. Canadian forest industries 1910. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 32 CANADA LUMBERMAN AND WOODWORKER will in reality give more power. One concern ran a 14-inch red canvas belt from one motor to the line shaft, transmitting some 30 horse power. There was a 10-inch pulley on the motor and a 42-inch pulley on the line shaft, and the distance from centre to centre was only 21 feet. There was a good deal of trouble with this arrangement. The belt was not long enough and the drive pulley was too small for the load. The belt, however, stoo
. Canadian forest industries 1910. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 32 CANADA LUMBERMAN AND WOODWORKER will in reality give more power. One concern ran a 14-inch red canvas belt from one motor to the line shaft, transmitting some 30 horse power. There was a 10-inch pulley on the motor and a 42-inch pulley on the line shaft, and the distance from centre to centre was only 21 feet. There was a good deal of trouble with this arrangement. The belt was not long enough and the drive pulley was too small for the load. The belt, however, stood the strain for over a year. The concern next tried an endless double leather belt about 15 feet longer than the canvas belt and the motor had to be moved back to accommodate it. For the first few weeks there was much slipping, but later it became perfectly ad- justable and not since, some three years ago, has it given any trouble. For overhead counter-shafting rubber belts are found satisfactory, in most cases. After a rubber belt begins to split it might as well be thrown away, for it will not last long. Double leather belts are very good but they should not, according to many mill owners, be used on pulleys under eight inches. On smaller pulleys there is too much slippage, more than is really noticed, and the belt wears away on the under ply. Rope transmission is fast coming into use. Its specific place in the factory is from the engine or motor to the line shaft; and for this pur- pose it is considered as just the thing. The use of the tighteners does away with slipping and the drive can be extended almost to any distance and around all kinds of obstructions. The friction drive for special purposes is also coming into use. It is a positive drive, with variable speed, and can be used on several kinds of woodworking machinery. In the case of the quarter-turn belt there is much dissatisfaction. Mill owners, as a rule, do not favor it, and have discarded it wherever possible.
Size: 1432px × 1745px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
