817-456C Great Plains Tension Roller - Chain Idler Roller for Great Plains Grain Drill

817-456C Great Plains Tension Roller is a steel idler roller used in the drive system of Great Plains grain drills. This tension roller maintains proper chain tension in the opener drive assembly, preventing chain slack, skipping and slipping that cause inconsistent seed metering. It features a smooth steel outer surface and precision ball bearing for low-friction rotation, delivering stable performance under continuous field operation. Worn or seized rollers disrupt seed drive timing and reduce planting accuracy. Constructed from durable steel with sealed bearing, it withstands dusty and abrasive farm environments. It is a direct aftermarket replacement for OEM 817-456C, compatible with early model Great Plains grain drills including 2SF,3SF,3PD,EWNT and Solid Stand series. Install this tension roller to restore reliable chain drive, maintain uniform seed spacing and improve planting consistency for wheat, oats, barley and other small grains.