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A10FM series 52

  • Medium pressure motor for standard applications

  • Size 18 … 63

  • Nominal pressure 280 bar

  • Maximum pressure 350 bar

  • Open and closed circuits
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Features
Code
Technical Data
Dimension
Design Notes
Safety
  • Axial piston fixed motor A10FM series 52

  • Well-tried A10 rotary group technology

  • Approved for high speeds

  • Long service life

  • High power density

  • Low operating noise

  • Optional with integrated anti-cavitation valve, e.g. for fan drives

  • Optional with speed sensor

  • Swashplate design

Table of values

Size

18 23 28 37 45 58 63

Displacement
geometric, per revolution

Vg

cm³

18 23.5 28.5 36.7 44.5 58 63.1

Nominal pressure

pnom

bar

280 280 280 280 280 280 280

Maximum pressure

pmax

bar

350 350 350 350 350 350 350

Maximum speed 1)

nnom

rpm

4200 4900 4700 4200 4000 3600 3400

Inlet flow

at nnom

qV

l/min

76 115 134 154 178 209 215

Power

at nnom and pnom

P

kW

35.3 53.6 62.5 71.8 83.1 97.4 100.1

Starting torque

at nnom and pnom

M0

Nm

67.5 75 105 125 170 205 230

Torque

at pnom

M

Nm

80 105 127 163 198 258 281

Rotary stiffness

Drive shaft R

c

kNm/rad

14.835 28.478 28.478 46.859 46.859 80.59 80.59

Drive shaft W

c

kNm/rad

38.489 38.489 60.907 60.907

Drive shaft C

c

kNm/rad

18.662 30.017 30.017 46.546 46.546 87.667 87.667

Moment of inertia for rotary group

JTW

kg·m²

0.00093 0.0017 0.0017 0.0033 0.0033 0.0056 0.0056

Maximum angular acceleration

ɑ

rad/s²

6800 5500 5500 4000 4000 3300 3300

Case volume

V

l

0.15 0.6 0.6 0.7 0.7 0.8 0.8

Weight (approx.)

m

kg

6.5 12 12 17 17 22 22
1) At least 18 bar required at low pressure side

Note

  • The values in the table are theoretical values, without consideration of efficiencies and tolerances. The values are rounded.
  • Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life or total destruction of the axial piston unit. We recommend testing the loads by means of experiment or calculation / simulation and comparison with the permissible values.

Determining the operating characteristics

Inlet flow

[l/min]

Rotational speed

[rpm]

Torque

[Nm]

Power

[kW]

Key

Vg

Displacement per revolution [cm3]

Δp

Differential pressure [bar]

n

Rotational speed [rpm]

ηv

Volumetric efficiency

ηhm

Hydraulic-mechanical efficiency

ηt

Total efficiency (ηt = ηv • ηhm)

Hydraulic fluids

The axial piston unit is designed for operation with mineral oil HLP according to DIN 51524.

Application instructions and requirements for hydraulic fluids should be taken from the following data sheets before the start of project planning:


For operation with environmentally acceptable fluids please consult us.

Viscosity and temperature of hydraulic fluids


Viscosity

Shaft
seal

Temperature1)

Comment

Cold start

νmax ≤ 1600 mm²/s

NBR2)

ϑSt ≥ -40 °C

t ≤ 1 min, without load (p ≤ 30 bar), n ≤ 1000 rpm,
permissible temperature difference between axial piston unit and hydraulic fluid max. 25 K

FKM

ϑSt ≥ -25 °C

Warm-up phase

ν = 400 … 1600 mm²/s


t ≤ 15 min, p ≤ 0.7 • pnom and n ≤ 0.5 • nnom

Continuous operation

ν = 10 … 400 mm²/s3)

NBR2)

ϑ ≤ +78 °C

measured at port L

FKM

ϑ ≤ +103 °C

νopt = 16 … 36 mm²/s

range of optimum operating viscosity and efficiency

Short-term operation

νmin = 7 … 10 mm²/s

NBR2)

ϑ ≤ +78 °C

t ≤ 3 min, p ≤ 0.3 • pnom

measured at port L

FKM

ϑ ≤ +103 °C

1) If the specified temperatures cannot be maintained due to extreme operating parameters, please contact us.
2) Special version, please contact us.
3) Equates e.g. with the VG 46 a temperature range of +5 °C to +85 °C (see selection diagram)

Selection of hydraulic fluid

Bosch Rexroth evaluates hydraulic fluids on the basis of the Fluid Rating according to the technical data sheet 90235.

Hydraulic fluids with positive evaluation in the Fluid Rating are provided in the following technical data sheet:

The hydraulic fluid should be selected so that the operating viscosity in the operating temperature range is within the optimum range (νopt; see selection diagram).

Selection diagram

Filtration of the hydraulic fluid

Finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit.

A cleanliness level of at least 20/18/15 is to be maintained according to ISO 4406.

At a hydraulic fluid viscosity of less than 10 mm²/s (e.g. due to high temperatures in short-term operation) at the drain port, a cleanliness level of at least 19/17/14 according to ISO 4406 is required.

For example, the viscosity is 10 mm²/s at:

  • HLP 32 a temperature of 73°C
  • HLP 46 a temperature of 85°C

Operating pressure range

Pressure at working port A or B

Definition

Nominal pressure

pnom

see table of values

The nominal pressure corresponds to the maximum design pressure.

Maximum pressure

pmax

see table of values

The maximum pressure corresponds to the maximum operating pressure within the single operating period. The sum of the single operating periods must not exceed the total operating period.

      Single operating period

2.5 s

      Total operating period

300 h

Minimum pressure (high-pressure side)

pHP min

10 bar

Minimum pressure on high- or low-pressure side (port A or B) required to prevent damage to the axial piston unit.

