Bosch Rexroth A2FO200/63L-PBB05 fixed-displacement axial-piston pump

Bosch Rexroth A2FO200/63L-PBB05 (material number R902024700) is a series 63 A2FO fixed-displacement bent-axis axial-piston pump for an open hydraulic circuit. Nominal size 200 has a geometric displacement of 200 cm³/rev. This execution has NBR seals and rotates counter-clockwise when viewed at the shaft end, delivering from S to A.

The shaft is Parallel keyed shaft, DIN 6885 AS14 x 9 x 80. It uses a four-hole ISO 3019-2 flange. The side pressure connection has 1 1/4 inch SAE J518 high-pressure-series flange dimensions and the rear suction connection 3 1/2 inch SAE J518 standard-pressure-series dimensions. The flange fasteners use metric threads; the inch flange sizes are not pipe threads.

The 350 bar nominal and 400 bar peak outlet values are the archived shaft-specific limits, referenced to DIN 24312; peak pressure is not a continuous rating. The 1550 rpm reference maximum requires mineral oil, 1 bar absolute inlet pressure at S and the recommended 16–36 mm²/s viscosity range. Reaching the 2750 rpm limiting speed requires increased inlet pressure according to the manufacturer inlet-pressure/speed curve and compliance with the shaft-seal pressure limit.

NBR shaft seals have 33% lower permissible case pressure than the published FKM shaft-seal curve. Case pressure must be at least the external pressure at the shaft seal. A suction-port pressure allowance does not override this case/seal limit. Keep the case filled, bleed air before loading, and route the highest case-drain port to the tank as specified for the installation position; left-hand rotation uses the port plate rotated 180° from the clockwise drawing.

The applicable technical reference is the original manufacturer publication RE91401, March 2008, which documents this NBR execution and its shaft-specific limits. Representative manufacturer A2FO series 6 photograph; the illustrated shaft, size, rotation and ports may differ from this material-number execution.