Small Sawmills: Their Equipment, Construction, and OperationU.S. Department of Agriculture, 1918 - 68 Seiten |
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band saw bevel boiler boxes bunk cant hooks capacity carriage cent chain chute circular saw class A mill cost crosscut saw cubic foot cutting teeth cylinder dray edger engine equipment feed feet long feet per day friction front gang gauge gear grade grain hammer handles haul head block head saw holes horsepower horses husk frame inch scant inches in diameter inches wide inserted teeth inserted-tooth keep kerf length load log side lumber machine mean effective pressure one-half piece pile pinion pipe pitch planer portable mill pounds pressure properly pump rack rack and pinion raker revolutions per minute road roll round sawdust sawmill sawyers scale skids skidway slabs small mill solid-tooth speed steam steel straight edge stringer surface swage swamp hook sway bars swedge teamster timber tooth track tree truck usually valve velocity weight wheel width wood yard