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SECTION VII
COMPONENT SYSTEM DESCRIPTIONS
A. TUMBLER DRIVE SYSTEM
The tumbler (basket) is supported and driven by four (4) 11-inch diameter drive wheels. Two (2) of these wheels
are attached to a 1-1/2”diameter idler shaft, while the other two (2) are attached to a 1-1/2”diameter drive shaft.
Each of the wheels is fastened to the shafts by a locking bushing. The taper lock is made up of two (2) pieces;
an inner collar, and an outer sleeve. The inner and outer elements have matching opposing tapers. As a result,
when the nut is tightened, the trantorque 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” 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 (basket). The drive shaft sticks out through the back of the dryer and has a 2B V-belt pulley
attached to it with a keypad taper lock bushing. This pulley is connected to a speed reducing idler and then to the
3 HP drive motor by 2 sets of V-belts.
The speed reducing idler shaft is supported by two (2) 1-1/4-inch diameter pillow block bearings. These pillow
blocks sit on a slotted platform, and they can be moved forward and back by loosening or tightening the bearing
adjustment bolts. This movement is needed to maintain proper tension on the V-belts that run from the
speed-reducing idler to the drive shaft.
The drive motor sits on an adjustable base so that the motor can be moved forward and back, allowing proper
tension to be maintained on the V-belts that run from the motor to the speed-reducing idler.
B. TUMBLER/BASKET
The tumbler (basket) is made of 14-gauge stainless steel perforated panels, four (4) stainless steel ribs, and two
(2) outer tumbler/basket rings made of rolled steel angle iron that has been turned on a lathe for smoothness. The
tumbler (basket) is a completely welded assembly so the perforated panels are not removable.
C. AIR BLOWER DRIVE SYSTEM
The impellor (fan) used in the AD-200 dryer is a 15-inch diameter backwardly inclined squirrel cage impellor
(fan) wheel. It spins in a counterclockwise (CCW) direction looking at the back of the blower housing.
The impellor/fan shaft is mounted in two (2) 1-3/8-inch diameter pillow block bearings, and the shaft is driven by
two (2) B-section V-belts connected to the blower motor.
The blower motor is mounted on an adjustable base. The motor position can be easily adjusted so that proper
tension can be maintained on the V-belts.