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Reducing Maintenance On Overhead Cranes
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PROBLEM
Our customer was relining his drum brake shoes every 2-4 weeks. Since we were supplying the linings, it was good for us but we realized it was not good for our customer. We suggested that they let us review the application.
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SOLUTION
We found their highest usage was on their shipping cranes, which operated at capacity 24 hours-per-day, 7 days-a-week. The existing hoist brake was a 13-inch drum design. After a careful review of the mounting and envelope, we proposed a 17-inch diameter disc brake. We knew that the increased swept surface would significantly reduce the contact temperatures. As a result, we anticipated a large drop in friction wear.
It took a mounting modification, but they agreed it was worth a try. We were both right. The new caliper disc brake lasted a year prior to friction puck change. Since then, our customer has upgraded the brakes on all of their shipping cranes and is now working on production cranes.
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