REPAIRING CREAMERY MACHINERY 93 



Punch holes in a line one inch from cut edges, the 

 number depending on width of the belt. They should 

 be about one and one-half inches apart. Punch the 

 back holes one and one-half inches from first row 

 and directly between. Begin lacing at middle of 

 belt. Be careful to have smooth side of lacing next 

 pulley. The ends are fastened by running them 

 through small holes punched in line with the lace 

 holes. Repair broken belt with steel wire lacing by 

 using only one row of holes on each end of belt. 

 Also repair with steel belt lacing. 



Repair broken belts with glue by cutting each end 

 off squarely and then cut widthwise, a slant beginning 

 back two inches from edge of belt, and slant to a 

 narrow edge. Glue slanting surface of both ends. 

 Place together and press until dried. Determine the 

 efficiency of the four methods by daily use. 



Determine speed of main shaft and pulleys on 

 machinery by the following formula: 



To Determine Diameter of Pulley on Main Shaft 



When the speed of engine pulley is 1000 revolutions 

 per minute, the diameter of the engine pulley is 5 

 inches and the speed of the main shaft is 180 revolu- 

 tions per minute. 



1000 X 5 -f- 180 = 27.7 inches. 



To determine the speed of the main shaft when the 

 diameter of pulley on main shaft and diameter and 

 speed of engine pulley is given as in above example. 



1000 X 5 - 27.7 180 



