A2FE series 6x

Space-saving construction due to recessed mounting flange
Easy to install, simply slide into the mechanical gearbox
High power density
Very high total efficiency
High starting efficiency
Optional with integrated pressure relief valve
Optional with mounted addifitonal valve: counterbalance valve (BVD/BVE), flushing and boost-pressure valve
Bent-axis design

¹⁾	Please contact us.
²⁾	Specify ordering code of counterbalance valve according to data sheet 95522 (BVD) respectively data sheet 95525 (BVE) separately.
³⁾	Specify ordering code of sensor according to data sheet 95133 (DSA) respectively data sheet 95135 (HDD) separately.

Table of values

Size				28	32	45	56	63	80	90	107	125	160	180	250	355
Displacement geometric, per revolution		V_g	cm³	28.1	32	45.6	56.1	63	80.4	90	106.7	125	160.4	180	250	355
Nominal pressure		p_nom	bar	400	400	400	400	400	400	400	400	400	400	400	350	350
Maximum pressure		p_max	bar	450	450	450	450	450	450	450	450	450	450	450	400	400
Maximum speed		n_nom ¹⁾	rpm	6300	6300	5600	5000	5000	4500	4500	4000	4000	3600	3600	2700	2240
Maximum speed		n_max ²⁾	rpm	6900	6900	6200	5500	5500	5000	5000	4400	4400	4000	4000
Inlet flow ³⁾	at n_nom	q_V	l/min	177	202	255	281	315	362	405	427	500	577	648	675	795
Torque ⁴⁾	at p_nom	M	Nm	179	204	290	357	401	512	573	679	796	1021	1146	1393	1978
Rotary stiffness		c	kNm/rad	2.93	3.12	4.18	5.94	6.25	8.73	9.14	11.2	11.9	17.4	18.2	73.1	96.1
Moment of inertia for rotary group		J_TW	kg·m²	0.0012	0.0012	0.0024	0.0042	0.0042	0.0072	0.0072	0.0116	0.0116	0.022	0.022	0.061	0.102
Maximum angular acceleration		ɑ	rad/s²	6500	6500	14600	7500	7500	6000	6000	4500	4500	3500	3500	10000	8300
Case volume		V	l	0.2	0.2	0.33	0.45	0.45	0.55	0.55	0.8	0.8	1.1	1.1	2.5	3.5
Weight (approx.)		m	kg	10.5	10.5	15	18	19	23	25	34	36	47	48	82	110

¹⁾	These values are valid at: - for the optimum viscosity range from v_opt = 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"

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. Other permissible limit values, such as speed variation, reduced angular acceleration as a function of the frequency and the permissible angular acceleration at start (lower than the maximum angular acceleration) can be found in data sheet 90261.

Speed range

No limit to minimum speed n_min. If uniformity of motion is required, speed n_min must not be less than 50 rpm.

Determining the operating characteristics
Inlet flow		[l/min]
Rotational speed		[rpm]
Torque		[Nm]
Power		[kW]

Key
V_g	Displacement per revolution [cm³]
Δp	Differential pressure [bar]
n	Rotational speed [rpm]
η_v	Volumetric efficiency
η_hm	Hydraulic-mechanical efficiency
η_t	Total efficiency (η_t = η_v \u2022 η_hm)

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:

90220: Hydraulic fluids based on mineral oils and related hydrocarbons

90221: Environmentally acceptable hydraulic fluids

90222: Fire-resistant, water-free hydraulic fluids (HFDR, HFDU)

90223: Fire-resistan, water-containing hydraulic fluids (HFAE, HFAS, HFB, HFC)

90225: Restricted technical data for operation with fire-resistant hydraulic fluids

