Hollow Rotary Platforms

An Arc-Second Actuation Unit Integrating Precision Transmission and High-Rigidity Slewing Bearings

Integrated Transmission & Support: The reduction mechanism and cross-roller bearing are deeply integrated, allowing payloads to be bolted directly onto the output table, eliminating independent bearing housings and couplings.

Versatile Drive Multi-Pulses: Available in Worm Gear, Spiral Bevel Gear, and Hypoid Gear configurations to precisely match distinct operating conditions such as self-locking, heavy load, and low noise.

Arc-Second Precision Indexing: Repetitive positioning accuracy within ≤±10 arcsec with a full-series design lifespan of 20,000 hours.

The Precision Hollow Rotary Platform is a highly integrated actuator engineered for multi-station automated indexing tables. Its core design philosophy lies in the monolithic integration of a precision gear reduction mechanism and a high-rigidity cross-roller bearing.

By locking the payload directly onto the output rotating table, the system simultaneously obtains stable rotatable support across axial, radial, and overturning moments. This eliminates the need for bespoke auxiliary bearing blocks and transmission couplings, fundamentally streamlining the assembly chain and multiplying system rigidity.

Compared to Direct Drive (DD) motor solutions, the Hollow Rotary Platform offers superior anti-overload torque absorption and higher cost-efficiency during high-frequency start-stop cycles. Compared to traditional mechanical cam indexers, it supports fully programmable arbitrary angle indexing for enhanced cycle time flexibility. The full-series large-diameter hollow through-hole design allows pneumatic lines, electrical cables, and laser paths to pass directly through the rotary center, completely rooting out cable tangling and fatigue failures.

1. Precision Transmission: Three Geometries for Exact Application Matching

Worm Gear Drive (Horizontal Series): Sliding contact configuration yields inherent mechanical self-locking, eliminating disk back-driving risks during power loss—perfect for vertical configurations and cost-conscious standard indexing.

Spiral Bevel Gear Drive (Right-Angle Series): Ground spiral tooth flank facilitates highly efficient 90° torque redirection, maintaining exceptional precision retention under heavy-duty shock loads.

Hypoid Gear Drive (Hypoid Series): The offset axis design increases the number of teeth in simultaneous engagement, reducing single-tooth stress. This allows high torque output within tightly constrained low-backlash boundaries while significantly dampening high-frequency harmonics.

2. High-Rigidity Slewing Support: Single Bearing Handling Multi-Directional Loading

The output table directly integrates a precision cross-roller bearing, where rollers are arranged in a 90° crossed configuration. This singular bearing architecture independently handles combined axial, radial, and overturning moments. Even under heavy eccentric loading, the output disk’s axial and radial runout remains rigidly stabilized within ≤0.01 mm, completely wiping out end-face wobbling and cantilever deflection induced by bearing clearance, safeguarding long-term operational consistency.

3. All-Open Motor Interface: Plug-and-Play, Zero Coupling

Featuring a modular, swappable motor adapter flange and input shaft assembly, it delivers native compatibility with mainstream AC servo and stepper motors from brands like Yaskawa, Mitsubishi, and Panasonic. Engineers can execute rapid power matching without modifying the machine chassis structure, drastically compressing the lead time from initial drafting to shop-floor commissioning.

Automated Welding Positioners: The large hollow bore accommodates torch leads and shielding gas lines straight through the center, empowering 360° unrestricted continuous rotation, paired with worm-gear self-locking for failsafe orientation during emergency stops.

Semiconductor Wafer Handling: Arc-second repeatability fulfills stringent wafer alignment tolerances, while the hollow passage seamlessly houses vacuum suction lines. The low-particulate emission of the Hypoid Series inherently suits cleanroom environments.

Laser Cutting & Marking Indexing Tables: A direct drop-in replacement for DD motors, preserving precise positioning indexing while cutting total system cost and removing thermal management complexities.

3C Precision Assembly Lines: Low-noise, maintenance-free operation aligns with industrial automation upgrade demands, supporting flexible programming for arbitrary multi-station indexing.

Full Technical Parameter Matrix: This overview serves as a general product guide. For detailed dimensional blueprints, exact pass-through bore diameters, permissible axial/radial forces, and precise gear ratios (e.g., 1:5, 1:10, 1:18) for specific models, please download the Full Hollow Rotary Platform Technical Manual.

Bespoke Engineering Verification: Inertia matching and duty cycle acceleration calculations are critical to successful indexing. Share your payload mass, turn-table diameter, and target cycle time with us. HAEGOLIA application engineers will provide dynamic calculations and model recommendations free of charge.