FILENAMES: hub2.gif DESCRIPTION: This is a diagram of the workings of a bicycle wheel hub. Posted by Brian Drummond . Brian provided the following description: ================================================================= Text to accompany "hub2.gif" illustrating an unusual spoked wheel. Taken from Cassells "New Technical Educator" of 1897, in the "Drawing for Engineers" section If I were making a hub, I'd be tempted to use stock ballraces. And if it was in aluminium, I'd want deeper flanges to get a bit more thread engagement. ------------------------------------------------------------------------ Example 12. Fig. 39 is a drawing showing a half-section and a half-elevation of a hub and a spindle for the front wheel of a rear-driving safety bicycle. In this hub the spokes are screwed into the flanges a a, their other ends having conical ends for attachment to the rim, as shown in fig.40. The hub b is made of gun-metal or mild steel, and has a hard steel cup, c, forced in at each end to form the ball race. The spindle is screwed at each end for the reception of the hard steel "cones" d and e on which the balls run. The "cone" d is screwed hard against a shoulder formed on the spindle, and thus becomes practically one piece with the spindle. The "cone" e is adjusted on the spindle until the hub runs freely on the balls, but without any appreciable shake. The spindle is threaded through holes in the fork end, the fork ends occupying the position f. The nuts on the ends of the spindle are then tightened up, the "cone" e being thus locked in position. Fig. 41 is a section of Warwick's hollow rim for a 1 3/4" pneumatic tyre. Draw a section of the hub and spindle twice full size, and a complete side elevation of a wheel 28" outside diameter, with 32 spokes, and rim and tyre as in Fig. 41, half full size.