TM 9-243TYPES AND USESC-CLAMPSHAND SCREW CLAMPSC-clamps are used to hold work which cannot be held ina vise, or which has to be held for extended periods oftime. They are available in a variety of sizes.The hand screw clamp is made up of two hardwood orhigh impact plastic jaws (1) and two hand-operatedscrews (2) which hold the clamp together. The handscrew clamp is used for holding wood while gluing. Theyare available in a variety of sizes.USING A C-CLAMPSelect a clamp which has an opening about 1-1/2 to2 inches wider than the material to be clamped.Glass and highly polished surfaces must be pro-tected. Use brass shims or wooden blocks. Openclamp as wide as it will go.2Align work and protective blocks if required. Placeclamp (1) in position, and tighten operatingscrew (2) until contact is made with material beingclamped.3Check alignment of material being clamped. Checkthat the clamp is applying even pressure over entiresurface.CAUTIONDo not use wrenches or bars to tightenclamps.4Tighten clamp against surface.19-2
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