SHS Gearbox Shim Set — Mixed Thickness
SHS Gearbox Shim Set — Mixed Thickness
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DETAILS
DETAILS
- description
Shimming sets the clearance between each gear and the shell, and getting it right is the difference between a gearbox that runs quietly for years and one that chews itself up.
A mixed set matters because you cannot know in advance which thicknesses a particular box will want. Shimming is done by trial, so having the range to hand is the whole point.
It is also the one job that no other upgrade can compensate for. Steel gears fitted to a badly shimmed box fail just as readily as the ones they replaced.
Specifications
| Specification | Detail |
|---|---|
| Contents | Mixed thickness shims |
| Material | Steel |
| Fits | Standard AEG gearboxes |
| Sold as | One set |
Good to know before you buy
Keep the offcuts. Every gearbox wants a slightly different stack and a spare set saves a stripped build later.
Frequently asked questions
How do I know when the shimming is right?
Each gear should turn freely with only the smallest amount of side play, and the gears should mesh without binding when the shell is closed.
Do I need to reshim after changing gears?
Yes. Shim thickness is specific to the gears fitted, so a new set means starting again.
Why does a set have mixed thicknesses?
Because no two shells and gear sets are identical. Shimming is done by fitting and checking, which needs a range to choose from.