With some types of small combination woodworking machines it is possible to use a bag for catching the sawdust from the circular saw and prevent it from being scattered about the room and over the clothes of the operator. Figure 34 shows a saw with a sawdust chute which serves a double purpose - to guard the blade under the saw table and to catch and discharge the sawdust in one direction. A sugar bag lining is slipped under this chute and fastened to the sides of the saw table with four S-hooks.

Fig. 34. - The sawdust bap in place (upper view) ; and how the holes for the hooks are drilled.

The S-hooks hang in holes drilled in the sides of the saw table. How these holes may be drilled is also illustrated. The tool rest is adjusted to support the saw table at the right height and the work is then fed to the drill by means of the faceplate mounted on the threaded spindle of the tailstock.

A revolving circular saw causes considerable wind, and it is this air in motion which whirls the sawdust about the room. A sugar bag lining acts like a vacuum cleaner bag, for it allows the air to escape but catches the dust. In arranging a bag about a saw that is not shielded under the table, there may be some danger of the bag's becoming entangled in the whirling saw. This should be carefully guarded against.