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Hydraulic Electro Proportional Control Variable Displacement Piston Motor A10FM

Hydraulic Electro Proportional Control Variable Displacement Piston Motor A10FM

1.Torque increases with pressure gradient between high and low pressure sides

2.Suitable for walking machinery and industrial applications

3.Allows high output speeds

4.Mature A10 rotating component technology

5.Mechanical and hydraulic connections comply with SAE standards

6.Optional built-in anti-cavitation valve, that is, fan drive unit

Detailed description

This motor has a clear torque variation rule: its torque increases with the pressure gradient between the high and low pressure sides. The larger the pressure difference between the two sides, the greater the output torque, which ensures that the motor can provide sufficient power to drive heavy loads stably, even in high-pressure working scenarios, avoiding stalling or performance degradation. It is widely suitable for walking machinery and industrial applications, including construction machinery, agricultural equipment, and industrial hydraulic stations, adapting well to the harsh working environment of walking machinery and the stable operation requirements of industrial equipment. The motor allows high output speeds, enabling efficient power transmission and meeting the needs of high-speed operation scenarios, while maintaining stable performance without excessive vibration or noise. It adopts mature A10 rotating component technology, which has undergone long-term practical verification, featuring high reliability, low wear, and stable operation, effectively reducing failure rates and extending the motor’s service life. Its mechanical and hydraulic connections comply with SAE standards, ensuring good compatibility and interchangeability, facilitating installation, maintenance, and replacement with other standard components. Additionally, it is optionally equipped with a built-in anti-cavitation valve, which also serves as a fan drive unit, effectively preventing cavitation damage to the motor and ensuring the normal operation of the fan system, enhancing the overall reliability of the equipment.

Ordering code for standard program

A10F	M		/	52		－	V		C
01	02	03		04	05		06	07	08	09	10	11

Axial piston unit

Swashplate design, fixed displacement, nominal pressure 280 bar, maximum pressure 350 bar

A10F

Operating mode

Motor, open and closed circuit

Size (NG)

Theoretical displacement

018

023

028

037

045

058

063

Series

Series 5, Index 2

Direction of rotation

05	Viewed on drive shaft	clockwise	R¹⁾
		counter clockwise	L¹⁾
		bidirectional	W

Seals

FKM (Fluoro-rubber)

Drive shaft

		018	023	028	037	045	058	063
07	Splined shaft to ISO 3019-1 (SAE J744)	○	●	●	●	●	●	●	R
	Splined shaft to ISO 3019-1 (SAE J744)	–	○	○	●	●	●	●	W
	Tapered with woodruff key and threaded end	○	●	●	●	●	●	●	C

Mounting flange

		018	023	028	037	045	058	063
08	SAE 2-hole	○	●	●	●	●	●	●	C

Ports for service lines

		018	023	028	037	045	058	063
09	SAE-flange ports A and B on side, same side Mounting bolts metric	－	●	●	●	●	●	●	10N00
09	Threaded ports A and B,metric, on side, same side	○	●	●	●	●	●	●	16N00

Ventile

		018	023	028	037	045	058	063
10	Without valves	○	●	●	●	●	●	●	0
	With integrated flushing valve	－	●	●	●	●	●	●	7
	With integrated anti cavitation valve	○	●	●	●	●	●	●	2

Speed sensor

		018	023	028	037	045	058	063
11	Without speed sensor	○	●	●	●	●	●	●
11	Prepared for speed sensor (for inductive speed sensor ID)	○	●	●	●	●	○	○	D

•=available ○=on request — =not available

1）Only necessary in conjunction with valve configuration "2" (integrated anti cavitation valve)

A10F	E		/	52		－	V
01	02	03		04	05		06	07	08	09	10	11

Axial piston unit

Swashplate design, fixed displacement, nominal pressure 280 bar, maximum pressure 350 bar

A10F

Operating mode

Motor, open and closed circuit

Size (NG)

Theoretical displacement

010

011

014

016

018

023

028

037

045

058

063

Series

Series 5, Index 2

Direction of rotation

05	Viewed on drive shaft	clockwise	R¹⁾
		counter clockwise	L¹⁾
		bidirectional	W

Seals

FKM (Fluoro-rubber)

Drive shaft

010

011

014

016

018

023

028

037

045

058

063

Splined shaft to ISO 3019-1 (SAE J744)

○

●

Splined shaft to ISO 3019-1 (SAE J744)

