Dial Caliper repair / preload & backlash

How to repair a Dial Caliper?
No other existing video could answer how to reassemble the spring preloaded gears inside the caliper. The spring preload eliminates the natural play within any geared machanics.
Since this is a very tiny mechanism, I guess most repairs even overlook this fact.
I figured out how to preload the springs in place and eliminate the backlash play.
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[@ErikBongers]

I have the exact same mechanism. This video saved my instrument. (And my mental health) Removing those 3 screws was the missing puzzle piece for me.

[@robertschlitters5764]

Thank you so much. I fix a lot of the tools that we use and make some custom tools that are part-specific. This will hopefully help me fix the collection of dial calipers that are in my repair bin. I'm looking for the preset torque specs for the main test indicator tip pivot for jeweled bearings. They seem to be extremely delicate and sensitive. I'm not sure that my old hands can feel that tiny amount anymore. Thanks again for putting this up! It is also great to get this from someone with the same perspective, being German/Austrian myself. We seem to have a knack for inventing tools and machines. We see things from an "analytical and How mechanical things work" perspective. It makes us good at what we do. I work in aerospace, and due to a spine injury, no longer operate large cnc milling machines. I assemble subassemblies and rework and repair parts that need some help. I have to know a whole bunch of stuff and have had to come up with new ways to do things when the common methods our vendors use fail. Parts get scratched, dropped, banged, and dented. They complain about how many tools I have at work and that three tool rollaway cabinets are too many , but I can do anything they throw at me. I have been meaning to look this up for years now and just got it in my head tonight. Thank you!

[@johnhall8455]

if only pointer adjustment is needed….just remove the bezel and glass…remove the pointer and replace in the corrected desired position…replace bezel and glass…job done..

[@sockeleipzig]

Gibt es das Video auch in deutscher Sprache

[@justprinted_3den988]

Ja, meinen ganzen Kanal gibt es in deutsch kzbin.info/www/bejne/q568ZJ1jlpihpaM

[@gangleweed]

I have often wondered if it would be much easier to adjust a dial caliper if the actual rack was made to move back and forth.......then all you have to do is slacken the holding screws for the rack and move it left or right to get the needle to once more be vertical.......this would save having to open up the works to get it to calibrate to zero........my Mitutoyo dial caliper has a single small gear that meshes with the rack and it sometimes hops over a tooth and the needle goes off centre......crap design.

[@ErikBongers]

Also, add the words "preload" and "backlash" to the title.

[@justprinted_3den988]

I did it, thanks for your suggestion.