Mill Rotary Table

A rotary table is essentially a mechanical device which has a circular top surface with the rotation capability. The top surface is the table of the device and the name comes from the table that rotates. This type of machine is used for positioning work pieces that are clamped on the table. With the rotary table, the operator is able to perform machining works onto the workpiece, such as drilling or milling. A rotary table used for milling is called a mill rotary table or rotary table mill. What makes a rotary table distinctive is that it allows the operator to drill a group of holes in specific precision patterns.

Rotary Table for Milling Machine

A wide range of machining operations can be performed on a rotary table and milling is one of the most common types. In fact, the mill rotary tables are a fundamental component to many milling operations, especially for automatic processing in the modern machine tool industry due to its excellent capability to work with round or circular-shaped work pieces. When it comes to processing a round workpiece, a mill rotary table may be an apt choice over a traditional machining lathe. There is genuinely a lot of versatility to this mill attachment.

Generally speaking, a rotary table for milling is an attachment that allows the work piece to have a linear motion on a mill in two rotary directions. Milling operations in particular patterns and arrays at given angles are enabled with a mill rotary table. The patterns that can be done onto a workpiece include complete round, partial round, large round, small round, etc.

Anatomy of Mill Rotary Table

The table is essentially a round plate with holes, grooves and slots on the surface. They are used to clamp the workpiece with fixture accessories such as bolts or fasteners. The rotary table is mounted only on a shaft which connects to a gearbox at the bottom. There is a dial and turning wheel which controls the rotation of the rotary table. Sometimes there is an additional shaft that lies horizontally at the base of the gearbox so that the whole device can be tilted.
With the main shaft that connects to the dial and the gearbox, the rotary table is able to rotate in two opposite directions. With an additional shaft that lies horizontally at the base of the device, the rotary table is allowed with the tilting movement capability. When the rotary table is mounted onto the bed of a mill, it can move linearly along the longitudinal axis of the mill. With these movements, the mill is able to machine a workpiece at complex angles.

Rotary Table as Part

Mill rotary tables, as a piece of milling-based machine equipment, are commonly mounted onto the workbench of a mill with other pieces of equipment such as spindles, chucks, jigs, tailstocks, servo motors, etc. A typical mill or CNC lathe is usually equipped with the basic 3-axis movement capability. The mill rotary table in this case provides the mill with one or two additional machining axis to the machine. With a rotary table on a mill, the machine is able to carry out more sophisticated machining operations on the work pieces.

Rotary Table for Indexing

One of the primary applications of a rotary table is for indexing. Using a rotary table as an indexing table, a dividing plate is needed. Indexing refers to the repetitive movements around a platform for precision positioning. With the dividing plate on a rotary table, a workpiece can be circularly indexed. In other words, the workpiece can be precisely rotated to the preset angles or circular divisions. Indexing is important when certain arrays of holes are required to be drilled in particular divisions of a work piece. Again, the rotary table for indexing is usually mounted onto a milling machine to carry out the drilling operation.

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