Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 105

Hodgson made a number of experiments on saws to test their qualities, and arrived at the following conclusions: (1) A saw with a thick blade is, in nine cases out of ten, of inferior quality, and is more apt to break than a thin-bladed saw; it requires more set, will not stand an edge nearly so long as a thin one, is more difficult to file, and, cutting a wide kerf, is more tiring to use. (2) Saws hung in plain beech handles, with the rivets flush, are lighter, easier to handle, less liable to receive injury, occupy less space in the tool-chest, and can be placed with other saws without dulling the teeth of the latter by abrasion on the rivets. (3) Blades that are dark in colour, and have a clear, bell-like ring when struck with the ball of the finger, appear to be of better stuff than those of a light iron-grey colour; and he noticed, in proof of this, that the thinner the blade the darker was the colour, and that saws of this description were less liable to buckle or twist. (4) American-made saws, as a rule, are better hung than English ones. (5) Polished blades cut more freely and much more easily than blades left in the rough, and are less liable to rust. (6) Saws that when held by the handle and struck on the point with the hand ring clear and without tremor, will be found to be securely handled; saws that when struck on the point of the blade tremble and jar in the handle never give satisfaction.

Fig. 309.—Hammer for Setting Hand Saws.