Rexroth A2FM/32.61WVBB020 Motor

This Rexroth A2FM/32.61WVBB020 Motor is designed to offer high output power and maximum efficiency while maintaining the most compact size. This motor is capable of focusing on compressed air and oil without compromising performance, decrease wear and tear, protects vital components from over heating while decreasing costs through lower energy consumption.

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Features

Type code

Dimensions

Technical data

Rexroth A2FM/32.61WVBB020 Motor service manual

Features

Large variety of available nominal sizes allows exact adjustment to the application
High power density
Very high total efficiency
High starting efficiency
Working ports SAE flange or thread
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

Dimensions

Working port	Size	M18 × 15; 12 mm deep
	Standard 1)	DIN 3852
	State on delivery	With protective cover (must be connected)
Drain port	Size	M10 × 1; 8 mm deep
	Standard 1)	DIN 3852
	State on delivery 2)	Plugged (observe installation instructions)
Drain port	Size	M10 × 1; 8 mm deep
	Standard 1)	DIN 3852
	State on delivery 2)	Plugged (observe installation instructions)

Technical data

Table of values

Displacement geometric, per revolution		Vg	cm³	4.93	10.3	12	16	200	250	355	500	710	1000
Nominal pressure		pnom	bar	315	400	400	400	400	350	350	350	350	350
Maximum pressure		pmax	bar	350	450	450	450	450	400	400	400	400	400
Maximum speed 1)		nnom	rpm	10000	8000	8000	8000	2750	2700	2240	2000	1600	1800
Maximum speed 1)		nmax 2)	rpm	11000	8800	8800	8800	3000
Inlet flow 3)	at nnom	qV	l/min	49	82	96	128	550	675	795	1000	1136	1600
Torque 4)	at pnom	M	Nm	24.7	66	76	102	1273	1393	1978	2785	3955	5570
Rotary stiffness		c	kNm/rad	0.63	0.92	1.25	1.59	57.3	73.1	96.1	144	270	324
Moment of inertia for rotary group		JTW	kg·m²	0.00006	0.0004	0.0004	0.0004	0.0353	0.061	0.102	0.178	0.55	0.55
Case volume		V	l		0.17	0.17	0.17	2.7	2.5	3.5	4.2	8	8
Weight (approx.)		m	kg	2.5	5.4	5.4	5.4	66	73	110	155	325	336

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) Intermittent maximum speed: overspeed for unload and overhauling processes, 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”

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 5 to 200), n ≤ 0.25 • nnom (size 250 to 1000), permissible temperature difference between axial piston unit and hydraulic fluid max. 25 K
Cold start	νmax ≤ 1600 mm²/s	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
	ν = 10 … 400 mm²/s3)	FKM	ϑ ≤ +103 °C	measured at port T
	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
Short-term operation	νmin = 7 … 10 mm²/s	FKM	ϑ ≤ +103 °C	t ≤ 3 min, p ≤ 0.3 • pnommeasured 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)

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