J.d. Engineering Co

Rotary tables are used for precision metalworking. They are usually made with a solid base that can be attached to another fixture. The table is a disk that rotates freely or with the help of a worm gear (crank). A rotary table is a disk-shaped metallurgical device used in the past to gain workpiece positioning. It allows a metalworker to cut or drill a workpiece at precise intervals around a fixed vertical or horizontal axis.

A turntable can be controlled manually or numerically by a computer. Certain types of rotary tables are designed for use with index plates or special operations index plates. A rotary table used in conjunction with one of these mounting plates is typically referred to as a dividing or dividing head.

The turntable device usually has a solid base that can be attached to a separate fixture or table with clamps. This device is basically a rotating disk that holds the workpiece in place while cutting or drilling. The disc portion of a rotary table can be freely rotated for indexing operations or rotated by an attached control arm known as a worm wheel. Stages used in high precision operations are typically rotated with a duplex worm gear to take up backlash. Rotary tables used in automated metalworking processes are rotated by computer controlled machines. Rotary tables are most commonly placed in a flat position with the's table axis vertically aligned. They are sometimes assembled with the spindle horizontally aligned so that a tailstock can be used to support the free end of the workpiece.

When this device is attached to a sub-table, the workpiece can be centered on the axis of the rotary table, which is then centered on the axis of the cutting tool. In this configuration, the rotary table, sub-table, and cutting tool axes are coaxial to facilitate concentric cutting operations. This configuration also allows the sub-table to be offset to drill equally spaced holes in a workpiece.

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