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one of them end thrust is provided for. Different sizes of spindle may 
be used by having spare sleeves to be slipped on the smaller sizes and 
into the bearings. 
The special features of the machine are the way in which the load is 
applied and measured. This is accomplished by having a stiff, cast-iron 
yoke (b), through the center of which the spindle passes. The ends of 
the yoke project over the ends of the table and are provided with hardened 
steel knife edges (c) on which rods are hung, and the weights used for 
the load are suspended on these rods (d). The knife edges on which the 
weights are hung are on a line that passes an eighth of an inch above the 
center of the yoke, and as the rods are free to move on the edges, a nice 
balance of the yoke can be maintained. The bearing to be tested is 
placed in a cage that is fitted in the center of the yoke, and the shaft or 
spindle is revolved inside of it. The tendency of the yoke to revolve 
