Type of tolerance fit Type of tolerance fit pnkjrao (Marine/Ocean) (OP) 4 Apr 00 04:55 I would be happy if someone can educate me on what typeof a fit would a spur gear have on a shaft,if the gear in question is a driving gear for a one ton mechanical davitto hoist a rescue boat.eg sliding fit/force fit/etc RE: Type of tolerance fit ecampos (Mechanical) 17 Apr 00 19:21 Are you relying on the press fit to transfer the load from the gear to the shaft? There are no splines, keys, Loctite, anything else? If not I need more info on size of gears, ratios, speeds etc. to help you. RE: Type of tolerance fit BIMMER (Automotive) 23 Jun 00 10:50 I suggest a small press fit. Aprrox. 0.0005" of press per 1" of shaft diameter. Heat the gear to 275-300 deg F and the gear will slide right on and lock in place. This will minimize wear that comes from a sloppy fit. A gear puller will be needed for removal (heat may also be needed). RE: Type of tolerance fit diamondjim (Mechanical) 8 Aug 00 00:42 I assume the bearing is the typical bolt on bearingand the clearance would be minimal depending on theball size or could be roller size. No need for preloadas this would make it that much harder to turn and alsorequire greater mounting surface accuracy.