| 摘要 |
A mechanical, infinitely variable blade speed drive for a band saw is provided with a speed control which includes a variable pitch drive pulley with axially adjustable sheave spacing to vary the drive ratio between the drive pulley and the driven pulley and a control shaft parallel to the drive shaft of the motor which carries the drive pulley. The control shaft extends to the front portion of the band saw so that the speed adjustment control carried thereon is readily accessible to the band saw operator without moving away from the front portion of the band saw during its operation.
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