Multi-Axis Rotary Tables Enable Hundreds of Configurations

The Swiss-manufactured pL Lehmann 500 series of modular multi-axis rotary tables, now available from Exsys Tool, enables users to upgrade a vertical machining center to increase productivity. Adaptable to a variety of workpiece or production situations, the tables are available in four basic models that can be assembled into as many as 240 different configurations. More than 20 different clamping methods and behind-the-spindle accessories that include rotary unions, special clamping cylinders and angular position measuring systems further extend the system’s adaptability.

Both single-spindle and multi-spindle tables are available in four-axis and fourth- + fifth-axis versions. Swiveling-bridge-style four-axis tables employ Lehmann’s roto-Fix clamping yoke for machining of multiple parts. The tables’ backlash-free preloaded gear drives (PGD) provide both high torque and high rotation speeds, with spindles capable of 47 to 111 rpm and cycle times for 90 degrees of 0.34 sec. Five-axis tables operate in simultaneous machining or productivity-enhancing 3+2 positioning modes.

According to Exsys, these compact tables consume a minimum of space in the machine work envelope, facilitating optimal tool access to the workpiece. Despite their space-efficient dimensions, the tables and spindles offer strong resistance to pull-out torque and axial force while providing high levels of clamping torque, the company says. Engineered for low power consumption and light weight, the tables feature IP67-rated enclosures.