Roller chain or bush roller chain is the type of chain mostly used for transmission of mechanical power. It really is simple, reliable, and effective. American standard chains possess a smaller sized pin diameter than their European standard Leaf Chain equivalent.
Common Applications
Machinery
Railway Industry
Quaries
Agricultural Equipment
Textile Machinery
Printing Equipment
Transport
Fairground 
Rides
ASA25-1 Chain Specifications
Pitch: 6.35mm
Inner Plate Width: 3.175mm
Roller Dia: 3.302mm