Fig. 2118.
If the eye of a circular saw is loose, or, in other words, if it is rim bound when running, it will dish, as in [Fig. 2118], and the rounded side rubbing against the side of the saw slot or kerf, will cause the saw to become heated and the eye to expand more than the outer edges, thus increasing the dish. But if the saw strikes a knot on the hollow side it may throw the dish over to the other side of the saw in an instant. The remedy is to hammer the saw with the dog-head as shown in the figure, not touching the eye, and letting the blows fall closer together towards the circumference.
Fig. 2119.
Fig. 2120.
