Specificationsd16,2 mmTolerance: 0 / +0,1D k70,5 mmB18,3 mmC18,1 mmC 17 mmC 2 min1,1 mmD40 mmD 065,1 mmp1/2 inchPitchR48 mmz16Number of teethm0,1 kgMassFor chains to DIN 8187For chains to DIN 8188Material: Plastic PAComposition of designation using example of roller chain idler sprocket unit KSR15-B0-06-10-20-08KSR Roller chain idler sprocket unit15 Bearing bore diameterB0 Radial insert ball bearing with eccentric locking collar, Series RAE. . -NPP06 Sprocket pitch in 1/16", code10 Chain code (width index or relevant standard)20 Number of teeth08 Material code (sintered iron)