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Fixtureworks, a US manufacturer and supplier of workholding technologies and machine tool components, has unveiled a range of Imao pull clamps.

The pull clamps are designed to provide high-accuracy workpiece locating, utilising precision-ground clamping pins that are used in conjunction with the fixture-mounted clamp mechanisms.

The clamp devices apply downward pressure on the pins via a quarter turn of the clamp’s handle that actuates a spiral cam (ball-and-groove) design; this, in turn, applies downward pressure on the workpiece and secures it in position.

The accuracy of the pins helps to establish additional locating precision beyond that provided by the fixture, while the ergonomic operation of the clamping base and easy loading of parts make these clamping systems suitable for high-volume, repetitive jobs, according to Fixtureworks.

The clamping bases are offered in two operating ranges, one for standard-duty work loads that includes two versions with clamping forces of 200lbf and 550lbf and a heavy-duty series with two sizes that provide 1,348lbf or 1,798lbf of clamping force.

Each style of clamp features three different hole locations for attaching the handle, allowing users to best select optional clearances for safe, unobstructed operation.

The clamp bases include four drilled and tapped holes for fastening to fixtures, as well as two locating holes for increased precision.

Fixtureworks is also offering a range of clamping pins, clamping screws and mounting plates for use with the clamps.

Clamping pins are provided with precision-ground diameters to fit through holes in workpieces and to facilitate modification by users to accommodate the actual thickness of a workpiece.

The clamping screws enable the pin to be attached to the bottom of the workpiece via tapped holes in the part, eliminating obstructions that would interfere with machining operations.

The mounting plates allow clamp bases to be attached to the plate first; then the plate is top mounted to the fixture base, facilitating mounting, height adjustment, fastening and clamp removal/replacement.

All components – clamps, locating pins, screws and plates – of the pull-clamp systems are manufactured from alloy steel, are heat treated and are given a black-oxide finish.

Handle knobs are made from tough plastic resins.

Fixtureworks has unveiled Imao mini clamps, supports and stops, T-nuts, sliding mounts, springs, grid plates and blocks.

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