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The GIBRALTAR GSI50 is a sliding arm bar clamp engineered for heavy-duty fastening applications where consistent, high-force clamping is required. Built on the GSI series rail platform with a 30.00 x 15.00 mm rail, it delivers 2,600 lb of clamping pressure through an alloy steel spindle and a T-handle for firm, controlled tightening. The frame and pad are both forged steel with a nickel finish, providing durability under repeated shop or field use. This clamp is typically installed or operated by machinists, fabricators, millwrights, and maintenance technicians handling structural assembly or fixturing tasks.
The GSI50 is suited for workshops, fabrication shops, and industrial maintenance environments where a 5.5-inch throat depth is needed to reach deep into a workpiece or assembly. Its forged steel construction makes it appropriate for ferrous and non-ferrous metal fabrication, woodworking jigs requiring high clamping loads, and fixture setups on machine tables or welding positioners. The T-handle design allows one-handed pressure adjustment during setup.
Designed as an OEM-style replacement or direct-use clamp for applications requiring a GSI series 30.00 x 15.00 mm rail bar clamp with a 5.5-inch throat depth.
Installation and operation should be performed by qualified machinists, fabricators, or maintenance technicians familiar with mechanical fastening equipment. Inspect the clamp body, spindle, and pad for cracks or deformation before each use. Do not exceed the rated clamping pressure of 2,600 lb. Ensure the workpiece and mating surface are properly supported to prevent shifting under load.
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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