Circular saws with inserted teeth are made of thicker plate than solid saws of corresponding diameters, which is necessary in order that they may securely hold the teeth. The principal difference in the various forms of inserted teeth lies in the method of locking or securing the teeth in the saw.
Fig. 3085.
[Figs. 3084] and [3085] represent the chisel tooth saws of r. Hoe and Company. The No. 2 tooth is that used on gang edging machines and for bench work. No. 3 tooth is that used in miscellaneous sawing, for hard woods and for frozen lumber. No. 4 is the shape used in the soft and pitchy woods of southern and tropical countries.
The method of inserting the teeth is shown in [Fig. 3084] on the left, the pin wrench being shown in position to move the socket whose projection at c carries the tooth d home to its seat and locks it there.
The sockets for the numbers 3 and 4 tooth are, it is seen, provided with a split, which gives to them a certain amount of elasticity that prevents the sockets from getting loose.
Swing-frame saws are made in various forms, generally for cross-cutting purposes or cutting pieces to length.