–

●

Tapered with woodruff key and threaded end

●

Mounting flange

010

011

014

016

018

023

028

037

045

058

063

SAE 2-hole

●

－

C²⁾

Special 2-hole

－

●

Special 8-hole

－

●

－

Ports for service lines

010

011

014

016

018

023

028

037

045

058

063

SAE-flange ports A and B, on side, same side mounting bolts metric

－

●

10N00

Threaded ports A and B,metric, on side, same side

●

16N00

Ventile

010

011

014

016

018

023

028

037

045

058

063

Without valves

○

●

○

●

With integrated flushing valve

－

●

With integrated anti cavitation valve

●

Speed sensor

010

011

014

016

018

023

028

037

045

058

063

Without speed sensor

●

Prepared for speed sensor (for inductive speed sensor ID)

–

○

●

○

•=available ○=on request — =not available

1)Only necessary in conjunction with valve configuration "2" (integrated anti cavitation valve)

2)R-shaft with C-flange on sizes 10 to 18 in preparation

Technical data

Fluids

Prior to project design, please see our technical data sheets RE 90220 (mineral oil) and RE 90221 (environmentally acceptable fluids) for detailed information on fluids and operating conditions.

For operation on environmentally acceptable fluids please consult us (when ordering, please state in clear text the fluid to be used).

Operating viscosity range

To achieve optimum values for efficiency and service life we recommend an operation viscosity (at operating temperature)within the range,

ν_opt = opt. operating viscosity 16...36 mm²/s

referred to the tank temperature (open circuit).

Limit of viscosity range

For critical operation conditions the following values apply:

ν_min=5 mm²/s (closed circuit)

10 mm²/s (open circuit)

for short periods (t ≤ 1 min)

at a max. perm. temperature of 115 ℃.

Please note that the max. leakage fluid temperature of 115 ℃ is also not exceeded in certain areas (for instance bearing area).The fluid temperature in the bearing area is approx.5 K higher than the average leakage fluid temperature

ν_max=1600 mm²/s
for short periods (t≤1 min)
on cold start
(t_min =p≤ 30 bar, n ≤ 1000 min^-1,-25 °C).

At temperatures between -40℃ and -25℃ special measures are required, please consult us for further information.For detailed information on operation with low temperatures see data sheet RE 90300-03-B.

Selection diagram

Notes on the selection of the hydraulic fluid

In order to select the correct fluid, it is necessary to know the operating temperature in the tank (open circuit) in relation to the ambient temperature.

The fluid should be selected so that within the operating temperature range, the viscosity lies within the optimum range (ν_opt),see shaded section of the selection diagram. We recommend to select the higher viscosity grade in each case.

Example: at an ambient temperature of X℃ the operating temperature in the tank is 60℃. In the optimum viscosity range(ν_opt; shaded area) this corresponds to viscosity grades VG 46 resp. VG 68; VG 68 should be selected.

Important:

The leakage oil (case drain oil) temperature is influenced by pressure and input speed and is always higher than the tank temperature. However, at no point of the component may the temperature exceed 115℃.

If it is not possible to comply with the above conditions because of extreme operating parameters please consult us.

Filtration of the hydraulic fluid

Filtration improves the cleanliness level of the hydraulic fluid,which, in turn, increases the service life of the axial piston unit.

To ensure the functional reliability of the axial piston unit, a gravimetric evaluation is necessary for the hydraulic fluid to determine the amount of contamination by solid matter and to determine the cleanliness level according to ISO 4406.A cleanliness level of at least 20/18/15 to ISO 4406 is to be maintained.

If above requirements cannot be maintained please consult us.

Operating pressure range

Pressure at service line port (pressure port) A or B

Nominal pressure Pnom	280 bar absolute
Maximum pressure Pmax	350 bar absolute
Single operating period	2,5 ms
Total operating period	300 h
Minimum pressure (high pressure side)	10 bar2)
Rate of pressure change RA max	16000 bar/s

Outlet pressure

at nmax
Minimum pressure at low pressure side Pabs max	18 bar

Case drain pressure

Maximum permissible case drain pressure

(at port L, L₁):

P_{max abs} motor operation in open circuit	4 bar _abs
P_{max abs} motor operation in closed circuit	4 bar _abs
P_{max abs} pump/motor operation in open circuit	2 bar _abs

Direction of flow

viewed on drive shaft
clockwise rotation			counter clockwise rotation
A to B			B to A

Definitions

Nominal pressure P_nom

The nominal pressure corresponds to the maximum design

pressure.

Maximum pressure P_max

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.

