What Is an Index Plunger?
An index plunger is a machine element component that allows fast and easy workpiece fixation and positioning by operating a knob. This part can also be easily released and detached by operating the knob. Since the pin is inserted into a hole or groove for fixing and positioning, once released and moved to a position where there is no hole or groove, it can be fixed and positioned in the hole or groove again.
This component is used for angle indexing and positioning of slide mechanisms. Because of its versatility, the index plunger is an indispensable component of devices and equipment.
Uses of Index Plungers
Index plungers are used for positioning, indexing, and as a slide adjustment for attaching and detaching parts. They are used in a variety of industrial machinery, including machine tools, packaging machinery, and food processing machinery.
In the case of a moving stage, the plunger is secured by fitting its pin into the groove between the rotary stage and the linear stage. In the case of a linear stage, the pin is installed in the moving table. An indexing plate with a groove carved into it is attached to the fixed plate, and the pin is inserted into and out of the groove for positioning. For a rotary stage, the pins are installed on the fixed side. As with the linear stage, positioning is achieved by inserting and removing the pin into and out of the groove of the indexing plate.
Principle of Index Plungers
In addition to the type that pulls a knob, there are ring type, T-shaped knob type, knobless type, special knob type, compact type, type for thin plates, flange type, button type, lever type, pin detachable type, and push type index plungers. Below is a brief introduction of each component.
The ring type is operated by tilting down the ring to save space at the top, while the T-shaped knob type is easy to grip and operate. The knobless type can be replaced with a lever or knob as desired, and can be automated when used in combination with an air cylinder. The special knob type can be operated by turning the knob. Compact type can be used in small spaces. Thin plate type can be used for thin plates. Flange type can be used on the wall of equipment and devices. Button type can be operated by pushing a button to insert or remove the pin. Lever type pins can be inserted and removed by turning a lever. The pin removable type allows the pin to be removed and reattached, making it easy to replace or add pins. In the push type, the pin is ejected when the knob is pushed, and stored inside when the knob is released.