Indexing Heads

 

Indexing Heads

Category: Machine Shop

Summary: Dividing workpieces into precise increments.

Indexing heads are precision workholding devices used primarily on milling machines and other machine tools to accurately divide a workpiece into precise angular segments. This allows for machining operations to be performed at specific, evenly spaced intervals around the workpiece.

   Here's a more detailed explanation:

* **Function:** Indexing heads hold the workpiece and rotate it in controlled increments. This is achieved using a mechanism with an index plate and a crank, allowing for divisions of a circle into various numbers of equal parts.

* **Applications:** Indexing heads are essential for:

    * Cutting gears with evenly spaced teeth.

    * Milling flutes on cutting tools.

    * Creating splines on shafts.

    * Drilling bolt hole circles.

* **Types:** Indexing heads can be:

    * **Direct indexing:** Where the workpiece is locked directly to a plate with a limited number of divisions.

    * **Indirect indexing:** Using a crank and index plate to achieve a wider range of divisions.

    * **Universal indexing heads:** Offering both direct and indirect indexing, as well as the ability to hold the workpiece at an angle.

   In essence, indexing heads are crucial for machining parts that require precise angular positioning and division, enabling the creation of complex and accurate components.