I have been asked several times to calculate vise openings for various customers with several vise builds. Here is the formula I use to do so. Please keep in mind that different vise builds will change what you need to add to the formula, or change the nomenclature (i.e the “rear chop” on a leg vise becomes “Leg” in most cases, or using an internal garter will change remove the garter from the formula).

The formula is: Screw Length-(hub + garter + front chop + rear chop + nut)= vise opening

2013-09-23 08.04.06