Product Overview
An indexing ring, also known as a rotary indexing table or cam indexer, is a precision positioning device used in machine tools to rotate a workpiece to exact angular positions. These devices are essential for automated manufacturing where multiple operations must be performed at different angles without manual repositioning. Indexing rings are integrated into drilling machines, milling centers, and assembly stations for repeatable angular positioning.
Types and Features
Cam-driven indexers use a precision cam and roller gear mechanism for highly accurate zero-backlash positioning, preferred for high-speed production. Servo-driven rotary tables use a programmable servo motor with encoder for flexible positioning at any angle, ideal for CNC applications with variable patterns. Manual indexing plates feature precision-drilled hole patterns and a locating pin for operator-controlled positioning in manual milling and inspection setups.
How to Choose
Consider the required number of positions, positional accuracy, load capacity, and cycle speed. For high-volume production with fixed patterns, a cam-driven indexer delivers fastest cycle times. Applications requiring flexible positioning angles are better served by servo-driven tables. Evaluate total load including workpiece, fixture, and clamping devices to ensure the unit handles combined weight and moment forces.
Replacement and Installation
Remove the workpiece fixture and disconnect drive connections. Unbolt the indexer from the machine base and clean the mounting surface thoroughly. Align the new unit using precision dowel pins and level the surface to eliminate angular misalignment. Reconnect the drive mechanism and run test indexing cycles to confirm accuracy before resuming production.
Maintenance Tips
Lubricate the internal cam and roller mechanism according to the manufacturer's schedule using specified oil or grease. Check for abnormal noise or vibration indicating wear in cam followers or bearings. Inspect the output flange and mounting bolts periodically for looseness. Keep external surfaces clean and free from metal chips to prevent contamination through seal degradation.
