 
          while placing the clamp around the parts and pressing the
        
        
          sliding jaw up to the assembly. Lock the sliding jaw in place,
        
        
          and then finish clamping the assembly by tightening the
        
        
          wing-head thumb screw on the fixed jaw. Since I primarily
        
        
          scratchbuild with styrene, and don’t build wood laser kits,
        
        
          my need for this type of clamp is limited.
        
        
          Machinist clamps (9) are fairly specialized clamps.
        
        
          Considerable clamping pressure can be applied to an object
        
        
          by inserting a rod in the hole through the knurled caps on the
        
        
          screws to increase leverage. They work very well in situations
        
        
          such as drilling, soldering, or machining, where considerable
        
        
          pressure is needed to hold the work so it will not move.
        
        
          I’ve had several different friction clamps over the years such
        
        
          as the ones in (10), which rely on friction to hold them in
        
        
          9: The jaws on these machinist clamps are tightened by
        
        
          turning one screw in while turning the other screw out.
        
        
          
            9
          
        
        
          The Tool Shed - 5
        
        
        
        
          MRH-Mar 2013