Slip Rings
Highly Stable
with Less Contact
Resistance
RBE-4E
RBE-12A
Generally, in measurements of a rotating object such as
a shaft, strain gages and transducers cannot be connected
directly to amplifiers. Slip rings of the RBE-A and RBE-E
series enable signal transmission from these sensors to
stationary amplifiers through the brush and slip rings. The
slip rings are designed to connect to the shaft end of a rotating
object by flange (A type) or coupling (E type). The maximum
applicable rotating speed is 25000 rpm (E type, 4-element).
For mating measuring instruments, carrier-type dynamic
strain amplifiers of the DPM series are recommended.
Specifications
Environmental Capability
–10 to 50°C
Safe Temp. Range
Electrical Characteristics
10mΩ or less (A)
Contact Resistance
30mΩ or less (E)
100MΩ or less (A)
Insulation Resistance
500MΩ or less (E)
Chloroprene-coated 4-conductor
Cable
(0.3mm2) shielded cable, 10m long,
7.6mm OD, terminated with
NDIS connector at both ends (A).
(E type comes with no cable attached.)
Mechanical Properties
Refer to the table below.
Number of Rings
Operating Speed Range 0 to 6000 rpm (A)
3000 to 25000 rpm (4E)
3000 to 15000 rpm (8, 12E)
Refer to the table below.
Max. Rotating Speed
Approx. 110 hours (A)
Service Life of Brush
Approx. 50 hours (E)
(with maximum speed)
Refer to the table below.
Weight
FEATURES
Applicable for rotating speeds up to 25000 rpm (4E).
Strong against eccentricity, impact and vibration.
Note: Worn brushes can be replaced for value. Contact your KYOWA
service representative.
Dimensions
Brush DOWN
M8
31
35 27
8
14
B
A
16
B
Max.
Speed
(rpm)
47.5
C
15
D
RBE-A
Number
of Rings
100
A
E
Model
142
6
2–M4
4
15
91
6
60
10
3
M8
15
φ 20
φ 16
φ8
D
φ 52
φ 47
E
φ 80
φ 60
φ 40 h7
(50)
φ 70
φ 100
60
70.5
4–M8
Brush UP
4–M5, depth 10
φ 70
C
4–M8
φ 85
Input/output connector
φ8
RBE-E
A
B
C
D
E
Weight,
App.
Model
Number
of Rings
Max.
Speed
(rpm)
A
B
C
D
E
Weight,
App.
RBE-4A
4
148
90
35
—
—
1.5kg
RBE-4E
4
25000
33
—
—
73.5
92
1.0kg
RBE-6A
6
168 110
38
36
—
2.0kg
RBE-8E
8
15000
33
67
—
107.5
99
1.3kg
RBE-8A
8
188 130
40
40
—
2.2kg
RBE-12E
12
15000
33
67
101 141.5
99
1.5kg
RBE-10A
10
208 150
38
38
38
2.5kg
RBE-12A
12
228 170
40
40
40
3.0kg
6000
17
Torque-related Calculation
Graphs & Terminology
Terminology
Rated Capacity
Upper limit in the measuring range of the transducer.
Power/Rotating Speed/Torque Calculation Graphs
0
00
10
100000
00
50
Ex. A 1592N.m with 500kW and 3000 rpm
Ex. B 20.9kW with 200N.m and 1000 rpm
00
10
10000
0
50
Power (kW)
5000
0
10
1000
50
A
Speed (rpm)
50000
10
100
5
50
B
Safe Overload Rating
Maximum overload unlikely to cause permanent
change to stated specifications; expressed in percentage of the rated capacity.
Rated Output
Value obtained by subtracting the output under no load
from the output under the rated capacity. Usually, it is
expressed in mV/V, mA or equivalent strain.
Nonlinearity
Maximum deviation between the output calibration
curve in the increasing load cycle and the straight line
drawn from the output under no load to the rated output under the rated capacity; expressed in percentage of the rated output.
Hysteresis
Difference of output between the calibration curve
traced in the increasing load cycle and that in the
decreasing load cycle. Usually, the calibration curve
is reciprocated between the null load and the rated
capacity, and a maximum difference between outputs
corresponding to the same load is defined as the
hysteresis; expressed in percentage of the rated
capacity.
Recommended Excitation Voltage
Maximum excitation voltage which lets the transducer
perform continuously to the specifications.
5
Compensated Temperature Range
Temperature range in which the transducer performs
without exceeding the specified temperature effects
on output and zero balance.
1
10
Safe Temperature Range
Temperature range in which the transducer may not
satisfy the specifications but does not receive any permanent change in the specifications.
10
50
500
100
B
1000
A
5000 10000
50000 100000
Torque (N.m)
Relational expression of torque, power and rotating speed
W = 2πTN
where, T: Torque (N.m)
60
W: Power
Moment of Inertia
Energy level an object tries to remain at rest if at rest,
or to keep moving in the same direction if moving. In
rotating movement, it expresses the degree of difficulty to rotate due to its weight and shape.
N: Rotating speed (rpm)
0
00
20
00
0
15
0
00
10
20k
10k
00
70
00
0
5
00
40
00
30
7k
5k
3k
00
20 0
0
15
2k
Power (kW)
700
0
50
500
400
0
30
300
0
20
0
5
1
0
10
200
100
80
70
50
50
30
30
20
20
10
10
5
0.1
0.2
0.3
0.5
0.7
1
2
Torque (N.m)
3
4 5 6
8 10
Speed (rpm)
00
10
0
80
1k
18
Torque/Torsion in SI Unit and
Conventional Unit
SI Unit
100mN.m
200mN.m
300mN.m
500mN.m
1N.m
2N.m
3N.m
5N.m
10N.m
20N.m
30N.m
50N.m
100N.m
200N.m
300N.m
500N.m
1kN.m
2kN.m
3kN.m
5kN.m
10kN.m
20kN.m
30kN.m
50kN.m
100kN.m
Conventional Unit
1.020kgf.cm
2.039kgf.cm
3.059kgf.cm
5.099kgf.cm
10.20kgf.cm
20.39kgf.cm
30.59kgf.cm
50.99kgf.cm
1.020kgf.m
2.039kgf.m
3.059kgf.m
5.099kgf.m
10.20kgf.m
20.39kgf.m
30.59kgf.m
50.99kgf.m
102.0kgf.m
203.9kgf.m
305.9kgf.m
509.9kgf.m
1.020tf.m
2.039tf.m
3.059tf.m
5.099tf.m
10.20tf.m
Values for the conventional unit are calculated based on a
conversion factor of 1kgf.m = 9.80665N.m. Fifth-place
digits are rounded to the nearest whole number.