Viscosity and temperature of hydraulic fluids

	Viscosity	Shaft seal	Temperature¹⁾	Comment
Cold start	ν_max ≤ 1600 mm²/s	NBR²⁾	ϑ_St ≥ -40 °C	t ≤ 3 min, without load (p ≤ 50 bar), n ≤ 1000 rpm, permissible temperature difference between axial piston unit and hydraulic fluid max. 25 K
Cold start	ν_max ≤ 1600 mm²/s	FKM	ϑ_St ≥ -25 °C
Warm-up phase	ν = 400 \u2026 1600 mm²/s			t ≤ 15 min, p ≤ 0.7 \u2022 p_nom and n ≤ 0.5 \u2022 n_nom
Continuous operation	ν = 10 \u2026 400 mm²/s³⁾	NBR²⁾	ϑ ≤ +78 °C	measured at port T
	ν = 10 \u2026 400 mm²/s³⁾	FKM	ϑ ≤ +103 °C	measured at port T
	ν_opt = 16 \u2026 36 mm²/s			range of optimum operating viscosity and efficiency
Short-term operation	ν_min = 7 \u2026 10 mm²/s	NBR²⁾	ϑ ≤ +78 °C	t ≤ 3 min, p ≤ 0.3 \u2022 p_nom measured at port T
Short-term operation	ν_min = 7 \u2026 10 mm²/s	FKM	ϑ ≤ +103 °C	t ≤ 3 min, p ≤ 0.3 \u2022 p_nom measured at port T

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)

Note

To reduce high temperature of the hydraulic fluid in the axial piston unit we recommend the use of a flushing and boost pressure valve (see chapter Extended functions and versions).

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:

90245: Bosch Rexroth Fluid Rating List for Rexroth hydraulic components (pumps and motors)

The hydraulic fluid should be selected so that the operating viscosity in the operating temperature range is within the optimum range (ν_opt; 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 (high-pressure side)			Definition
Nominal pressure	p_nom	see table of values	The nominal pressure corresponds to the maximum design pressure.
Maximum pressure	p_max	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		10 s
Total operating period		300 h
Minimum pressure	p_HP min	25 bar	Minimum pressure on high-pressure side (port A or B) required to prevent damage to the axial piston unit.
Minimum pressure at inlet (pump operating mode)	p_E min	see diagram	To prevent damage to the axial piston motor in pump mode (change of high-pressure side with unchanged direction of rotation, e.g. when braking),a minimum pressure must be guaranteed at the working port (inlet). The minimum pressure depends on the rotational speed and displacement of the axial piston unit.
Total pressure	p_Su	700 bar	The summation pressure is the sum of the pressures at both work ports (A and B).
Rate of pressure change			Definition
with integrated pressure relief valve	R_A max	9000 bar/s	Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range.
without pressure relief valve	R_A max	16000 bar/s
Case pressure at port T			Definition
Continuous differential pressure	Δp_T _cont	2 bar	Maximum averaged differential pressure at the shaft seal (case to ambient)
Pressure peaks	p_T _peak	10 bar	t < 0.1 s

Note

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

Minimum pressure at inlet (pump operating mode)

This diagram is only valid for the optimum viscosity range of v_opt = 16 to 36 mm²/sec..

If the above mentioned conditions cannot be ensured, please contact us.

Pressure definition

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

Rate of pressure change

Maximum differential pressure at the shaft seal

Note

The service life of the shaft seal is influenced by the speed of the axial piston unit and the case pressure.

The service life decreases with an increase of the mean differential pressure between the case and the ambient pressure and with a higher frequency of pressure spikes.

The case pressure must be equal to or higher than the ambient pressure.

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			28		32	45	56		63	80		90	107		125	160		180	250	355
Drive shaft	Code		Z	A	A	Z	Z	A	A	Z	A	A	Z	A	A	Z	A	A	Z	Z
Drive shaft	⌀	mm	25	30	30	30	30	35	35	35	40	40	40	45	45	45	45	50	50	60
Maximum radial force at distance a (from shaft collar)	F_q max	kN	5.7	5.4	5.4	7.6	7.8	9.1	9.1	11.1	11.4	11.4	13.6	14.1	14.1	18.1	18.3	18.3	1.2 ¹⁾	1.5 ¹⁾
Maximum radial force at distance a (from shaft collar)	a	mm	16	16	16	18	18	18	18	20	20	20	20	20	20	25	25	25	41	52.5
Permitted torque at F_q max	T_q max	Nm	179	179	204	290	294	357	401	488	512	573	679	679	796	1021	1021	1146
Permitted differential pressure at F_q max	Δp_q max	bar	400	400	400	400	330	400	400	380	400	400	400	400	400	400	400	400
Maximum axial force, when standstill or in non-pressurized conditions	+ F_ax max	N	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	- F_ax max	N	500	500	500	630	800	800	800	1000	1000	1000	1250	1250	1250	1600	1600	1600	2000	2500
Maximum axial force, per bar operating pressure	+ F_ax max	N/bar	5.2	5.2	5.2	7	8.7	8.7	8.7	10.6	10.6	10.6	12.9	12.9	12.9	16.7	16.7	16.7

¹⁾	When at a standstill or when axial piston unit operating in non-pressurized conditions. Higher forces are permissible when under pressure, please contact us.

