... Position barrel between roller guides. Step 6Position barrel between roller guides and start tumbling.Step 7 Tumble for no more than ... the motor pulley.8. If the barrel or the roller guides become wet, dry them thoroughly to prevent barrel ... , jewel consumables, polishing machine, bristle brushes, polishing buff etc 220V 11kg Capacity Rotary Tumbler jewelry tumbler polisher Tumbling Machine for Jewelry