French Clients Will Collect Hollow Rotary Actuator Tables

Hollow rotary actuator tables are mechanical devices used to rotate an object around a hollow center. They are often used in automation, robotics, and machining applications to precisely position and rotate workpieces. These tables are designed to provide smooth and accurate rotary motion while allowing for the passage of cables, pneumatics, or other utilities through the hollow center.

What is a Hollow Rotary Actuator Table?

A hollow rotary actuator table integrates a large-diameter, through-bore rotary drive unit with a precision output flange or platen, delivering direct-drive or gear-driven rotational positioning around a central open aperture. The hollow center routes electrical cables, pneumatic lines, hydraulic circuits, optical paths, or drive shafts without external rotary unions or cable carriers. Drive mechanisms include torque motors, worm gear sets, roller cam drives, or harmonic drives. Crossed roller or angular contact bearings carry combined axial, radial, and moment loads directly on the output ring. Angular positioning accuracy reaches ±1 arc-second on premium units. These tables serve as core motion platforms in rotary transfer machines, multi-axis machining centers, semiconductor handling, and metrology equipment.

The design of hollow rotary actuators typically involves a motorized rotation mechanism coupled with precision bearings to achieve the desired levels of accuracy and repeatability. They can also feature various control options, such as manual, pneumatic, or motorized operation, depending on the specific application requirements.

Depending on the manufacturer and model, hollow rotary actuators may come in different sizes, load capacities, and speed capabilities to suit a wide range of industrial and manufacturing needs. Some models also offer features like integrated encoders for position feedback and compatibility with various mounting and integration configurations.

When considering Hollow Rotary Actuators for a specific application, it’s essential to assess factors such as load capacity, rotational speed, positional accuracy, control interfaces, and environmental conditions to ensure proper selection and integration into the overall system.

FAQs about Hollow Platforms

1. Why is the hollow center bore important?
   The through-bore eliminates rotary unions and cable carrier chains. Pneumatic supply lines, vacuum circuits, encoder cables, fieldbus wiring, and optical fiber pass cleanly through the rotation axis. This simplifies machine architecture, reduces maintenance points, and prevents cable fatigue failures from continuous rotation.
2. How do you specify bore diameter for an application?
   List all items passing through the bore — cable harness diameter, pneumatic manifold dimensions, drive shaft size, or optical component envelope. Add a minimum 20% clearance margin to the largest item. Hollow rotary tables offer standard bore diameters from 50 mm to over 500 mm.
3. How does a direct-drive torque motor hollow table differ from a geared unit?
   A torque motor unit has no mechanical transmission — the motor rotor mounts directly on the output ring. This eliminates backlash, gear wear, and lubrication. It delivers high bandwidth and smooth continuous rotation. Geared units produce higher torque in smaller envelopes at lower cost but introduce backlash and wear.
4. How do you select between a roller cam drive and a direct-drive torque motor table?
   Choose a roller cam drive for fixed-station intermittent indexing at high torque and rigid dwell without a brake. Choose a direct-drive torque motor for programmable continuous positioning, variable station count, and high angular velocity. Roller cam units outperform servo tables at high-cycle fixed-index applications.

You are welcome to  https://www.youtube.com/@tallmanrobotics to watch our video centre for more projects or visit our website to check other series or load down e-catalogues for further technical data.