SPROCKET ASSEMBLY FOR USE SOLELY OR PRINCIPALLY WITH MINING EQUIPMENT. THE ASSEMBLY PROVIDES THE DRIVE FOR COAL CUTTING MACHINERY OPERATING ON A LONGWALL COAL FACE. IT CONTAINS A PINION (SPROCKET) OF A RACK AND PINION DRIVE SYSTEM, THE PINION BEING INTEGRAL WITHIN THE COAL CUTTING MACHINE AND THE RACK ATTACHED TO AN ARMOURED FACE CONVEYOR ON WHICH THE COAL CUTTING MACHINE IS POSITIONED. THE DRIVE FOR THIS UNIT IS CONTAINED WITHIN THE COAL CUTTING MACHINE. THE SPROCKET WHEEL AND GEARINGS ARE MANUFACTURED FROM FORGED STEEL WITH ALL OTHER PARTS OF THE ASSEMBLY BEING OF STEEL WITH PLASTIC OR RUBBER SEALS.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6, CN 84834021 GEARS AND GEARING OTHER THAN FRICTION GEARS, SPUR AND HELICAL. SECTION XVI NOTE 2 (A). HS NOTES TO HEADING 8483.