop (we no longer repair Starrett calipers). For additional instructions on dial caliper repair, refer to page 44.

 



 

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This page's most recent revision: 20 AUGUST 2016
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Original photographs and content copyright 2016 by JWGrum

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