Fixed-displacement axial-piston pump A2FO12/61L-VPB06

A2FO12/61L-VPB06, manufacturer material number R902027137, is a Bosch Rexroth A2FO series 61 fixed-displacement bent-axis axial-piston pump for open hydraulic circuits. Nominal size 12 has a published geometric displacement of 12 cm³/rev. This FKM-sealed execution rotates counter-clockwise when viewed at the drive shaft, delivering from suction port S to pressure port A.

The execution uses Parallel keyed shaft, DIN 6885 AS6x6x32 and a four-hole mounting flange similar to ISO 3019-2. The pressure connection is a side-facing M22 x 1.5 threaded port; suction uses a rear M33 x 2 port, both to DIN 3852.

Nominal 400 bar and maximum 450 bar are absolute high-pressure-port limits for mineral oil. Maximum pressure permits at most 10 seconds per period and 300 cumulative hours. The 3150 rpm reference maximum speed requires 1 bar absolute suction pressure and viscosity 16–36 mm²/s. The 6000 rpm limiting speed needs increased inlet pressure according to the manufacturer curve. The 38 L/min reference flow is theoretical, without efficiency or tolerances.

The continuous fluid-temperature reference is −25 to +90 °C at port T with permissible viscosity. The case must remain filled, air must be bled, and the appropriate drain port must be connected according to installation position. Case-to-ambient differential pressure, seal temperature, bearing loads and inlet pressure have separate limits in the original pages; the suction-port pressure allowance does not override the case-seal limit.

The technical reference is the original manufacturer publication RE91401, edition 2012-06. Its archive edition is disclosed; no later edition or unverified special execution is implied. A binding article-specific installation drawing should be obtained before final design. Representative Bosch Rexroth A2FO series 6 manufacturer photograph; shaft, size, ports and rotation may differ from the individual execution.