It is important to consider a clamp’s capacity before using it, because this provides the user with an idea as to what size of workpiece can be held within the jaws.
The capacity can be determined by considering two of the clamps features: jaw opening and throat depth.
Jaw opening
The jaw opening of a clamp is how far the mouth of the jaws can open.
The opening indicates the maximum capacity of the jaws, meaning that the tool will not be able to clamp an object wider than this.
Throat depth
The throat depth is how deep the jaws of a clamp are, and is measured by the distance from the top edge of the jaws to the side of the frame.
This indicates how far into the throat of a clamp a workpiece can fit.
Check the specifications
To find out a clamp’s capacity, check the product specifications stated by the manufacturer, as information about the the jaw opening and throat depth is often declared here.