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The GIBRALTAR 428-1085 is a flat soft vise jaw designed as a fixed, bolt-on replacement jaw for 6-inch vises. Machined from aluminum, this jaw measures 6 inches wide, 3 inches high, and 1 inch thick. Soft jaws protect workpiece surfaces during clamping by reducing the risk of marring, denting, or scratching materials that would otherwise be damaged by hardened steel jaws. The fixed jaw configuration and bolt-on attachment method make installation straightforward on compatible vises. Machinists, toolmakers, and general fabrication shops use soft jaws like this when working with finished parts, soft metals, or precision components that require secure holding without surface damage.
This jaw is suited for bench vise applications in machine shops, fabrication facilities, and maintenance environments. It is intended for use with 6-inch vises where a soft, non-marring clamping surface is needed. The flat jaw profile accommodates standard rectangular and flat workpieces. Fixed jaw replacement is a common maintenance task when original jaws show wear or when a shop converts from hardened steel jaws to soft aluminum jaws for a specific class of work.
Designed for use with 6-inch vises as stated by the manufacturer. Verify jaw mounting hole pattern and bolt spacing against your existing vise before installation.
Installation is typically performed by a machinist or maintenance technician. Before replacing vise jaws, secure the vise in a stable position and ensure the vise screw is fully released. Use appropriately sized bolts matching the existing mounting pattern and tighten fasteners evenly to avoid jaw misalignment. Do not overtighten fasteners, as aluminum jaw material can be damaged by excessive clamping force on the mounting bolts.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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