Rexroth A2FE/125 61W VZL 188 Motor

The Rexroth A2FE/125 61W VZL 188 Motor is a direct drive double shaft pump which is used to convey the oil. This motor has high efficiency and low noise levels. The motor is designed with balanced casing, ensuring smooth operation even in harsh conditions. It also contains a smart cooling feature that protects the motor from overheating or seizing.

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Features

Type code

Dimensions

Technical data

Operating pressure range

Rexroth A2FE/125 61W VZL 188 Motor Service Manual

Features

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 additional valve: counterbalance valve (BVD/BVE), flushing and boost-pressure valve
Bent-axis design

Type code

1) Sizes 45, 56, 63, 80, 90 see data sheet 91071 (A2FE series 70)

1) Please contact us.
2) Specify ordering code of counterbalance valve according to data sheet 95522 (BVD) respectively data sheet 95526 (BVE) separately.
3) Specify ordering code of sensor according to data sheet 95133 (DSA) separately.

Dimensions

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)
Drain port	Size	M22 × 15; 14 mm deep
	Standard 2)	DIN 3852
	State on delivery 3)	With protective cover (observe installation instructions)
Drain port	Size	M22 × 15; 14 mm deep
	Standard 2)	DIN 3852
	State on delivery 3)	Plugged (observe installation instructions)

Technical data

Table of values

Displacement geometric, per revolution		Vg	cm³	250	355
Nominal pressure		pnom	bar	350	350
Maximum pressure		pmax	bar	400	400
Maximum speed 1)		nnom	rpm	2700	2240
Maximum speed 1)		nmax
Inlet flow 2)	at nnom	qV	l/min	675	795
Torque 3)	at pnom	M	Nm	1393	1978
Rotary stiffness		c	kNm/rad	73.1	96.1
Moment of inertia for rotary group		JTW	kg·m²	0.061	0.102
Case volume		V	l	2.5	3.5
Weight (approx.)		m	kg	82	110

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) Restriction of input flow with counterbalance valve
3) Torque without radial force, with radial force see table “Permissible radial and axial forces of the drive shafts”

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 (size 28 to 180), n ≤ 0.25 • nnom (size 250 to 355), 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

Operating pressure range

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		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.
Minimum pressure at inlet (pump operating mode)	pE 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	pSu	700 bar	The summation pressure is the sum of the pressures at both work ports (A and B).
with integrated pressure relief valve	RA 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	RA max	16000 bar/s
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