Lincoln Service Parts 1 › Lincoln Electric 9SS10842-16 POLARITY SWITCH ROTOR ARM ASBLY S10842-16 Lincoln Electric 9SS10842-16 POLARITY SWITCH ROTOR ARM ASBLY S10842-16 Sale Price: $107.66 Original Price: $123.81 POLARITY SWITCH ROTOR ARM ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! POLARITY SWITCH ROTOR ARM ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1