SRH Series

Through Bore Slip Ring (SRH Series)

Features a hollow center for routing hydraulic lines, pneumatic lines, or a drive shaft.

Features

Hollow center design
Allows routing of hydraulic lines
Pneumatic line compatibility
Drive shaft accommodation
Versatile internal routing

Applications

Industrial machine processing centers Rotary tables Heavy equipment towers Cable reels Packaging equipment Stacker cranes Magnetic clutches Process control equipment Rotary sensors Emergency lighting equipment Robots Exhibition/display equipment Medical equipment Revolving doors

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Through Bore — Model Selection

10 models

Model	ID (mm)	OD (mm)	Circuit Qty.	Max. Current
SRH1235	12	35	6, 12	5 A
SRH1254	12	54	6, 12, 18, 24	5 A
SRH2578	25	78	From 6 to 48	15A
SRH3899	38	99	From 6 to 48	15A
SRH50120	50	120	From 6 to 72	20A
SRH60135	60	135	From 6 to 96	20A
SRH70155	70	155	From 6 to 96	20A
SRH80180	80	180	From 6 to 96	20A
SRH90190	90	190	From 6 to 96	20A
SRH100203	100	203	From 6 to 96	20A

Features

center

Hollow

routing capability

Hydraulic linesPneumatic linesDrive shaft

design

Through-bore

Technical Specifications

15 points

Through bore size 3mm to 900mm
Circuit number 2-350
Operation speed:up to 250rpm, 800rpm, 1500rpm
Circuit current:2A, 5A, 10A, 15A, 20A, 50A, 100A, 200A, up to 400A.
Power circuit and Ethernet signal circuit can be integrated to one unit slip ring
ABS plastic housing and AL housing are optional
Flexible, color-coded, silver-plated, Teflon® insulated lead wires
Contact material silver to silver coating
Standard wire leads length is 500mm
Standard temperature is -20°C to +80°C
Insulation strength 500V AC@50HZ 60S
Insulation resistant 500MΩ 500VDC
Long life cycles up to 80 million cycles
Protection grade IP 51, IP54, IP65
Ethernet circuits can transmission 100Mbps, 1Giga data.

Electrical Data

7 specs

Specification	Values
Rated Voltage	240VAC/VDC
Rated Current	5A/ring
Lead Size	AWG22, silver plated, PTFE insulated
Lead Length	Standard 500mm
Insulation Resistance	≥500MΩ/500VDC
Dielectric Strength	500VAC/50Hz, 60s
Electrical Noise	≤10mΩ

Mechanical Data

7 specs

Specification	Values
Rated Speed	0 ~ 400 rpm
Working Temperature	−20°C ~ +80°C
Humidity	60%RH or higher
Contact Material	Precious metal
Housing Material	Engineering plastic
Torque	0.1N·M for 6-ring version; 0.03N·M increased for every 6 rings added
Protection Level	IP51

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About Electrical Rotary Joints (Slip Rings)

Powering Continuous Rotation. Essential electromechanical devices that enable continuous, unrestricted rotation while maintaining secure and stable electrical connections.

A slip ring is an electrical connector designed to conduct current or data across a rotating interface, replacing the need for dangling wires that would inevitably twist and break.

Key components

Rings: Circular, conductive tracks (usually made of copper or a precious metal alloy) mounted on the rotor (the rotating part)
Brushes: Stationary, conductive contacts (often graphite, carbon fiber, or a precious metal alloy) that rest on the rings and transfer the electrical current or signal
Housing/Stator: The fixed enclosure that holds the brushes and provides the mounting points for the stationary side

Typical applications

Packaging Machinery: Transmitting power and control signals to rotating sealing heads or label applicators
Cranes & Winches: Providing power and control signals to the rotating drum or trolley
Robotics & Automation: Enabling unlimited joint movement in multi-axis robots without damaging wiring
Turrets & Indexing Tables: Supplying power and control for precision positioning systems
Wind Turbines: Transmitting pitch-control signals and monitoring data from the rotating hub to the nacelle
Medical Equipment (e.g., CT Scanners): Handling high-speed data transfer and power delivery during continuous rotation