General instructions

The values given are maximum values and do not apply to continuous operation.

The axial force in direction −F_ax is to be avoided as the service life of the bearing is reduced.

Special requirements apply in the case of belt drives. Please contact us.

Notes for sizes 250 ... 355:

In case of radial forces limited performance data is valid. Please contact us.

In case of axial forces during operation of the unit please contact us.

Effect of radial force F_qon the service life of bearings

By selecting a suitable direction of radial force F_q the load on the bearings caused by the internal rotary group forces can be reduced, thus optimizing the service life of the bearings. Recommended position of mating gear is dependent on direction of rotation. Examples:

Toothed gear drive, size 28 \u2026 180

Toothed gear drive, size 250 \u2026 355

1	Direction of rotation "counter-clockwise", pressure at port B
2	Direction of rotation "clockwise", pressure at port A
3	Direction of rotation "bidirectional"

Long-Life bearing

Sizes 250 and 355

For long service life and use with HF hydraulic fluids. Identical external dimensions as version with standard bearings. Subsequent conversion to long-life bearings is possible.

Size	28	32	45	56	63	80	90	107	125	160	180	250	355
Displacement geometric, per revolution	V_g	cm³	28.1	32	45.6	56.1	63	80.4	90	106.7	125	160.4	180	250	355
Nominal pressure	p_nom	bar	400	400	400	400	400	400	400	400	400	400	400	350	350
Maximum pressure	p_max	bar	450	450	450	450	450	450	450	450	450	450	450	400	400
Maximum speed	n_nom ¹⁾	rpm	6300	6300	5600	5000	5000	4500	4500	4000	4000	3600	3600	2700	2240
n_max ²⁾	rpm	6900	6900	6200	5500	5500	5000	5000	4400	4400	4000	4000
Inlet flow ³⁾	at n_nom	q_V	l/min	177	202	255	281	315	362	405	427	500	577	648	675	795
Torque ⁴⁾	at p_nom	M	Nm	179	204	290	357	401	512	573	679	796	1021	1146	1393	1978
Rotary stiffness	c	kNm/rad	2.93	3.12	4.18	5.94	6.25	8.73	9.14	11.2	11.9	17.4	18.2	73.1	96.1
Moment of inertia for rotary group	J_TW	kg·m²	0.0012	0.0012	0.0024	0.0042	0.0042	0.0072	0.0072	0.0116	0.0116	0.022	0.022	0.061	0.102
Maximum angular acceleration	ɑ	rad/s²	6500	6500	14600	7500	7500	6000	6000	4500	4500	3500	3500	10000	8300
Case volume	V	l	0.2	0.2	0.33	0.45	0.45	0.55	0.55	0.8	0.8	1.1	1.1	2.5	3.5
Weight (approx.)	m	kg	10.5	10.5	15	18	19	23	25	34	36	47	48	82	110

Determining the operating characteristics
Inlet flow		[l/min]
Rotational speed		[rpm]
Torque		[Nm]
Power		[kW]

Key
V_g	Displacement per revolution [cm³]
Δp	Differential pressure [bar]
n	Rotational speed [rpm]
η_v	Volumetric efficiency
η_hm	Hydraulic-mechanical efficiency
η_t	Total efficiency (η_t = η_v \u2022 η_hm)

	Viscosity	Shaft seal	Temperature¹⁾	Comment
Cold start	ν_max ≤ 1600 mm²/s	NBR²⁾	ϑ_St ≥ -40 °C	t ≤ 3 min, without load (p ≤ 50 bar), n ≤ 1000 rpm, permissible temperature difference between axial piston unit and hydraulic fluid max. 25 K
FKM	ϑ_St ≥ -25 °C
Warm-up phase	ν = 400 \u2026 1600 mm²/s			t ≤ 15 min, p ≤ 0.7 \u2022 p_nom and n ≤ 0.5 \u2022 n_nom
Continuous operation	ν = 10 \u2026 400 mm²/s³⁾	NBR²⁾	ϑ ≤ +78 °C	measured at port T
FKM	ϑ ≤ +103 °C
ν_opt = 16 \u2026 36 mm²/s			range of optimum operating viscosity and efficiency
Short-term operation	ν_min = 7 \u2026 10 mm²/s	NBR²⁾	ϑ ≤ +78 °C	t ≤ 3 min, p ≤ 0.3 \u2022 p_nom measured at port T
FKM	ϑ ≤ +103 °C

