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Circular saw blades are jointed prior to sharpening so that all teeth protrude from the blade the same distance from the centre. Jointer knives are ground until they are all the same length prior to sharpening. The edges of a card scraper are jointed by running the edge over a file or a sharpening stone prior to using a burnisher to turn the burr.
Saw sharpening files are usually single cut to deliver a smooth finish. They are suited to sharpening saw blades and dressing tool edges, especially where a finer, sharper edge or smoother surface finish is desired. The Chainsaw file is one example, used primarily for sharpening chainsaws. These appear to have a round cross-section, but are ...
Sharpening straight edges (knives, chisels, etc.) by hand can be divided into phases. First the edge is sharpened with an abrasive sharpening stone , or a succession of increasingly fine stones, which shape the blade by removing material; the finer the abrasive the finer the finish.
The log is cut in a forward direction as with a single-cut but as the log returns, the saw de-burrs the cut (path where the saw passes) allowing for a cleaner finish. They are run for 4 to 24 hours then sent to the saw filer for maintenance. The saw filer inspects the saw for needed repairs then gums, fits and benches the saw as necessary.
A sawmill (saw mill, saw-mill) or lumber mill is a facility where logs are cut into lumber. Modern sawmills use a motorized saw to cut logs lengthwise to make long pieces, and crosswise to length depending on standard or custom sizes (dimensional lumber). The "portable" sawmill is simple to operate. The log lies flat on a steel bed, and the ...
The cut patterns on ancient boards may be observed sometimes to bear the unique cutting marks left by saw blades, particularly if the wood was not 'smoothed up' by some method. As for preservation of hand saws, twenty-four saws from eighteenth-century England are known to survive. [1] Materials for saw blades have varied over the ages.
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