Pneumatic Chuck

How does a pneumatic chuck work?

As the name shows, a pneumatic chuck is driven pneumatically by a mounted or integrated cylinder. They are mostly used, like other chuck tools, as clamping or holding machines, stationary clamping tools on special machines, drilling, and milling machines in any manufacturing process. This kind of chuck does not require space for installing any hydraulic unit. Therefore, pneumatic chuck is suitable for the fast opening/closing movements of the clamping device. And due to the low permissible operating pressures, larger pneumatic chucks are usually required to provide the necessary clamping forces.

However, since the price of such devices is usually very high. It is recommended to have basic knowledge of pneumatic chucks in order to avoid misuse or false plan on the user’s working site. Also, there is surely a lot of similar devices on the market. How can the customers choose the best one for themselves? Here are some facts about pneumatic chuck that can help customers to make better and smarter decisions. For further information, please read the following content.


Main characteristics of the pneumatic chuck

Here are the main features of the pneumatic chuck.

1. Accuracy

It provides constant clamping power at a pre-set pressure. Therefore, the clamping accuracy during the working phase remains consistent and accurate.


2. Compatibility

The use of stepped jaws, non-hardened attachment jaws, and other types of accessory jaws as possible.


3. Separated system

The air distribution system is separated from the chuck. It makes repairing work much easier.


4. Safety

Pneumatic chucks have twin non-return valves. That is to say, during the use of the devices, users do not have to worry about any incidental touch or shut down.


Other types of chucks

As a comparison, here is the information on other types of chucks that are commonly used, including drill chuck, tapping chuck, magnetic chuck, and jawed chuck.

1. Drill chuck

A drill chuck is specialized for clamping/holding workpieces. It is designed in a rapid symmetry shape. It holds firmly onto the rotating objects.


2. Tapping chuck

A tapping chuck, or tapping holder, is mostly used for assisting to cut threads. Tapping chucks power the gripping force in a unique way, which makes them the best option in thread cutting work.


3. Magnetic chuck

When there are ferromagnetic objects that need to be processed, magnetic chuck comes into use. Usually, as the name shows, it consists of a permanent magnet. There two subcategories of magnetic chuck, which are electromagnets and permanent magnets. For permanent magnets chucks tools, it does not need the power to activate. Thus, the advantage is energy-saving, but it takes other special mechanical design to control the device. Electromagnet chucks have the benefit of quick activation. Among all types of chucks, it has the shortest responding time. Also, compared to a permanent magnetic chuck, it has a more consistent, stable, and greater holding power. For serving in heavy-duty industries, they are the best options.


4. Jawed chucks

In short, many variations of jawed chucks are available. Self-centering jawed chucks, drill chucks, independent-jaw chucks tools, and other special jawed chucks serve for different purposes and industries. It has jaws that tighten or loosens as the objects are gripped. They can be operated with or without a key.


5. Electrostatic chucks

These power chucks are mainly used in the high-tech industry when producing silicon wafers. During the lithography process, they are responsible for holding the wafers. The structure of an electrostatic chuck is the combination of a metal base-plate and a thin dielectric layer. With a metal plate, the chucks can be used at a high-voltage, which is important when it is used for a gripping silicon wafer.


6. Vacuum chucks tools

Vacuum chuck is a kind of power chucks. They are mainly used for gripping/holding non-ferrous materials, like copper, bronze, aluminum, plastics, and stone. They can all be properly gripped and working with a vacuum chuck. When it is working, the air is to be pumped out from a cavity behind the workpieces. Then, atmospheric pressure provides the holding force.

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