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