Rectangular Keys

The cross section of the key is either square or rectangular and hence the name. This is the most standardized version of keys currently being used in all applications. The size of the key to be selected based on the shaft size is already been standardized for rectangular keys. The chart is enclosed below as a ready reference.  
 
Rectangular Keys are generally used for Automobiles, gearboxes, starters, alternators, fuel injection pumps, oil pumps, water pumps and brake compressors, Two wheelers,Electric motors, alternators and switch gears, Machine tools and all types of pumps Textile machineries,Pharmasitical Machinery, Heavy Duty Machinery, Earth moving Machinery, Automotive Cran etc.