A through-bore slip ring, also called a through-hole or hollow-shaft slip ring, transfers power, signals and data across a rotating interface while leaving a clear center opening for a shaft, cable bundle or other service. Use this architecture when the machine needs routing space through the center, a larger circuit mix, or a mechanically integrated rotary assembly.
Terminology: through-bore slip ring = through-hole slip ring = hollow-shaft slip ring. Confirm the selected bore, circuit schedule and operating environment against the approved drawing and quotation.
Specifications to verify
The table below is a configuration checklist, not a blanket performance claim. Confirm the selected values against the approved drawing, test method and quotation for the exact assembly.
Configuration values are confirmed against the approved drawing, test method and quotation for the selected assembly.
Available configurations and selection guide
Available through-bore configurations can vary by clear bore, circuit count, contact system, lead exits, connectors, seals, mounting pattern and hybrid-service integration. Availability is confirmed per configuration, drawing and quotation.
Choose through-bore when a shaft, cable bundle, pneumatic line, hydraulic line or fiber path must pass through the center. Confirm the bore and envelope first, then define circuit function, peak load, speed, environment and target life.
Compare through-bore, capsule and hybrid architectures against the machine envelope, circuit schedule and service requirements.
Approved product photograph
Add the original Slip Ring USA asset for this configuration before publication.
Approved dimensional drawing
Attach the approved drawing revision or link to a Slip Ring USA datasheet; do not substitute an unverified range image.
Applications and case-study evidence
Through-bore assemblies are commonly evaluated for robotics, packaging machinery, industrial automation, rotating indexers, cable reels and integrated rotary systems. Add a customer-approved case study or measured test method when available.
Datasheet status: request a Slip Ring USA-branded PDF with the RFQ so the document matches the exact configuration and drawing revision.
Engineering questions
What is a through-bore slip ring?
It is a rotary electrical interface with a hollow center that allows a shaft, cable bundle or other service to pass through while power, signals or data cross the rotating interface.
When should I choose through-bore instead of capsule?
Choose through-bore when the machine needs center routing, a larger envelope, or more complex mixed-service integration. Choose capsule when the assembly is compact and no center opening is required.
Can a through-bore slip ring carry power and data together?
Yes, when the circuit mix, shielding, impedance, contact system and test method are engineered for the required protocols and data rates.
What details determine service life?
Speed, direction changes, duty cycle, current, contact material, vibration, contamination, temperature and sealing all affect life. The target should be tied to a stated test condition and expected revolutions or years.
Can the center pass pneumatic, hydraulic or fiber services?
The bore can provide routing space, but a combined assembly must be checked for bend radius, sealing, pressure, flow, fiber alignment, mounting and rotational constraints. Use the family-specific RFQ fields to define those requirements.
Content owner: Slip Ring USA technical content team. Technical reviewer: assign a named engineer and qualifications before publication. Publication date: August 6, 2026. Last technical review: August 6, 2026. Review and update all configuration-specific claims against the approved drawing and test record.