Pressure at working port A or B (high-pressure side)	Definition
Nominal pressure	p_nom	see table of values	The nominal pressure corresponds to the maximum design pressure.
Maximum pressure	p_max	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	10 s
Total operating period	300 h
Minimum pressure	p_HP min	25 bar	Minimum pressure on high-pressure side (port A or B) required to prevent damage to the axial piston unit.
Minimum pressure at inlet (pump operating mode)	p_E min	see diagram	To prevent damage to the axial piston motor in pump mode (change of high-pressure side with unchanged direction of rotation, e.g. when braking),a minimum pressure must be guaranteed at the working port (inlet). The minimum pressure depends on the rotational speed and displacement of the axial piston unit.
Total pressure	p_Su	700 bar	The summation pressure is the sum of the pressures at both work ports (A and B).
Rate of pressure change	Definition
with integrated pressure relief valve	R_A max	9000 bar/s	Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range.
without pressure relief valve	R_A max	16000 bar/s
Case pressure at port T	Definition
Continuous differential pressure	Δp_T _cont	2 bar	Maximum averaged differential pressure at the shaft seal (case to ambient)
Pressure peaks	p_T _peak	10 bar	t < 0.1 s

Direction of rotation, viewed on drive shaft
clockwise	counter-clockwise
A to B	B to A

Size	28	32	45	56	63	80	90	107	125	160	180	250	355
Drive shaft	Code	Z	A	A	Z	Z	A	A	Z	A	A	Z	A	A	Z	A	A	Z	Z
⌀	mm	25	30	30	30	30	35	35	35	40	40	40	45	45	45	45	50	50	60
Maximum radial force at distance a (from shaft collar)		F_q max	kN	5.7	5.4	5.4	7.6	7.8	9.1	9.1	11.1	11.4	11.4	13.6	14.1	14.1	18.1	18.3	18.3	1.2 ¹⁾	1.5 ¹⁾
a	mm	16	16	16	18	18	18	18	20	20	20	20	20	20	25	25	25	41	52.5
Permitted torque at F_q max	T_q max	Nm	179	179	204	290	294	357	401	488	512	573	679	679	796	1021	1021	1146
Permitted differential pressure at F_q max	Δp_q max	bar	400	400	400	400	330	400	400	380	400	400	400	400	400	400	400	400
Maximum axial force, when standstill or in non-pressurized conditions		+ F_ax max	N	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
- F_ax max	N	500	500	500	630	800	800	800	1000	1000	1000	1250	1250	1250	1600	1600	1600	2000	2500
Maximum axial force, per bar operating pressure	+ F_ax max	N/bar	5.2	5.2	5.2	7	8.7	8.7	8.7	10.6	10.6	10.6	12.9	12.9	12.9	16.7	16.7	16.7

Size 28 ... 180

Port plate 10

¹⁾	To shaft collar
²⁾	The O-ring is not included in the delivery contents.

