Best for CNC milling, these clamps combine 10 times the force of air-powered clamps with automated swing action for fast, secure workholding. Their clamping arm (sold separately) rotates up and out of the way when not engaged, so you can easily insert and remove your workpiece.

Connect your hydraulic line to the back or the bottom of the clamp. All ports are sealed with an O-ring and a screw; unseal the port you want to use.

Single-acting clamps only use pressure to clamp down on a workpiece. When you release the pressure, a spring returns the clamping arm to its original position. They’re a good choice for simple setups, where you only need one or two clamps.

Double-acting clamps use pressure both to clamp and release a workpiece, giving you precise control over the process. They’re more efficient than single-acting clamps, since their release is quicker and more predictable. They’re a good choice if you need to coordinate the action of multiple clamps.

Choose a clamping arm best suited for your application. Machinable clamping arms let you customize the length and shape to suit your application. Because they are longer than standard arms, you’ll have to use lower pressure, and their actual clamping force will be lower than the listed rating.

Maximum clamping stroke is the vertical distance a clamping arm can travel to clamp a workpiece.