Engineer’s vices are available with a variety of different jaw widths, ranging from small and light-duty models to large and heavy-duty models and many in between. The whole vice gets bigger as the width of the jaws increases, so as to be in proportion with the jaws.
The following dimensions apply to all types of engineer’s vice:
Weight
The weight of a vice can range from 12 lbs up to 180 lbs (5-80 kg approx.), depending on its size.
Jaw width
The jaw width is how wide the jaws are from one side to another and is measured by the horizontal distance along the top of the jaw edge.
Smallest available: 75mm (3″ approx.)
Largest available: 200mm (8″ approx.)
Jaw opening
The jaw opening of a vice is how far the mouth of the jaws can open.
Smallest available: 60mm (2.5″ approx.)
Largest available: 300mm (12″ approx.)
Throat depth
The throat depth is how deep the jaws of a vice are and is measured by the vertical distance from the top edge of the jaws down to the top of the screw/slide.
Smallest available: 50mm (2″ approx.)
Largest available: 200mm (8″ approx.)
How to choose an engineer’s vice
The smallest type of engineer’s vice tends to be the mechanic’s ones, as they are designed for lighter-duty work and general tasks around the home, such as cutting or sanding.
As engineer’s and fitter’s vices are designed for heavy-duty industrial use and can weigh anything up to 180lbs, these vices would be ideal if a user needs to clamp large or heavy pieces of metal.
The size of the vice needed depends on the shape and material of the workpiece in hand. If a user wishes to clamp large and heavy objects, then a vice with a greater jaw width/opening and throat depth would be useful, as they have a greater capacity and less restrictions than smaller vices. This is due to their design, which allows them to hold longer or wider workpieces without any risk of breakage.