Hydraulic chucks are an important tool in any fabrication shop. They allow you to quickly change the diameter of your workpiece, which makes it easier to machine parts with precision. Hydraulic chucks are also useful for turning, milling and boring
Hydraulic chuck sizing is based on the size of your workpiece. The smaller the diameter of your workpiece, the larger the hydraulic chuck will be. This means that if you have a small 5/8" diameter shaft and need to machine a piece that's 1/2", you'll need a larger 7/8" size hydraulic chuck
In this article, I'll go over how to use hydraulic chucks by explaining how they're operated by hand and by CNC machines. First off, let's talk about manual hydraulic chucks. Manual hydraulic chucks can be operated manually or automatically through a system of pneumatic cylinders located within the machine itself. Manual hydraulic chucks use air pressure to move parts around inside the machine while they're being machined or turned on CNC turning centers. This means that when you insert your part into the chuck, it's held firmly in place until you release it
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