Rexroth R910751138 SHAFT KEY

Technical Specifications

• Manufacturer: Bosch Rexroth
• Part Number (MNR): R910751138
• Model Code: PARALLEL KEY 4KT 6,35X 28,6
• Shaft Style Compatibility: SAE Keyed Shaft (K Style)
• Pump Frame Size: 28 cm³ per revolution (A10VO28 / A10VSO28)
• Component Type: Drive Shaft Key / Parallel Square Key
• Key Width (Square): 6.35 mm (1/4 in)
• Key Length: 28.6 mm (1-1/8 in)
• Material Composition: Heavy-Duty Hardened Carbon Steel

Product Overview

The Bosch Rexroth R910751138 is a genuine, high-tensile parallel shaft key engineered explicitly for A10VO28 and A10VSO28 Series 31 variable displacement axial piston pumps with SAE keyed shafts. This precision-ground square key fits perfectly into the pump's input shaft keyway, locking the drive gear, pulley, or coupling securely in place. It ensures slip-free torque transfer from the engine or electric motor directly into the pump's rotary group. Replacing a worn or sheared key eliminates rotational play, protects the main drive shaft from catastrophic keyway damage, and restores reliable mechanical power transmission.