Rexroth A2FM/1261W-VAB040 Motor

Rexroth A2FM/1261W-VAB040 motor is designed for conveyor systems. It has high efficiency, low noise and vibration. The bearings are surface mounted to reduce the speed variation due to changing temperature of oil.

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Features

Type code

Dimensions

Technical data

Rexroth A2FM/1261W-VAB040 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

1) Sizes 45, 56, 63, 80, 90 see data sheet 91071 (A2FM series 70)
2) Tapered shaft with threaded pin and woodruff key (DIN 6888). The torque must be transmitted via the tapered press fit.

1) Threaded ports at the sides plugged with threaded plugs.
2) Please contact us.
3) Specify ordering code of counterbalance valve according to data sheet 95522 (BVD) respectively data sheet 95526 (BVE) separately.
4) Size 710 please contact us.
5) Specify ordering code of sensor according to data sheet 95133 (DSA) respectively data sheet 95135 (HDD) separately.

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	22.9	28.1	32	45.6	56.1	63	80.4	90	106.7	125	160.4	180	200	250	355	500	710	1000
Nominal pressure		pnom	bar	315	400	400	400	400	400	400	400	400	400	400	400	400	400	400	400	400	350	350	350	350	350
Maximum pressure		pmax	bar	350	450	450	450	450	450	450	450	450	450	450	450	450	450	450	450	450	400	400	400	400	400
Maximum speed 1)		nnom	rpm	10000	8000	8000	8000	6300	6300	6300	5600	5000	5000	4500	4500	4000	4000	3600	3600	2750	2700	2240	2000	1600	1800
Maximum speed 1)		nmax 2)	rpm	11000	8800	8800	8800	6900	6900	6900	6200	5500	5500	5000	5000	4400	4400	4000	4000	3000
Inlet flow 3)	at nnom	qV	l/min	49	82	96	128	144	177	202	255	281	315	362	405	427	500	577	648	550	675	795	1000	1136	1600
Torque 4)	at pnom	M	Nm	24.7	66	76	102	146	179	204	290	357	401	512	573	679	796	1021	1146	1273	1393	1978	2785	3955	5570
Rotary stiffness		c	kNm/rad	0.63	0.92	1.25	1.59	2.56	2.93	3.12	4.18	5.61	6.25	8.73	9.14	11.2	11.9	17.4	18.2	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	0.0012	0.0012	0.0012	0.0024	0.0042	0.0042	0.0072	0.0072	0.0116	0.0116	0.022	0.022	0.0353	0.061	0.102	0.178	0.55	0.55
Case volume		V	l		0.17	0.17	0.17	0.2	0.2	0.2	0.33	0.45	0.45	0.55	0.55	0.8	0.8	1.1	1.1	2.7	2.5	3.5	4.2	8	8
Weight (approx.)		m	kg	2.5	5.4	5.4	5.4	9.5	9.5	9.5	13.5	18	18	23	23	32	32	45	45	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