Bench Vise Size Guide

The naming number on a bench vise is the width of the jaws — a "6″ bench vise" has jaws roughly 6 inches wide. Everything else (opening, throat depth, weight) is a separate specification printed below it.

Because jaw width is the headline number, it dominates a first comparison. But two vises with the same jaw width can have very different openings and throat depths.

Bench vises cluster into light, medium and heavy duty, each with a familiar size range: light-duty vises run 2″-5″ jaws, medium-duty 5″-8″, and heavy-duty 8″ and up. A 4″ light-duty bench vise suits hobby work, the 6″ medium-duty bench vise is the workshop standard, and an 8″ heavy-duty bench vise handles fabrication.

Bigger jaws mean more mass, which means more rigidity — but also more bench. The heavier the vise, the stronger the bench top it needs.

The jaw opening is the biggest gap between the jaws, and it is the number that really matters when you clamp a thick workpiece. A generous opening swallows pipe, castings and assemblies that an undersized vise simply cannot hold. The dedicated guide covers it in full: how much jaw opening you need.

Throat depth is the reach from the top edge of the jaws back to the body — the space into which a workpiece stands while you work the top surface. It limits files, saws and grinding work on vertical faces. Details are in how much throat depth you need.

A heavy-duty vise can weigh 50-80 lbs and puts real load through the bench. Match bolt size and spacing to the top, and reinforce thin faces. Mounting quality decides whether the clamping force ends up in the workpiece or in a flexing table.

Size tells you capacity, not longevity. The body material and jaw construction decide how long that capacity lasts under use, which is why the full decision process starts with how to choose a bench vise.

For volume or OEM programs, the manufacturing team can size a custom opening and throat for your application from a proven platform.