Brewer 1AU3B V-Belt Idler Pulley - Cast Iron Ball Bearing, 3" OD, A-Section 30mm The D&D Global 285H1771 is

The D&D Global 285H1771 is a synchronous timing belt with H-pitch profile

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so a 3/CK185 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

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Brewer 1AU3B V-Belt Idler Pulley - Cast Iron Ball Bearing, 3" OD, A-Section 30mm The D&D Global 285H1771 isBrewer V Belt Idler Pulleys feature radial reinforcing ribs in the groove to prevent deformation from the wedging action of the belt. The smooth, durable grooved surface promotes accurate tracking and quiet, long lived operation. Bore adapters can be factory installed to facilitate mounting. Authorized Brewer distributor Same day shipping from Houston Volume pricing on quantities of 5+. Need a matching idler stud or different bearing type? Call 888