. Canadian forest industries July-December 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. CANADA LUMBERMAN No. 2 Columns WHY 255 WATEROUS BAND MILLS HAVE BEEN PURCHASED Much of the clear cut, business-like appearance of the Bandmill is due to the graceful yet massive design of the columns supporting the upper wheel. They are firmly fastened together at the lower end by heavy bolts and further braced by a through going steel shaft of large diameter. Located centrally on the bed, their wide bear- ing on the same, and the strength of their const
. Canadian forest industries July-December 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. CANADA LUMBERMAN No. 2 Columns WHY 255 WATEROUS BAND MILLS HAVE BEEN PURCHASED Much of the clear cut, business-like appearance of the Bandmill is due to the graceful yet massive design of the columns supporting the upper wheel. They are firmly fastened together at the lower end by heavy bolts and further braced by a through going steel shaft of large diameter. Located centrally on the bed, their wide bear- ing on the same, and the strength of their construction eliminates vibration and ensures steadiness and rigidity in the whole mill, even when doing the heaviest work. The raising and lowering screws, the tension device, and the tilting mechanism are all enclosed within the lower half of the columns, where they are kept quite free from clogging by sawdust, and in the best of condition. Both columns are recessed on their forward faces and the heavy posts which support the upper mandrel bearings work in special babbitted housings placed above and below the recesses. This method of carry- ing the upper mandrel is not only more rigid than the old construction, where the mandrel was carried above the top of the columns and posts, but allows for a wider range of adjustment between upper and lower wheels, as the posts are held equally rigid at any height. The upper mandrel bearings are extra long, babbitted with the finest babbit, are water cooled and self oiling, and are pro- vided with an arrangement for cross lining. The vertical posts which support them are raised and lowered simultaneously by means of vertical jack screws operated inside the columns. These work within brass nuts fastened into the lower end of each post, and are in turn sup- ported on a short knife edged steel shaft provided with a rol- ler-bearing collar. Upon this collar the bottom of the screw turns freely, without affecting the position of the knife edge. Th
Size: 1386px × 1803px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectforests, bookyear1922
