... collector silp ring carbon brush. 3.ISO9001:2008 JT2 series cable reel drum is a very small kind device for reeling cables, ... drum components include :winding spring group,winding drum, slipring, brush rocker, engine base, drive axle and other small components.Cable ... with mechanical force,and winding spring group will have elasticity for cable,then cables will keep tensioning condition; When getting ...