61508 - Piher Maxi-R 80cm Heavy Duty Piston F-Clamp Reversible

The Ultimate Spatter-Proof Welding Clamp

For professional welders and metal fabricators, the Piher Maxi-R 80cm Reversible Clamp is a game-changer. The most common failure point for clamps in a welding environment is the accumulation of weld spatter on the threaded screw, which eventually causes the mechanism to seize. Piher solves this problem completely with their patented Encapsulated Piston System. The screw is entirely hidden within a protective steel housing, making it impervious to hot spatter, grinding dust, and metal shavings. This means you can clamp right next to the weld zone without worrying about damaging your tool.

Beyond its durability, the Maxi-R is a powerhouse of functionality. It delivers a massive 1984 lbs (900 kg) of clamping pressure, essential for forcing stubborn steel members into alignment before tacking. The jaws are made from nodular cast iron, which withstands high temperatures and rough handling typical of fabrication shops. The 35x8mm steel bar is robust enough to maintain pressure without flexing, ensuring your fit-up remains precise and square.

Fabrication often requires pushing as well as pulling. The Maxi-R features a reversible jaw design that transforms the clamp into a powerful spreader. This is invaluable for aligning pipe sections, spacing frames, or pushing plates apart. The transition takes seconds and requires no extra tools. The clamp also features a greasing hole in the handle, allowing for easy maintenance of the internal mechanism without disassembly. With an 80cm (32-inch) opening and a deep 12cm throat, this clamp provides the reach and power needed for heavy structural steel work, tank fabrication, and general MRO tasks.