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Two rollers with envelopes moving between them had to
allow for varying thicknesses as the envelopes moved through the machine. The upper roller
moved up and down compensating for the changing thickness; the lower roller drove the
envelopes through the system.
The coupling that was used previously was an elastomer type, but because of the heat
generated, it was unable to maintain the life the customer needed. The challenge was to
provide not only the angular misalignment, but also be price competitive. When the test
and evaluation was completed and the first year's order for 50,000 pieces was received, we
were hit with our second challenge. Even after placing the order with us, the customer was
still trying to use a less expensive coupling. They chose a delrin unit which survived
their testing program. However, when put out in the field it was found that the system
heated up during operation. The heat caused oil from the bearings to drip and come into
contact with the delrin coupling, causing it to slip and the system to malfunction. The
maintenance people demanded that the Helical coupling be brought back.
When the Helical Application Engineer was in the design stage, the main criteria emphasized by the customer was the cost factor. Engineering and Manufacturing worked together to produce a coupling that met all of the requirements needed in their application at the most effective price.
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901 W.
McCoy Lane · P.O. Box 1069 · Santa Maria, CA 93456-1069 Phone: 805-928-3851 · Fax: 805-928-2369 sales@heli-cal.com · engineering@heli-cal.com |
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Copyright © 1997-2007 Helical Products Company, Inc. -- All rights reserved. |
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We manufacture single piece 
