Rexroth Motor
Rexroth Axial Piston Fixed Motor A2FM
  • Description
  • Technique Feature
  • Specification
  • Applied Range

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Data Sheet of Rexroth A2FM

REXROTH Type Code of A2FM Series

 
 

General information

- During commissioning and during operation, the axial piston unit must be filled with hydraulic fluid and bled. This must also be observed during longer standstill as the axial piston unit might drain itself via the hydraulic lines.

- Complete filling and bleeding must especially be ensured with the “Drive shaft upwards” installation position as there is, for example, the risk of running dry.

- The leakage in the housing area must be discharged to the tank via the highest-located drain port (T1, T2).

- If one joint drain line is used for several units, it is to be ensured that the relevant housing pressure is not exceeded. The joint drain line must be dimensioned so that the maximum admissible housing pressure of all connected units is not exceeded in any operating state, particularly during cold start. If this is not possible, separate drain lines have to be laid, if necessary.

- In order to achieve favorable noise values, all connection lines are to be decoupled using elastic elements and over-tank installation is to be avoided.

- The tank line must lead into the tank below the minimum liquid level in every operating state.

 

Installation position

See the following examples 1 to 8.

Further installation positions are possible upon request. Recommended installation position: 1 and 2.

Note

For installation position 4 and 8 "shaft upwards" an air bleed port R is required (specify in plain text when ordering, special version).

With sizes 250 to 1000, port U is provided as standard in the area near the bearings for air bleeding.

Below-tank installation (standard)

Below-tank installation is at hand if the axial piston unit is installed below the minimum liquid level outside the tank.

 

Installation position

Air bleeding

Filling

1

T1

2

T2

3

T1

4

R (U)

T2

 

Above-reservoir installation

Above-reservoir installation means that the axial piston unit is installed above the minimum fluid level of the reservoir.

Recommendation for installation position 8 (drive shaft upward): A check valve in the drain line (cracking pressure 0,5 bar) can prevent draining of the pump housing.

 

Installation position

Air bleeding

Filling

5

F

T1 (F)

6

F

T2 (F)

7

F

T1 (F)

8

R (U)

T2 (F)

 

Key

F

Filling / Air bleeding

R

Air bleed port

U

Bearing flushing / air bleed port

T1, T2

Drain port

ht min

Minimum required immersion depth (200 mm)

hmin

Minimum required spacing to reservoir bottom (100 mm)

 

Note

- Connection F is part of the external piping and must be provided on the customer side to simplify the filling and bleeding.

 

General project planning notes

- The axial piston unit is designed to be used in open and closed circuits.

- The project planning, installation and commissioning of the axial piston unit require the involvement of qualified skilled personnel.

- Before using the axial piston unit, please read the corresponding instruction manual completely and thoroughly. If necessary, request it from Bosch Rexroth.

- Before finalizing your design, request a binding installation drawing.

- The specified datas and notes must be observed.

- Preservation: Our axial piston units are supplied as standard with preservative protection for a maximum of 12 months. If longer preservative protection is required (maximum 24 months), please specify this in plain text when placing your order. The preservation times are valid under optimal storage conditions. Details of these conditions can be found in the data sheet 90312 or the instruction manual.

- Not all versions of the product are approved for use in a safety function according to ISO 13849. Please consult the responsible contact person at Bosch Rexroth if you require reliability parameters (e.g. MTTFD) for functional safety.

- A pressure relief valve is to be provided in the hydraulic system.

- Observe the instructions in the instruction manual regarding tightening torques of connection threads and other threaded joints used.

- The notes in the instruction manual on tightening torques of the port threads and other screw joints must be observed.

- The ports and fastening threads are designed for the permissible maximum pressure pmax (see instruction manual). The machine or system manufacturer must ensure that the connecting elements and lines correspond to the specified operating conditions (pressure, flow, hydraulic fluid, temperature) with the necessary safety factors.

- The working ports and function ports are designated only to accommodate hydraulic lines.

 

Axial piston fixed motor A2FM series 6X Technical data
 
1) These values are valid at:
- for the optimum viscosity range from vopt = 36 to 16 mm2/s
- with hydraulic fluid based on mineral oils
2) Intermittent maximum speed: overspeed for unload and overhauling processest, t < 5 s and Δp < 150 bar
3) Restriction of input flow with counterbalance valve
4) Torque without radial force, with radial force see table "Permissible radial and axial forces of the drive shafts"
 

 

Axial piston fixed motor A2FM series 70 Technical data
 
 
1) These values are valid at:
- for the optimum viscosity range from vopt = 36 to 16 mm2/s
- with hydraulic fluid based on mineral oils
2) Intermittent maximum speed: overspeed for unload and overhauling processest, t < 5 s and Δp < 150 bar
3) Torque without radial force, with radial force see table "Permissible radial and axial forces of the drive shafts"
 

Axial piston fixed motor A2FM series 6X Features

- Large variety of available nominal sizes allows exact adjustment to the application

- High power density

- Very high total efficiency

- High starting efficiency

- Working ports SAE flange or thread

- Optional with integrated pressure relief valve

- Optional with mounted addifitonal valve: counterbalance valve (BVD/BVE), flushing and boost- pressure valve

- Bent-axis design

 

 

Axial piston fixed motor A2FM series 70 Features

- 3 pressure ranges to fit to different customer requirements and applications

- Very high power density

- Very high total efficiency

- High starting efficiency

- Robust 40° bent-axis technology

- Optional with integrated flushing valve

- Bent-axis design

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