THE PULLEYS OF A SEPARATOR. 213 



cover, pull out the nails and renew the wedges if necessary. 

 Select a good piece of leather a little wider than face of 

 pulley and about four inches longer than the distance 

 around. Soak it in water about an hour. Cut off one end 

 square and nail it to one pair of the wedges, using nails just 

 long enough to clinch. To stretch the leather, use a clamp 

 made of two pieces of wood and two bolts. Block the shaft 

 to keep it from turning, and stretch the leather by prying 

 over the clamp with two short levers. The leather should 

 not be stretched around the whole pulley at once, but the 

 clamp should be so placed that there is only sufficient room 

 to nail to the next pair of wedges. Now move the clamp 

 and nail to each pair of wedges in turn, finally nailing the 

 leather again to the first pair before cutting off. Trim the 

 edges even with the rim of the pulley. 



Riveted Covers. The same method of stretching the 

 leather by means of a clamp may be used on pulleys with 

 riveted covers or they can be covered in the following man- 

 ner : Soak the leather in water for an hour. Cut off one end 

 square, and rivet it on. Then draw the leather around the 

 pulley and mark the next two pairs of holes. Punch holes 

 in the leather a little back of the marks made by the first 

 pair of holes and a little farther back of the marks made by 



the second pair of holes. Insert the points of two scratch 





 awls through the second pair of holes in the leather and into 



the corresponding holes in the pulley rim. Using scratch 

 awls as levers, draw the leather very tight and the first pair 



