Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 63

The manner of handling and adjusting the cutting iron is a most important consideration, especially when planing against the grain of a brittle wood, such as pitch pine. In planing wood that is cross-grained and liable to rip or tear up, the cutting iron should be set very finely—that is, its edge should be quite close to the edge of the back iron (see Fig. 167), but for the jack plane it must be placed further back, as at Fig. 165. The finer the shaving to be taken off the wood, the closer should it be set. When dressing a difficult wood against the grain, although the cutting edge may be in splendid condition and sharp as a razor, the perfect condition and adjustment of the back iron is also an absolute necessity in order to leave a fine smooth surface. The finer the shaving the smoother will be the surface obtained; and if the edge of the back iron, as it is lying on the cutting blade, is in the least degree rough or does not press evenly and firmly on the whole width of the blade, the shaving will get in between and stop the work. However, it is easy to set the iron too fine, especially when jack-planing soft, straight-grained stuff like pine, which perhaps wants considerably reducing.

Fig. 164.—Unscrewing Plane Irons with Long Screwdriver.

Fig. 165.—Plane Irons Tightly Screwed.

Fig. 166.—Plane Irons Loosely Screwed.