Size	D1		D2	D3	D4	D5	D7	D8	D9	D10	D11	D14	D15	D16	D17	D18	D21	D27	D28	D29	D31	D32	D33	D34	D36	D37	D40	D41	D42	D46	O-Ring
Size	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
28	135	0 - 0.025	94	114	106	71	188	16	15	88.8	87.1	91	94	10	27	45	95	154	160	14	5.2	106	115	40	42	13	18.2	40.5	13	59	Ø126 × 4
32	135	0 - 0.025	94	114	106	71	188	16	15	88.8	87.1	91	94	10	27	45	95	154	160	14	5.2	106	115	40	42	13	18.2	40.5	13	59	Ø126 × 4
45	160	0 - 0.025	118.5	133	119	82	235	18	15	92.3	90	102	109	10	31.3	50	106	190	200	18	5.2	118	147	49	47.5	15	23.8	50.8	19	75	Ø150 × 4
56	160	0 - 0.025	121	146	130	82	235	18	15	92.3	90	107	122	10	34	59	109	190	200	18	5.2	128	147	48	36	0	23.8	50.8	19	75	Ø150 × 4
63	160	0 - 0.025	121	146	130	82	235	18	15	92.3	90	107	122	10	34	59	109	190	200	18	5.2	128	147	48	36	0	23.8	50.8	19	75	Ø150 × 4
80	190	0 - 0.029	140.3	157	145	98	260	20	15	110	106	121	127	10	41	54	123	220	224	22	5.2	138	166	60	40	0	27.8	57.2	25	84	Ø180 × 4
90	190	0 - 0.029	140.3	157	145	98	260	20	15	110	106	121	127	10	41	54	123	220	224	22	5.2	138	166	60	40	0	27.8	57.2	25	84	Ø180 × 4
107	200	0 - 0.029	152.3	178	157	103	286	20	15	122.8	119	136	143	16	41	58	135	232	250	22	5.2	150	194	70	40	0	31.8	66.7	32	99	Ø192 × 4
125	200	0 - 0.029	152.3	178	157	103	286	20	15	122.8	119	136	143	16	41	58	135	232	250	22	5.2	150	194	70	40	0	31.8	66.7	32	99	Ø192 × 4
160	200	0 - 0.029	171.6	206	185	104	286	20	15	122.8	119.3	149	169	12	47	75	134	232	250	22	5.2	180	194	70	42	0	31.8	66.7	32	99	Ø192 × 4
180	200	0 - 0.029	171.6	206	185	104	286	20	15	122.8	119.3	149	169	12	47	75	134	232	250	22	5.2	180	194	70	42	0	31.8	66.7	32	99	Ø192 × 4

Note

The dimensional drawings of the port plates with valves can be found in the chapter "Extended functions and versions".

Drive shafts Z and A

¹⁾	Center bore according to DIN 332 (thread according to DIN 13)

Splined shaft DIN 5480

NG	Code	Designation	Thread G	N2	N3	N4	N5	ØN6
NG	Code	Designation	Thread G	mm	mm	mm	mm	mm
28	Z	W25×1.25×18×9g	M8 × 1.25	6	19	28	43	35
28	A	W30×2×14×9g	M10 × 1.5	7.5	22	27	35	35
32	A	W30×2×14×9g	M10 × 1.5	7.5	22	27	35	35
45	Z	W30×2×14×9g	M12 × 1.75	9.5	28	27	35	35
56	Z	W30×2×14×9g	M12 × 1.75	9.5	28	27	35	40
56	A	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	40
63	A	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	40
80	Z	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	45
80	A	W40×2×18×9g	M16 × 2	12	36	37	45	45
90	A	W40×2×18×9g	M16 × 2	12	36	37	45	45
107	Z	W40×2×18×9g	M12 × 1.75	9.5	28	37	45	50
107	A	W45×2×21×9g	M16 × 2	12	36	42	50	50
125	A	W45×2×21×9g	M16 × 2	12	36	42	50	50
160	Z	W45×2×21×9g	M16 × 2	12	36	42	50	60
160	A	W50×2×24×9g	M16 × 2	12	36	44	55	60
180	A	W50×2×24×9g	M16 × 2	12	36	44	55	60

Ports

Size			28	32	45	56	63	80	90	107	125	160	180
A, B	Working port	Size	1/2 in		3/4 in			1 in		1 1/4 in
		Standard	Dimensions according to SAE J518
		Fastening thread ¹⁾	M8 × 1.25; 15 mm deep		M10 × 1.5; 17 mm deep			M12 × 1.75; 17 mm deep		M14 × 2; 19 mm deep
		State on delivery	With protective cover (must be connected)
T₁	Drain port	Size	M16 × 1.5; 12 mm deep		M18 × 1.5; 12 mm deep							M22 × 1.5; 14 mm deep
		Standard ²⁾	DIN 3852
		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.

Size 250

¹⁾	To shaft collar
²⁾	The O-ring is not included in the delivery contents.

¹⁾	Center bore according to DIN 332 (thread according to DIN 13)

Ports

Size			250
A, B	Working port	Size	1 1/4 in
		Standard	Dimensions according to SAE J518
		Fastening thread ¹⁾	M14 × 2; 19 mm deep
		State on delivery	With protective cover (must be connected)
T₁	Drain port	Size	M22 × 1.5; 14 mm deep
		Standard ²⁾	DIN 3852
		State on delivery ³⁾	With protective cover (observe installation instructions)
T₂	Drain port	Size	M22 × 1.5; 14 mm deep
		Standard ²⁾	DIN 3852
		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.

