Rexroth R909444805 Spring Collar

Key Specifications

• Manufacturer: Bosch Rexroth
• Part Number (MPN): R909444805
• Model Designation: SPRING DISK 20116.0690
• Alternative Names: Cup Collar / Center Pin Disk Spring Seating Washer
• Motor Range Compatibility: Rexroth A2FM45 (45 cc Fixed Displacement Axial Piston Units)
• Critical Physical Dimensions: Total Width (W) = 15.55 mm | Height (H) = 6.15 mm | Outer Diameter (OD) = 7.1 mm

Product Overview

The Bosch Rexroth Spring Collar / Spring Disk is a genuine OEM high-precision rotating group component designed for fixed-displacement axial piston motors. Specially engineered for the Rexroth A2FM45 series (45cc models), this specialized cup collar acts as a secure seating washer for the internal cylinder block disk springs or center pin arrangement. Precision-machined from hardened steel, it ensures perfectly uniform spring load distribution, eliminating internal component play and protecting the internal rotating assembly from uneven friction or mechanical wear under aggressive dynamic workloads.