JB/T 8808-1998 This standard specifies the type, basic parameters and main dimensions, technical requirements, test methods, inspection rules, packaging, storage and transportation of DLM2 electromagnetic clutch. This standard applies to DLM2 dry-type, multi-friction plate, coil rotating electromagnetic clutch, nominal torque 630~25000N·m, working environment temperature -20~+50℃, relative humidity not exceeding 80%. (Note: This standard will also replace JB/ZQ 4385-86 "DKM2 Type Electromagnetic Clutch" from the date of effectiveness.)