. Canadian forest industries July-December 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 'JaHESE chains are intended for general power transmission purposes, and are designed to operate on accurately cut wheels. They combine the best features of both the "HS" and "TT" class chains which we have made heretofore. They are constructed to possess all the ele- ments of durability which can be obtained by the proper selection and treatment of the stock, and by the accuracy and finish secured from the most skillful workmanship.
. Canadian forest industries July-December 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 'JaHESE chains are intended for general power transmission purposes, and are designed to operate on accurately cut wheels. They combine the best features of both the "HS" and "TT" class chains which we have made heretofore. They are constructed to possess all the ele- ments of durability which can be obtained by the proper selection and treatment of the stock, and by the accuracy and finish secured from the most skillful workmanship. The practical result is that while these finished chains and cut wheels are more expensive in first cost, they have strikingly demonstrated their ultimate economy in many classes of work, com- pared with the cheaper chains and cast tooth wheels heretofore employed. The working surfaces have an unusually smooth finish, preventing undue wear and fric- tion between inside links and roller, and between inside links and outside links. Uniformity throughout guarantees accuracy of pitch, which is vital to the proper operation of high speed roller chain on cut tooth wheels. SPECIFICATIONS OF "RC" CLASS CHAINS 1. Link Plates (sidebars) of special rolled steel, heat treated for toughness. 2. Pins, nickel steel, case-hardened. 3. Bushings, steel, case-hardened. 4. Rollers, curled, from high carbon steel strip, heat treated for toughness. (Solid rollers used where diameter is less than Y$ inch.) Users have found that these especially treated rollers are tough and resist shock and abrasion much better than solid rollers (regardless of the unfavorable experience some have had with roll- ers not made by the Link-Belt Company). Link-Belt roller chain data book No. 257 gives valuable information as to designs of drives, care and lubrication, prices of wheels, horse powers of chains, etc. Send for a copy. 996 CANADIAN LINK-BELT LTD., TORONTO, WELLINGTON & PETER STS., MONTREAL.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforests, bookyear1922
