Does anyone know how to stop this gear from sliding out?

[Jcm1108]

 

[trailrider]

I presume he shaft itself rotates and the gear is supposed to be fixed to the shaft. One possibility would be to spread some LokTite on the shaft, or some CA epoxy. You would have to be careful not to cement the shaft to the tower. Otherwise, if the small gear is supposed to rotate freely on the shaft, then some type of retaining piece on the outer end of the shaft.

 

[Jcm1108]

Thankyou that was my thought but didnt know if that was the right way to go about it.

 

[D&J RailRoad]

I would clean the fuzz off the truck too.

 

[Selector]

You can use CA, but I prefer two-part epoxy for this kind of job. I have repaired plastic gears in brass clockwork mechanisms using epoxy. However, all adhesives require a minimum of surface area to do the job asked of them in a given application. For shafts like this, you need to score it with a sharp instrument or rough grit sandpaper. Roughen the surfaces, even on the inside of the gear itself using a needle file. Clean fully to get rid of filings and dust, and of organics like the lubrication there. Then mix up a very small bit of epoxy, 1/2 tsp would be about four times what you'll end up using, and then apply some around the roughened part of the shaft. Insert the shaft, slide it into place, ensure the fit, AND THAT the gear's faces are fully perpendicular to the shaft's axis. use a toothpick to apply a bit more epoxy to either side of the gear's faces where the shaft is inserted. Allow over night to cure the epoxy.

 

[Smudge617]

If all your trying to do is stop the gear sliding around on the shaft, wouldn't a circlip be sufficient to hold it in place.

 

[D&J RailRoad]

A circlip needs a groove to grip in order to be effective.

 

[Smudge617]

OK, let me rephrase my suggestion.
why not cut two shallow grooves either side of the shaft with a small hacksaw blade and then fit a circlip.

 

[dennis461]

small pair of dykes. put dimples on the shaft

 

[boatwrench]

If all your trying to do is stop the gear sliding around on the shaft, wouldn't a circlip be sufficient to hold it in place.

or a push nut. Loc-Tite does make an adhesive for studs and pins. I would on apply to the outboard side of the gear and hope that capillary action would do the rest

 

[dennis461]

... Loc-Tite does make an adhesive for studs and pins. I would on apply to the outboard side of the gear and hope that capillary action would do the rest

Glue will most likely not work if the gear was ever oiled.