The small through hole slip ring for precise instrument is designed for both high-precision required and space-limited applications, like pipeline monitoring, ultrasonic probes, medical devices, precision instruments, etc. It has 6 to 30 circuits to choose from, each circuit can carry 2A current or transmit signals. Although it is a miniature slip ring with an inner diameter of only 9mm, it is still enough to mix and transmit different types of current, data, and control signals.

Features

Efficient heat dissipation

The small through hole slip ring for precise instrument features an aluminum alloy housing and copper alloy conductive rings, enabling quick heat dissipation from electrical currents. Therefore, it can adapt to working conditions up to 100+°C.

Stable operation

It has a wide input voltage range and can cope with power transmission line losses, unstable generator output, etc. in the case of voltage fluctuations.

Sealed structure

The slip ring has a sealed ball bearing structure design to prevent external pollutants such as dust, impurities, and moisture from entering the bearing. This also helps it maintain good lubrication.

Anti-Corrosion

Its brush part is made of chemically inert precious metals such as gold, silver, and palladium, which are resistant to corrosion from oxygen, moisture, acids, and alkalis.

Slip Ring Design Drawings

Optional

Circuits
Loading of each circuit
Wire length
Inner hole /outer hole diameter or length
Working speed
Gold contacting
Housing color

Parameters

Mechanical

Working speed	300rpm
Operating temperature	-40℃~ +100℃
Contact material	Precious metal
IP Grade	IP 54, IP65 or higher

Electrical

Circuit	8 & 12 & 18 & 20 & 30or more
Current	2A or higher
Voltage	≤ 380V
Dielectric strength	≤ 500V@50Hz between each circuit
Insulation resistance	500MΩ 500VDC
Electric noise	≤ 7mΩ
Lead wire size	26AWG, UL, color Teflon, silver or tin plated
Lead wire length	200mm

Dimension

TYPE	Rings	Length	ID	OD
BHT0932-8	8	28.4mm	Φ9mm	Φ32mm
BHT0932-12	12	35.6mm	Φ9mm	Φ32mm
BHT0932-18	18	46.4mm	Φ9mm	Φ32mm
BHT0932-20	20	50mm	Φ9mm	Φ32mm

Quality Test and Certification

FAQ

Q: How can I use this through-hole slip ring?

A: Although small in size, small through hole slip ring for precise instrument has a wide range of applications, including electric fans, centrifuges and rotors in rotating machinery, as well as antennas or sensor rotation in aerospace. At the same time, it can also test the alternator or starter of the car, the robot or mechanical arm in the industry.

Q: How to test the through-hole slip ring before packaging?

A: It includes visual inspection, electrical continuity, contact resistance, durability testing, signal transmission, and rotation smoothness evaluation. Our products undergo random inspections during production, and the test report will be included with the product.

Q: What conditions can lead to slip ring failure?

A: As time passes, the mechanical parts of the slip ring will wear, resulting in increased friction, dislocation, and even fracture. The electrical contact problem may also make it degenerate due to repeated connection and disconnection, resulting in increased resistance, arc, or even complete failure. In addition, if the slip ring is exposed to extreme temperatures, humidity, or pollutants, its durability will also be reduced.

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