

MACIIIM 1'KVWIV K8IGN 



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.i.l.l plan. Scale, half full size. 



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in making the split muff coupling, the faces for the joint 

 between the two halves of the box are first planed. The 

 bolt holes are then drilled, and the two halves bolted togctlu r 

 with pieces of paper between them; then the muff is bored 

 out to the exact size of the shaft. When the paper is re- 

 moved, and the box put on the shaft and bolted up, the box 

 _rnps the shaft firmly. The key has no taper, and should lit 

 on the sides only. 



