12.7mm ID Through Bore Slip Ring – 12 Circuits 5A/10A, 380VAC, 300rpm, IP51, Hollow Shaft Rotary Connector
Overview
The DHK012-12 through bore slip ring features a true Ø12.7 mm (0.5″) central bore for shaft-, pneumatic-, hydraulic- or cable-pass-through integration. With precious-metal fiber-brush contacts and modular ring stack, it delivers low-noise power + signal transmission for space-limited rotary systems that cannot use a solid-shaft slip ring.
Key Specifications
| Parameter | Value |
|---|---|
| Inner Diameter (Bore) | 12.7 mm (0.5″) |
| Circuits | 6 / 12 / 18 / 24 (default 12) |
| Current per Ring | 2A (signal) / 5A / 10A (optional) |
| Rated Voltage | 0–380 VAC/VDC (440V / 600V optional) |
| Max Speed | 300 rpm (up to 600 rpm custom) |
| Contact Material | Gold-gold / gold alloy, multi-point fiber brush |
| Dynamic Resistance | < 0.01 Ω |
| Electrical Noise | ≤ 5 mΩ |
| Insulation Resistance | ≥ 500 MΩ @ 500 VDC |
| Dielectric Strength | 1000 VAC @ 50 Hz, 60 s |
| Housing Material | Anodized aluminum alloy |
| Lead Wire | Teflon AWG16 / AWG22 / AWG26, 300 mm default |
| Protection Grade | IP51 (IP54 / IP65 optional) |
| Working Temperature | -40 °C ~ +80 °C |
| Mounting Type | Shaft clamp or flange, anti-rotation tab on stator |
| Life Expectancy | 20+ million revolutions, maintenance-free |
Design Features
- True hollow center, bore tolerance ±0.05 mm, fits standard 1/2″ shaft
- Mixed power + signal (RS485, encoder, CAN, Ethernet optional)
- Low-torque bearing, smooth for servo-driven joints
- Maintenance-free, 20+ million rev service life
- Rotor/stator lead exit customizable (axial or radial)
Typical Applications
- Robotic arm wrists and joint modules
- Small rotary indexing tables, turntables
- Medical imaging gantry, surgical light heads
- Packaging, labeling, capping machines
- CCTV pan-tilt units, antenna pedestals, display turntables
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