Advanced Toy Making for Schools Part 6

#57. The Universal Saw.#--The operations that can be performed on the universal saw are so many that no attempt will be made to ill.u.s.trate them all here. But enough are given to show the characteristic operations involved in cross-cutting, ripping, and dadoing,--the three basic uses of a circular saw.

[Ill.u.s.tration: Fig. 38. Grooving, or ripping special work]

It is a more dangerous tool than the lathe and the guard should be kept over the saw at all times, except of course, in dadoing when it can not be used.

Figs. 35, 36, 37, 38, 39, ill.u.s.trate the basic uses of a circular saw.

[Ill.u.s.tration: Fig. 39. Cutting segments]

[Ill.u.s.tration: Fig. 40. Surfacing board on jointer]

#58. The Hand Jointer.#--The great variety of work that can be done on a hand jointer depends very largely upon the knowledge and skill of the operator. It lends itself to so many operations, that the student gains much in knowledge and efficiency.

[Ill.u.s.tration: Fig. 41. Cutting bevels on jointer]

The five operations shown in Figs. 40, 41, 42, 43 and 44, give a fair idea of the scope of work that is usually accomplished on a hand jointer and show something of the method by which the work should be done.

The jointer is another tool where the use of the guard should never be omitted.

#59. The Sander.#--The sander is an interesting machine in the school shop for on it considerable "forming" can be done as with the lathe, altho its prime use is to make smooth or polish.

[Ill.u.s.tration: Fig. 42. Jointing the edge]

In Fig. 45 the boy at the left is forming a mitre while the one on the right is smoothing surface.

[Ill.u.s.tration: Fig. 43. Rabetting on the jointer]

[Ill.u.s.tration: Fig. 44. Cutting miter joints]

[Ill.u.s.tration: Fig. 45. The machine sander in operation]