TRANSMISSION OF POWER 



33 



FIG. 1 8 MALLEABLE LINK BELTING 

 OF ROTATING SHAFTS 



per minute. Rule : Multiply the diameter of the driver 

 by its r.p.m. and divide the product by the r.p.m. of the 

 driven ; the quotient will be its diameter. 



Case III. To ascertain the size of the driver. Rule: 

 Multiply the diameter of the driven by the r.p.m. de- 

 sired that it should 

 make and divide the 

 product by the revolu- 

 tions of the driver; the 

 quotient will be the size 

 of the driver. 



No allowance is made 

 in the above rules for 

 slip. 



50. Link belting. A 

 common means of distributing power to various parts of 

 a machine is by link belting-. Chain link belting is 

 adapted to almost all purposes except high speed. Two 

 kinds of link belting are now found in general use. One 

 'style is made, of malle- 

 able iron links (Fig. 

 18) and the other 

 crimped steel (Fig. 19). 

 In regard to the desira- 

 bility of each, data is 

 not at hand. However, 

 it is stated that the steel 

 links wear longer, but FIG - IQ-STEEL LINK BELTING 



cause the sprockets to wear faster. If this be true, the 

 steel belting should be used on large sprockets and the 

 malleable confined to the smaller sprockets. 



51. Rope transmission often has many advantages over 

 belt transmission in that the first cost of installation is 



