24 



LEATHER BELTING 



tensions given in columns 3 and 9. The use of the tables 

 presupposes that the belts will be subjected to regular in- 

 spection and measurement of the tension, according to che 

 system outlined in Chapter V, or a system that will accom- 



15 



1000 



5000 



2000 3000 4000 



Velocity of Belt Ft. per Min. 



FIG. 3. RELATION BETWEEN VELOCITY OF BELT AND HORSEPOWER TRANS- 

 MITTED PER SQUARE INCH OF BELT CROSS SECTION. 



Horsepower Computed by Earth's Formulae. 



plish the same result, to insure that the tension of the belt will 

 not fall, while in service, below the minimum tension as given 

 in the tables. While the tables are calculated for belts of 

 i sq. in. of cross-sectional area, they can be adapted to belts of 

 any width and thickness by means of the table of factors on 



