https://www.beentools.com/product-category/transmissionpartscat/transmissionchaincat/shpitprollchaincat/
short pitch precision roller chain for precision transmission
Short pitch precision roller chains are characterized by low noise and high precision and are used in cranes, CNC machine tools and other precision equipment.
precision roller chainshortpitchtransmission
https://www.diamonddrives.com/products_category/precision-roller-chain/
Precision Roller Chain Archives - Diamond Drives by Timken
precision roller chaindiamond drivesarchivestimken