. Canadian forest industries 1880-1881. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 16 THE CANADA LUMBERMAN. EMERY WHEELS FOR SAW GUMMING!. Solid Emery Wheels are now almost In universal use for the purpose of gullettlng and gumming saws. Statistics show Bon 25,000 to 30,000 saw-mills in the United States. Many of these run only a single saw each. A one-saw mill would use one or two wheels a year, casting $3 to $4 each, and when such small mills order single Emery Wheels from the factory, the express charges often equal the cost of the wheel. Th
. Canadian forest industries 1880-1881. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 16 THE CANADA LUMBERMAN. EMERY WHEELS FOR SAW GUMMING!. Solid Emery Wheels are now almost In universal use for the purpose of gullettlng and gumming saws. Statistics show Bon 25,000 to 30,000 saw-mills in the United States. Many of these run only a single saw each. A one-saw mill would use one or two wheels a year, casting $3 to $4 each, and when such small mills order single Emery Wheels from the factory, the express charges often equal the cost of the wheel. There was a lime when the quality of Emery Wheels was so uncertain, and the demand so fickle, that storekeepers could not afford to carry them In stock. Now, however, Saw Gumming Wheels have become as staple an article as Files, and every dealer In saws, Hardware and Mill Supplies can afford to carry a few dozen standard sizes In stock. Large dealers order stocks of $500 to $750 worth at a time. Saw Gumming Wheels are used with the edge (or face) square, round, or beveled. Probably seven-eigtbs of all In use are beveled. Tne principal sizes are: 8xJ 8x2 8xS in. hole. 10x1 \ 10x3 10x1 > * m- hole- 10 Holes, 2, i and 1 inch. Probably more wheels 12x1, 12xj and 12xj arc used than all the other sizes together. Saw Gumming Whe-Is are used however, of all sizes up to24xlJ. The most frequent complaint is that Emery Wheels harden the saw so that a file won't touch It. The answer is that you don't want a file to touch it. An expert workman will shape and sharpen the teeth with an Emery Wheel, leaving the teeth case hardened, in which condition the saw will cut about 33} per cent, more lumber than a soft saw will. Those who want to use the file, however, have only to touch the 6aw lightly a second time (after going all over It once) and this second touch will cut through the case-hardened scale. _A. QUESTION" OIF QTJALITT. Thirteen yeurs of experience as makers of, dealers in, and
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