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SECTION VII
COMPONENT SYSTEM DESCRIPTIONS
A. TUMBLER DRIVE SYSTEM
The tumbler is supported and driven by four (4) 11-inch (27.94 cm) diameter drive wheels. Two (2) of these wheels
are attached to a 1-1/2" (3.81 cm) diameter idler shaft, while the other two (2) are attached to a 1-1/2" (3.81 cm)
diameter drive shaft. Each of the wheels is fastened to the shafts by a taper lock bushing. The taper lock is made up
of three (3) pieces, an inner collar, an outer sleeve, and a key. The inner and outer elements have matching opposing
tapers. As a result, when the bolts are tightened, the taper lock contracts onto the shaft and expands into the drive
wheel hub, locking the wheel onto the shaft.
The idler shaft and drive shaft are each supported by two (2) 1-1/2" (3.81 cm) diameter pillow block bearings. These
bearings sit on slotted support channels and can be moved inward or outward by the adjustment bolts to raise or lower
the tumbler.
The drive system consists of a shaft mounted gear reducer, two (2) V-belts, and a 3 hp (2.24 kW) drive motor. Belt
tension can be adjusted by tightening or loosening the gear turnbuckle.
TUMBLER DRIVE SYSTEM
62
American Dryer Corp.
113550 - 5
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