Product Overview
A rotary indexing table is a precision machine tool accessory enabling accurate angular positioning of workpieces during machining. It allows milling, drilling, and tapping at precise rotational intervals without manual repositioning. The table locks into predetermined positions using cam-driven or servo-driven mechanisms, ensuring repeatable accuracy within arc-seconds. These tables are essential in automotive, aerospace, and electronics manufacturing.
Types and Features
Cam-type indexing tables use precision cam and roller mechanisms providing zero-backlash positioning and excellent rigidity, ideal for high-speed production. Servo-driven tables employ direct-drive or gear-driven servo motors offering programmable angular positioning with unlimited divisions for complex multi-axis tasks. Pneumatic indexing tables use compressed air for clamping and rotation, suitable for lighter-duty applications. Available diameters range from 100mm to over 600mm with load capacities from kilograms to hundreds of kilograms.
How to Choose
Determine required angular accuracy and repeatability first, as cam-type tables offer superior precision. Consider workpiece weight and cutting forces to dictate table diameter, bearing capacity, and clamping torque. Evaluate the number of divisions needed, with cam tables offering fixed positions and servo tables providing unlimited programmable angles. Assess mounting orientation whether horizontal, vertical, or tilting, as this affects bearing load distribution. Ensure compatibility with your CNC controller and machine tool interface.
Replacement and Installation
Document the existing mounting configuration including bolt patterns, keyway positions, and electrical connections before removal. Clean the machine surface and inspect for damage that could affect seating. Install using dial indicators to verify concentricity and parallelism within specifications. Connect electrical and pneumatic lines per the wiring diagram, focusing on encoder feedback signals. Run a complete calibration cycle including homing and angular verification before resuming production.
Maintenance Tips
Check and replenish lubrication using manufacturer-recommended grease compatible with internal bearing materials. Inspect sealing rings periodically to prevent coolant and chip contamination. Monitor the clamping mechanism for wear by measuring holding force at regular intervals. Keep external surfaces clean from chips and debris that could interfere with rotation. Schedule annual inspections including bearing preload verification and gear backlash measurement.
