 | Details of equipment:
24" dia. screw conveyor x 40 feet, inclined 45 degrees.
Screw transports corn cob from truck dumping station to processing.
Screw simply lays in trough (no hanger bearings) and drive is in below
ground pit, making it difficult to access.
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| Duty cycle: September thru Mid-November, 24 hrs daily / 7 days per week
Mid-November thru February, 16 hrs daily/ 5 days per week
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| Details of original drive:
Falk 4307J 15:1 Shaft mount. 25HP 1725 rpm Siemens Motor with a 2:1 v-belt
drive on the input side.
Due to problems, a jackshaft assembly and 1:1 chain drive were added to the
system on the output side.
Final output rpm = 57.5
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| Details of Dorris replacement:
Dorris 407TL25 with High Performance packing Gland and 1,12:1 v-belt ratio
to maintain 57.5 output rpm. Eliminated Chain Drive, Jackshaft
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| Why did Dorris get the order?
Original drive would last only 3 to 4 months between failures. Attempting to
extend original gearbox life between failures had cut production by 67%.
Dorris received the order because we agreed to take the drive back if it
failed to perform as promised. Customer’s only expectation was 1 year
uninterrupted service. Dorris warranty is 2 years / 4000 hours.
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| How has the Dorris drive performed, enhanced, simplified, condensed, etc.
the customer’s overall drive package:
Dorris drive has performed flawlessly for 2 1/2 years. Customer is thrilled.
In addition, customer is getting 24 tons of output per hour versus the 8
tons per hour previously.
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