Bosch Rexroth | AZPFF-12-008008RQR1212MB
AZPFF-12-008/008RQR1212MB
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The AZPFF-12-008/008RQR1212MB is a double-stage gear pump built by Bosch Rexroth for the AZPF External High Performance Gear Pumps series. It provides hydraulic flow for automation systems that rely on compact external-gear units to move actuators. Stage I displacement is 8.0 cm³ per revolution, and stage II matches this value to keep both outlets balanced. Each stage tolerates intermittent pressures up to 280 bar so the pump can absorb brief load spikes common in mobile machinery. The unit turns clockwise when viewed on the shaft, ensuring compatibility with right-hand drive arrangements. A maximum speed of 4000 rpm enables high flow rates without overspeeding the gears. Torque is transmitted through a parallel keyed shaft that follows the SAE J744 16-1 A specification, giving users a standard coupling interface.
The housing attaches with an SAE J744 82.55 mm two-bolt A flange, allowing direct mounting to engines and power take-offs. Both pressure ports use a 7/8-14 UNF SAE Boss thread, and the suction ports share this thread size so one hose fitting specification covers the entire assembly. The shaft diameter is 15.875 mm, and a 4 × 20 mm DIN 6885 key secures the hub to prevent slippage. NBR sealing material holds back hydraulic oil while accommodating common fluid chemistries. Fluid temperature can range from −30 °C during cold starts to 80 °C at full load, protecting seals and gear clearances across typical operating conditions. The rear cover is supplied without a valve, leaving system designers free to install external relief or control elements as needed.
Technical Specifications
Direction Of Rotation
Clockwise (viewed on shaft)
Displacement (stage I)
8.0 cm3/rev
Displacement (stage Ii)
8.0 cm3/rev
Drive Shaft Type
Parallel Keyed (SAE J744 16-1 A)
Max Fluid Temperature (nbr)
80 °C
Max Intermittent Pressure (stage I)
280 bar
Max Intermittent Pressure (stage Ii)
280 bar
Max Rotational Speed
4000 rpm
Min Fluid Temperature (nbr)
-30 °C
Mounting Flange
SAE J744 82.55 mm 2-bolt (A)
Pressure Port Thread (each Stage)
7/8–14 UNF (SAE Boss)
Rear Cover
Without Valve
Sealing Material
NBR (nitrile rubber)
Shaft Diameter
15.875 mm
Shaft Key Size
4 × 20 mm (DIN 6885)
Suction Port Thread (each Stage)
7/8–14 UNF (SAE Boss)
1620 Old Apex Road
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