Designed to convert small, three-axis vertical-spindle machining centres (VMCs) into versatile five-axis production centres, while enabling them to machine larger components than their size would normally allow, Kitagawa has launched two new compound rotary tables. The Japanese-manufactured RKT500 and RKT600 are available in the UK and Ireland exclusively through sales agent 1st Machine Tool Accessories.

Developed primarily for the many 30-taper VMCs that offer only linear CNC motion, the rotary tables add two rotary axes to deliver full five-axis capability. They can also be fitted to smaller 40-taper machines and, subject to cutting force limitations, selected 50-taper models.

The RKT500 accommodates workpieces up to 500 mm in diameter and 270 mm high, while the RKT600 increases capacity to 600 mm diameter and 320 mm high. Both models support a combined workpiece and fixture weight of up to 100 kg.

To simplify automated work holding, both tables feature a coolant port, while the RKT500 provides six hydraulic or pneumatic ports and the RKT600 offers 10.

Kitagawa’s patented multi-plate braking technology delivers 740 Nm of clamping torque on the tilting axis and 600 Nm on the rotating axis. Positioning accuracy is within 30 arc-seconds on both axes, with repeatability of ±2 arc-seconds.

The high levels of accuracy and rigidity are achieved using Kitagawa’s roller gear cam mechanism, which eliminates backlash while offering greater torque transmission efficiency, rigidity and indexing speed than conventional worm gear drives.

Once positioned, each axis is securely locked using Kitagawa’s multi-disc braking system. By stacking multiple friction discs, the design achieves high clamping torque without increasing the physical size of the rotary table, maximising performance while maintaining a compact footprint.

More information www.1mta.com