Rexroth A2FO125/61L-VAB05 Axial Piston Hydraulic Pump

The Rexroth A2FO125/61L-VAB05 Axial Piston Hydraulic Pump is designed with high performance version, to meet your industrial operation for process flow. The pump features compact design and high efficiency in performance, best suitable for applications requiring longer life span and pressure capability.

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Features

Dimensions

Type code

Technical data

Operating pressure range

Rexroth A2FO125/61L-VAB05 Axial Piston Hydraulic Pump Service Manual

Features

All-purpose high pressure pump
Robust pump with long service life
High power density
Compact dimensions
Very high total efficiency
Robust 40° bent-axis technology

Dimensions

Ports		Standard	Size	pmax [bar]3)	State6)
A, B	Working port Fastening thread	SAE J5182)	1 1/4 in M14 × 2; 23 deep	450	0
S	Suction port Fastening thread	SAE J5182)	1 1/2 in M12 × 1.75; 23 deep	30	0
T1	Drain port	DIN 38525)	M18 x 1.5; 12 deep	3	X4)
T2	Drain port	DIN 38525)	M18x 1.5; 12 deep	3	O4)
R	Air bleed port	DIN 38525)	M12 x 1.5; 12 deep	3	X

1) To shaft collar
2) Only dimensions according to SAE J518, metric fastening thread is a deviation from the standard.
3) Depending on the application, momentary pressure peaks can occur.Keep this in mind when selecting measuring devices and fittings.
4) Depending on installation position, T1 or T2 must be connected
5) The countersink can be deeper than as specified in the standard.
6) O = Must be connected (plugged on delivery) X = Plugged (in normal operation)

Type code

Technical data

Displacement geometric, per revolution		Vg	cm³	44.9	56.6	63	79.8	90.5	106.7	125
Nominal pressure		pnom	bar	400	400	400	400	400	400	400
Maximum pressure		pmax	bar	450	450	450	450	450	450	450
Maximum speed		nnom 1)	rpm	2240	2000	2000	1800	1800	1600	1600
Maximum speed		nmax 2)	rpm	4250	3750	3750	3350	3350	3000	3000
Flow	at nnom	qV	l/min	101	113	126	144	163	171	200
Torque	at pnom	M	Nm	286	360	401	508	576	679	796
Rotary stiffness		c	kNm/rad	4.65	6.97	8.11	9.1	9.69	12.49	13.65
Moment of inertia for rotary group		JTW	kg·m²	0.0033	0.0034	0.0035	0.0056	0.0058	0.0088	0.0091
Case volume		V	l	0.6	0.6	0.6	0.65	0.65	1.1	1.1
Weight (approx.)		m	kg	17	17	17	23	23	32.8	32.8

1) The values are applicable:
– at an abs. pressure pabs = 1 bar at the suction port S
– for the optimum viscosity range of vopt = 36 to 16 mm2/s
– with hydraulic fluid on the basis of mineral oils
2) Maximum speed (limiting speed) with increased inlet pressure pabs at suction port S, see the following diagram.

Viscosity and temperature of hydraulic fluids

Cold start	νmax ≤ 1600 mm²/s	NBR2)	ϑSt ≥ -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	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 T
		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 • pnommeasured at port T
		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 diagram

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

Nominal pressure	pnom	400 bar	The nominal pressure corresponds to the maximum design pressure.
Maximum pressure	pmax	450 bar	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	pHP min	25 bar	Minimum pressure on high-pressure side (port A or B) required to prevent damage to the axial piston unit.
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.
Minimum pressure	ps min	0.8 bar absolute	Minimum pressure at inlet (suction port S) that is required to avoid damage to the axial piston unit. The minimum required pressure is dependent on the speed of the axial piston unit. (see diagram “Maximum speed”)
Maximum pressure	ps max	30 bar absolute
Continuous differential pressure	ΔpT cont	2 bar	Maximum averaged differential pressure at the shaft seal (case to ambient pressure)
Pressure peaks	pT peak	10 bar	t < 0.1 s