SKF power transmission in this catalog is divided among belts, chains, pulleys, sprockets, couplings and components connecting them to the shaft. Start a search by distinguishing a belt drive, chain drive or coupling between shafts. That leads to different lines and avoids comparing a reference only by appearance without recognizing its system.
Synchronous belts, V-belts, polyurethane belts and multi-rib belts have their own pages. For chains and sprockets, keep identification of both parts associated with the assembly. Pulleys and tapered bushings can also have separate codes: a pulley reference does not replace identification of the part fastening it to the shaft.
To reproduce an existing drive, send readable markings for each component and a photograph of the assembly. Include the machine, connected shafts, quantity and verified measurements. Preserve the entire printed designation on a belt; for a coupling, explain which parts are requested. If you intend to modify the system, include equipment documentation to distinguish that assessment from a replacement using the same code.