Hipster
I'm Awesome
used to see shims in quite few things that had double timkins. motorcycle wheel bearings, some engines, rear diffs that had a shim stack on the pinion instead of a crush sleeve, etc. You used to see spacers in alot of FWD hubs. Set-up and whether they call for some pre-load or a little free play is very application specific.Spindles had multiple systems to achieve adequate free-play. The two most-common in my experience:
Some spindles were double-drilled, if one cotter-pin hole had too much--or too little free play, the other cotter pin hole would be perfect. Seems like most folks never figured out that there was a second hole, because they never properly cleaned the grease out of the end of the spindle.
Some had a stamped-sheet-steel multi-castellated "nut" that slid over the actual adjusting nut. The stamped-steel deal could be installed in any one of several positions so that the castellations could be lined-up with the cotter pin hole no matter how the adjusting nut was positioned.
And of course, the early drum-brake Toronado/Eldorado front wheel bearings were common, ordinary (big) wheel bearings with ordinary races. Set 17, maybe, two per side. Cheap and easy to find. Problem was, when used on a Toro/Eldo, you bought the two bearings plus a precision-machined spacer in a package deal, as a Set 23, about four times the cost of the two individual bearings. The "adjuster" nut on the end of the CV joint got torqued to spec, with the bearing free-play set by that precision-machined spacer.
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Been years since I've dicked with my Toro. The later disc-brake hubs used a different bearing assembly. I've kinda forgotten the details.
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