52:1 Pivot Irrigation Gearbox – Long Shaft External Chamber Heavy Duty52: 1 Pivot Irrigation Gearbox Long Shaft External Chamber Heavy Duty High Performance Gearbox for Center Pivot Irrigation Systems The 52: 1 long shaft irrigation gearbox is engineered for durability, torque efficiency, and dependable field performance in center pivot irrigation systems. Designed for compatibility with major pivot equipment, this gearbox serves as a reliable replacement solution for maintaining system operation. Built for Heavy Duty