Standard double pitch chains are used to travel on a horizontal floor and conveying products. The chains designed for these purposes are equal in roller diameter to single pitch chain of the same pitch length for increased live load capacity and lower traveling resistance. The rollers larger in outer diameter are called large rollers, and the regular rollers are called small rollers.
Standard drilling motors are used to drive drawworks, mud pumps, rotary tables, top drives and anchor-handling winches on all types of drilling rigs. It is designed to withstand the harshest requirements of drilling rigs, locomotives and mining trucks.