Minimum pressure (low-pressure side)

pLP min

see diagram "Permissible rotational speed in relation to outlet pressure"

Rate of pressure change

Definition

Rate of pressure change

RA max

16000 bar/s

Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range.

Case pressure at port L

Definition

Motor operation mode

pL max

4 bar absolute

Maximum permissible case pressure measured at port L or L1

Pump operating mode

pL max

2 bar absolute

Note

  • Working pressure range valid when using hydraulic fluids based on mineral oils. Values for other hydraulic fluids, please contact us.

Permissible rotational speed in relation to outlet pressure

Pressure definition

1) Total operating period = t1 + t2 + ... + tn

Rate of pressure change

Direction of flow

Direction of rotation, viewed on drive shaft

clockwise

counter-clockwise

A to B

B to A

Permissible radial and axial forces of the drive shaft

Size

18 23 28 37 45 58 63

Splined shaft

Code

R R, W R, W R, W R, W R, W R, W

Tapered shaft

Code

C C C C C C C

Maximum radial force
at distance a = x/2
(from shaft collar)

Fq max

N

350 1200 1200 1500 1500 1700 1700

Maximum axial force

± Fax max

N

700 1000 1000 1500 1500 2000 2000

Sizes 23 and 28

Port plate 10

1) Flange ISO 3019-1

Port plate 16

1) Flange ISO 3019-1

Drive shafts

1) Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

Ports

Size

23 28

A, B
(plate 10)

Working port

Size

3/4 in

Standard

Dimensions according to SAE J518

Fastening thread 1)

M10 × 15; 17 mm deep

State on delivery

With protective cover (must be connected)

A, B
(plate 16)

Working port

Size

M27 × 2; 16 mm deep

Standard

DIN 3852

State on delivery

With protective cover (must be connected)

L

Drain port

Size

3/4-16 UNF-2B; 11 mm deep

Standard 2)

ISO 11926

State on delivery 3)

With protective cover (observe installation instructions)

L1

Drain port

Size

3/4-16 UNF-2B; 11 mm deep

Standard 2)

ISO 11926

State on delivery 3)

Plugged (observe installation instructions)
1) Thread according to DIN 13
2) The spot face can be deeper than specified in the appropriate standard.
3) Unless otherwise specified. Other layouts on request.

Sizes 37 and 45

Port plate 10

1) Flange ISO 3019-1

Port plate 16

1) Flange ISO 3019-1

Drive shafts

1) Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

Ports

Size

37 45

A, B
(plate 10)

Working port

Size

3/4 in

Standard

Dimensions according to SAE J518

Fastening thread 1)

M10 × 15; 17 mm deep

State on delivery

With protective cover (must be connected)

A, B
(plate 16)

Working port

Size

M27 × 2; 16 mm deep

Standard

DIN 3852

State on delivery

With protective cover (must be connected)

L

Drain port

Size

7/8-14 UNF-2B; 13 mm deep

Standard 2)

ISO 11926

State on delivery 3)

With protective cover (observe installation instructions)

L1

Drain port

Size

7/8-14 UNF-2B; 13 mm deep

Standard 2)

ISO 11926

State on delivery 3)

Plugged (observe installation instructions)
1) Thread according to DIN 13
2) The spot face can be deeper than specified in the appropriate standard.
3) Unless otherwise specified. Other layouts on request.

Sizes 58 and 63

Port plate 10

1) Flange ISO 3019-1

Port plate 16

1) Flange ISO 3019-1

Drive shafts

1) Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

Ports

Size

58 63

A, B
(plate 10)

Working port

Size

3/4 in

Standard

Dimensions according to SAE J518

Fastening thread 1)

M10 × 15; 17 mm deep

State on delivery

With protective cover (must be connected)

A, B
(plate 16)

Working port

Size

M27 × 2; 16 mm deep

Standard

DIN 3852

State on delivery

With protective cover (must be connected)

L

Drain port

Size

7/8-14 UNF-2B; 13 mm deep

Standard 2)

ISO 11926

State on delivery 3)

With protective cover (observe installation instructions)

L1

Drain port

Size

7/8-14 UNF-2B; 13 mm deep

Standard 2)

ISO 11926

State on delivery 3)

Plugged (observe installation instructions)
1) Thread according to DIN 13
2) The spot face can be deeper than specified in the appropriate standard.
3) Unless otherwise specified. Other layouts on request.

Installation instructions

General

  • During commissioning and operation, the axial piston unit must be filled with hydraulic fluid and air bled. This must also be observed following a relatively long standstill as the axial piston unit may drain back to the reservoir via the hydraulic lines.
  • The case drain fluid in the housing must be directed to the reservoir via the highest available drain port (L, L1).
  • If a shared drain line is used for several units, make sure that the respective case pressure is not exceeded. The shared drain line must be dimensioned to ensure that the maximum permissible case pressure of all connected units is not exceeded in any operating conditions, specifically on cold start. If this is not possible, separate reservoir lines must be laid as required.
  • To achieve favorable noise values, all connecting lines should be decoupled by using elastic elements and above-reservoir installation is to be avoided.
  • In all operating conditions, the drain line must flow into the reservoir below the minimum fluid level.

Installation position

See the following examples 1 to 4.

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

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

L1

2

L

Above-reservoir installation

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

Installation position

Air bleeding

Filling

3

F

L1 (F)

4

F

L (F)

Key

F

Filling / Air bleeding

L, L2

Drain port

SB

Baffle (baffle plate)

A, B

Working port

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.
  • 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.
  • During and shortly after operation, there is a risk of burns on the axial piston unit. Take appropriate safety measures (e.g. by wearing protective clothing).
Application scenarios