Overview
A tilting rotary table combines rotational movement with angular tilt for multi-axis machining on conventional machine tools. These tables transform three-axis milling machines into four or five-axis platforms, enabling machining of compound angles and complex surfaces. They are widely used in aerospace, medical device manufacturing, and precision engineering.
Types and Features
Trunnion-type tables mount the rotary table between bearing supports pivoting on a horizontal axis. Cradle-type designs tilt the entire assembly on a curved saddle with ranges up to ninety degrees. Worm gear mechanisms provide self-locking positioning. Direct-drive versions use torque motors for high-speed, backlash-free five-axis machining. CNC versions integrate servo drives on both axes.
How to Choose
Determine required tilt range and calculate combined workpiece and fixture weight for load capacity. Consider the machine working envelope as the table adds height. For CNC applications, verify control supports additional rotary axes. Ensure table diameter and center bore accommodate workpiece size while maintaining rigidity at maximum tilt angle.
Replacement and Installation
Position the table using lifting equipment and secure with all mounting points. Torque bolts to specifications. Align the tilt axis parallel to machine axis using precision levels and dial indicators. Connect servo drives and configure parameters including steps per degree and tilt limits. Perform calibration on both axes and machine a test piece to verify accuracy.
Maintenance Tips
Lubricate rotary and tilt mechanisms per manufacturer schedule. Check both axis backlash periodically using dial indicators. Inspect tilt axis locking mechanism for positive engagement. Clean exposed surfaces and way covers to prevent chip accumulation. Verify encoder calibration after maintenance work.
