Pretinning Tips Manually

The majority of our saws are tipped on the automatic tipper, however there are times when we are required to pretin the carbide ourselves. We start with metal plates and layout the carbide. It is necessary to keep  a margin of space around the outside edges, as the silver solder on the outside carbide tips will  melt, or “puddle” sooner than ones closer to the centre.  Next we put a dab of black flux on the side of the carbide tip that will be brazed to the saw, then we apply a piece of silver solder. The tips are fired in a kiln until the silver solder puddles, once cooled they are tumbled in a rock tumbler to be cleaned , they are then ready to be brazed onto a saw by hand.