Size 355

¹⁾	To shaft collar
²⁾	Flange ISO 3019-2

¹⁾	Center bore according to DIN 332 (thread according to DIN 13)

Ports

Size			355
A, B	Working port	Size	1 1/4 in
		Standard	Dimensions according to SAE J518
		Fastening thread ¹⁾	M14 × 2; 22 mm deep
		State on delivery	With protective cover (must be connected)
T₁	Drain port	Size	M33 × 2; 18 mm deep
		Standard ²⁾	DIN 3852
		State on delivery ³⁾	With protective cover (observe installation instructions)
T₂	Drain port	Size	M33 × 2; 18 mm deep
		Standard ²⁾	DIN 3852
		State on delivery ³⁾	Plugged (observe installation instructions)
M_A, M_B	Measuring port pressure A, B	Size	M14 × 1.5; 12 mm deep
		Standard ²⁾	DIN 3852
		State on delivery	Plugged

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.

NG	Code	Designation	Thread G	N2	N3	N4	N5	ØN6
28	Z	W25×1.25×18×9g	M8 × 1.25	6	19	28	43	35
A	W30×2×14×9g	M10 × 1.5	7.5	22	27	35	35
32	A	W30×2×14×9g	M10 × 1.5	7.5	22	27	35	35
45	Z	W30×2×14×9g	M12 × 1.75	9.5	28	27	35	35
56	Z	W30×2×14×9g	M12 × 1.75	9.5	28	27	35	40
A	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	40
63	A	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	40
80	Z	W35×2×16×9g	M12 × 1.75	9.5	28	32	40	45
A	W40×2×18×9g	M16 × 2	12	36	37	45	45
90	A	W40×2×18×9g	M16 × 2	12	36	37	45	45
107	Z	W40×2×18×9g	M12 × 1.75	9.5	28	37	45	50
A	W45×2×21×9g	M16 × 2	12	36	42	50	50
125	A	W45×2×21×9g	M16 × 2	12	36	42	50	50
160	Z	W45×2×21×9g	M16 × 2	12	36	42	50	60
A	W50×2×24×9g	M16 × 2	12	36	44	55	60
180	A	W50×2×24×9g	M16 × 2	12	36	44	55	60

Size	28	32	45	56	63	80	90	107	125	160	180
A, B	Working port	Size	1/2 in	3/4 in	1 in	1 1/4 in
Standard	Dimensions according to SAE J518
Fastening thread ¹⁾	M8 × 1.25; 15 mm deep	M10 × 1.5; 17 mm deep	M12 × 1.75; 17 mm deep	M14 × 2; 19 mm deep
State on delivery	With protective cover (must be connected)
T₁	Drain port	Size	M16 × 1.5; 12 mm deep	M18 × 1.5; 12 mm deep	M22 × 1.5; 14 mm deep
Standard ²⁾	DIN 3852
State on delivery ³⁾	Plugged (observe installation instructions)

Size	250
A, B	Working port	Size	1 1/4 in
Standard	Dimensions according to SAE J518
Fastening thread ¹⁾	M14 × 2; 19 mm deep
State on delivery	With protective cover (must be connected)
T₁	Drain port	Size	M22 × 1.5; 14 mm deep
Standard ²⁾	DIN 3852
State on delivery ³⁾	With protective cover (observe installation instructions)
T₂	Drain port	Size	M22 × 1.5; 14 mm deep
Standard ²⁾	DIN 3852
State on delivery ³⁾	Plugged (observe installation instructions)

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 (T₁,T₂).

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 6.

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.

¹⁾	Standard for sizes 250 and 355, special version for sizes 28 to 180.
²⁾	Piping suggestion without port T₂(sizes 28 to 180)
³⁾	Piping suggestion with Port T₂ (sizes 250 to 355).

Above-reservoir installation

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

¹⁾	Standard for sizes 250 and 355, special version for sizes 28 to 180.
²⁾	Installation position only permissible if port T₂ is fitted (sizes 250 and 355).

Installation position	Air bleeding	Filling
1	\u2012	T₁
2	\u2012	T₁(NG28 bis 180) T₂(NG250 und 355)
3	\u2012	T₁
4	(F)	T₁, (F)
5	(F)	T₂, (F)
6	(F)	T₁, (F)

Key
F	Filling / Air bleeding
T₁, T₂	Drain port
h_t min	Minimum required immersion depth (200 mm)
h_min	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. MTTF_D) 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 p_max (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.

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A2FE series 6x

Table of values