Woodworker's Journal 2011-35-1, страница 69

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Several hollow turnings created by the author.

depth of the vessel being turned. Where they differ is in the design of their cutting tips, which fall into three general categories depending on their shape and cutting action:

Scrapers come in a variety of shapes and sizes, many with interchangeable or replaceable tips. (See photo, opposite page, far left.) Typically, scrapers are flat on top and have relatively blunt relief angles. They cut by a scraping action against the inside wall of the workpiece, leaving a roughened texture on most woods. Scrapers arc generally presented dead horizontal to the center of the workpiece. The straight scraper is always held horizontal during cutting, while the bent scraper can be dipped downward a few degrees on finish cuts to give a shearing action.

Carbide insert tools have a razor-sharp, cup-shaped cutter screwed to the tip of the tool shank. (Sec photo, above right.) The replaceable cutter tip may be rotated to expose a fresh edge when needed. These tools arc usually tilted at an angle to the surface being cut to create a shearing action that leaves a smooth surface, even on stringy or difficult wood.

Insert cutters should never he presented in a level orientation

Turning Wooc ovar a moving lathe to shape it irto various designs has existed since at least the time of the ancient Egyptians —Assuuiatiuri of Woodturners: Great Britair

Carbide Insert Tools