Through-hole slip ring DHK025

for roboticsbrassplastic

Short description
DHK025-1-750A high current slip ring (25 mm through-hole, 1 circuit).

Product overview
This through-hole high-power slip ring is a dedicated rotary power transmission component for automated welding equipment. The standard inner bore is 25 mm. The single channel supports ultra-high current load and is used to continuously transmit main welding power during 360° unlimited rotation of welding robot arms to avoid cable twisting, winding and fracture caused by frequent reciprocating rotation of robot joints.

Core advantages

• High current capacity: Single channel rated 750 A, compatible with AC and DC welding power supplies to meet heavy industrial welding robot demands and stabilize welding output.
• Precious metal low-resistance contacts: Precious metal contact pairs provide anti-spark, anti-oxidation and anti-ablation performance; dynamic contact resistance variation is controlled below 10 mΩ for a stable welding arc.
• H62 brass rotor: Rotor made from H62 brass offers high electrical and thermal conductivity for excellent heat dissipation during continuous 750 A operation.
• Insulated engineering plastic stator: High-strength insulating stator suitable for welding workshop environments and reduces rotor/stator wear.
• Environmental adaptability & IP51 protection: Protected against dust and vertical water splash (IP51). Operating temperature range -30 °C to +80 °C and working speed up to 50 rpm.
• 25 mm through-hole & customization: 25 mm central bore for robot internal routing. Supports customized lead lengths, wire outlet directions, mounting structures and higher protection levels to fit robot installation space.

Main application scenarios

• Multi-axis automatic welding robot arm rotary main power transmission
• Rotary welding positioner and rotary welding fixture power conduction
• Heavy-duty welding manipulator rotary joint power supply
• Automated welding production line rotating welding workstation components

Factory quality & testing
Each slip ring is fully tested before delivery including high-current load test, resistance fluctuation test, AC/DC withstand voltage test and continuous rotation endurance test. Customization and test report support are available.

Technical specifications

• Model series: DHK025 series
• Inner bore: 25 mm through-hole
• Number of circuits: 1 channel
• Rated current: 750 A (single channel)
• Voltage compatibility: 0 ~ 380 V AC/DC
• Rotor material: H62 brass (high electrical and thermal conductivity)
• Stator material: Insulated engineering plastic
• Contact type: Precious metal contact pairs (low dynamic resistance variation < 10 mΩ)
• Protection level: IP51 (dust & vertical drip-proof)
• Maximum rotating speed: up to 50 rpm
• Operating temperature range: -30 °C to +80 °C
• Customization: Lead length, mounting structure, wire outlet direction and higher protection levels available
• Typical applications: Welding robot arms, rotary welding fixtures, welding positioners, heavy-duty welding manipulators, automated welding workstations