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Multi-wire brush contacts consist of fine wires in parallel bunches which provide high contact reliability. Moreover, brushes can reliably read electrical signals from fine patterned substrates, thereby achieving miniaturized circuitry. Scratch brush contacts can keep stable contact resistance, even after long use. |
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Sliding type provides high contact reliability. |
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Spring materials for low torque operation. |
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Use of spring materials gives stable contact pressure. |
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Can be made smaller than other contact systems. |
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Extra long life type. |
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Can be made small and light. |
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Excellent cost-performance. |
Brushes for potentiometers, trimmers, encoders, throttle sensors, digital switches, etc.
 Precious Metals for Brushes and Their Properties |
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Composition (%) |
Density |
Melting Point
(°C) |
Specific Resistance
(μΩ·cm) |
Young's Modulus
(MPa) |
Hardness
(Hv) |
Tensile Strength
(MPa) |
Au |
Pt |
Pd |
Ag |
Other |
SP-1 |
10 |
10 |
35 |
30 |
Cu,Zn |
11.9 |
1,098 |
31.6 |
120,000 |
265~310 |
1160~1410 |
SP-2 |
70 |
5 |
- |
10 |
Cu,Ni |
15.9 |
955 |
13.3 |
110,000 |
235~290 |
1030~1370 |
SP-3 |
- |
0~1 |
42~44 |
38~41 |
Cu |
10.3 |
1,077 |
28.25 |
120,000 |
270 |
1000 |
SP-5 |
20 |
5 |
45 |
30 |
- |
12.8 |
1,371 |
39.4 |
110,000 |
95 |
360~510 |
625 |
62.5 |
- |
- |
7.5 |
Cu |
13.7 |
861 |
14.0 |
- |
280~300 |
- |
625R |
62.5 |
- |
- |
29 |
Cu |
14.4 |
1,014 |
12.5 |
- |
260~290 |
- |
Ag-Pd
-Cu |
- |
- |
50 |
20 |
Cu |
10.0 |
1,150 |
27.2 |
- |
190~320 |
690~1270 |
Pd-Ru |
- |
- |
90 |
- |
Ru |
12.0 |
1,580 |
43.0 |
- |
180~280 |
590~980 |
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We manufacture rotor type, precision grade slip rings in response to the high degree of contact reliability and confidentiality demanded in the field of aircraft instrumentation.
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Each ring is connected to a lead wire of a different color . |
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Lead wires are formed of leads and epoxy resin using our own unique process. |
(unit:mm) |
Slip Ring Number |
A |
B |
C |
D |
E |
F |
G |
H |
Ring
Material |
Number of
Rings |
SRA-1 |
φ2.39 |
φ3.96 |
0.36 |
0.64 |
1.01 |
1.00 |
11.5 |
φ1.52 |
Gold |
10 |
SRA-2 |
φ3.20 |
φ3.80 |
0.79 |
0.74 |
1.17 |
1.10 |
15.34 |
φ3.45 |
Pt-Au alloy |
12 |
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Lead wires are AWG #32 equivalent Teflon-coated silver-plated annealed copper wires. Diameter is 0.5 (copper wire 0.2) and insulation resistance is greater than 2 × 1010 Ω at 500 V DC for 10 seconds.
* Other specifications are available on request. |
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