RTP Company: The Global Leader in Specialty Compounding

End-Use Case Study —

Motor Wear Bearing

Trouble with fishing lines, nets and weeds have always plagued pleasure, military and commercial water craft. SPURS® LINE, NET AND WEED CUTTER, Fort Lauderdale, Florida makes a cutter that instantly cuts through these nemeses to boating fun and / or business. The cutter is the most cost effective way to protect against bearing and bearing seal damage and idle dry-dock time, from the world's largest ships to the smallest. The principle that enables the shaft mounted "SPURS" to cut so effectively is the "screw action" created as the propeller turns--winding line, nets or weeds directly into "SPURS" blades, instantly cutting before allowing entanglement or damage to the running gear.

RTP Company plays a part in this efficient design by providing the custom compound for wear bearings which separate the spinning metal cutting blades. The bearings are water lubricated and hydroplane on a film of water at all times while spinning. The clarity of the water in which a vessel cruises has a direct relation to the life of the water bearing. Sediment and abrasive silt found in rivers and waterways becomes a contributor to accelerated bearing wear. Wear is negligible when running in clear lakes and deep oceans because abrasive silt is almost non-existent. Cost and wear improvement over the original cast urethane bearings led to the selection of an RTP Company aramid- and PTFE-filled nylon 6/6 material for the injection molded parts.

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