Minimum pressure (high-pressure side)

Minimum pressure at the high pressure side (A or B) which is required in order to prevent damage to the axial piston unit.

Rate of pressure change R_A

Maximum permissible rate of pressure rise and pressure reduction during a pressure change, over the entire pressure range.

Total operating period =t₁ + t₂ +... + t_n

^1）Other values on request

^2）Lower pressures time dependent, please consult us.

Table of values (theoretical values, without efficiency and tolerances: value rounded)

Size		NG		010	011	014	016	018	023
Displacement		V_{g max}	cm³	10.6	11.5	14.1	16.1	18	23.5
Speed¹⁾				5000	4200	4200	4200	4200	4900
at V_{g max}		n_nom	rpm
Input flow				53	48	59	68	76	115
at n_nom		q_{v max}	L/min
Power				24.7	22.5	27.6	31.6	35.3	53.6
at n_nom, Δp= 280 bar		P_max	kW
Actual starting torque				37.5	30	45	53	67.5	75
at n= 0 rpm, Δp = 280 bar			Nm
Torque				47	51	63	72	80	105
at V_{g max}	Δp = 280 bar	T_max	Nm
Torsional stiffness	R	c	Nm/rad	－	－	－	－	14835	28478
Drive shaft	W	c	Nm/rad	－	－	－	－	－	－
	C	c	Nm/rad	15084	18662	18662	18662	18662	30017
Moment of inertia rotary group		J_TW	kgm²	0.0006	0.00093	0.00093	0.00093	0.00093	0.0017
Maximum angular acceleration		α	rad/s²	8000	6800	6800	6800	6800	5500
Case volume		V	L	0.1	0.15	0.15	0.15	0.15	0.6
Weight approx.		m	kg	5	6.5	6.5	6.5	6.5	12

Size		NG		028	037	045	058	063
Displacement		V_{g max}	cm³	28.5	11.5	14.1	16.1	18
Speed¹⁾
at V_{g max}		n_nom	rpm	4700	4200	4000	3600	3400
Input flow				134	154	178	209	215
at n_nom		q_{v max}	L/min
Power				62.5	71.8	83.1	97.4	100.1
at n_nom, Δp= 280 bar		P_max	kW
Actual starting torque				105	125	170	205	230
at n= 0 min^-1, Δp = 280 bar			Nm
Torque				127	163	198	258	281
at V_{g max}	Δp = 280 bar	T_max	Nm
Torsional stiffness	R	c	Nm/rad	28478	46859	46859	80590	80590
Drive shaft	W	c	Nm/rad	－	38489	38489	60907	60907
	C	c	Nm/rad	30017	46546	46546	87667	87667
Moment of inertia rotary group		J_TW	kgm²	0.0017	0.0033	0.0033	0.0056	0.0056
Maximum angular acceleration		α	rad/s²	5500	4000	4000	3300	3300
Case volume		V	L	0.6	0.7	0.7	0.8	0.8
Weight approx.		m	kg	12	17	17	22	22

1)for maximum speed an outlet pressure (in low pressure side) of 18 bar is required

Note

Operation above the maximum values or below the minimum values may result in a loss of function, a reduced service life or in the destruction of the axial piston unit We recommend testing the loads by means of experiment or calculation/ simulation and comparison with the permissible values.

Permissible motor speed in relation to outlet pressure

Determination of motor size (NG)

Input flow	q_v=(V_g∙n)/(1000∙η_v)	[L/min]	V_g=Displacement per revolution in cm³ Δp=Differential pressure in bar n=speed in rpm η_v=Volumetric efficiency η_mh=Mechanical-hydraulic efficiency η_t=Overall efficiency (η_t= η_v ∙η_mh) T_K=Torque constant
Torque	T=(1,59∙V_g∙ Δp∙η_mh)/100	[Nm]
or	T=T_k∙ Δp∙η_mh
Power	P=(2π∙T∙n)/60000=(q_v∙Δp∙η_t)/600	[kW]
Output speed	n=(q_v∙1000∙η_v)/V_g	[rpm]

Permissible radial and axial forces on the drive shaft

Max. radial force at X/2	Drive shaft R; W	Drive shaft C	F_{q max}	N	250	350	350	350	350	1200

Maximum axial force			± F_{ax max}	N	400	700	700	700	700	1000

Size			NG		28	37	45	58	63
Max. radial force at X/2	Drive shaft R; W	Drive shaft C	F_{q max}	N	1200	1500	1500	1700	1700

Maximum axial force			± F_{ax max}	N	1000	1500	1500	2000	2000

A10FM 58