10SPJ ( RD20244 Main Shaft Assembly)

Genuine Shimano Main Shaft Assembly (part #10SPJ) — the main shaft is the central axle of a Shimano spinning reel, connecting the spool to the internal gear train and oscillation mechanism. It transfers cranking power into spool movement and must maintain precise alignment for smooth operation. A bent, worn, or corroded main shaft causes spool wobble, rough drag engagement, and uneven line lay. Cross-references with Shimano part number RD20244. OEM replacement ensures factory-spec straightness and hardened steel construction for years of reliable service. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano spinning reel parts.