Spurs Rope Cutter - Maintenance
This page is lifted from the Spurs website. I down load and store this type of information because it always seems that when I really need it - the internet is not available. Best refer directly to their site is you can.

SPURS Line cutter are fitted with long-life kevlar-teflon wear bearings which separate the spinning metal cutting blades. The bearing 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 wear 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.

Bearing wear ultimately results in metal-to-metal contact of the spinning cutter blades, causing them to strike each other as they rotate, thereby indicating that a bearing change is required. Annual replacement more often may be necessary when cruising in an abrasive silted environment that causes premature bearing wear. We have reports of wear ranging from 50 hours to 3,500 hours of cruising time between bearing changes, indicating a direct relation to water clarity and bearing life.

Service requirements for Spurs Line & Net Cutters
Do a positive check to determine if bearing change is needed!
Tightly squeeze cutter blades together.
Figure 1) When blades do not touch and light can be seen between blades, this indicates bearings have not completely worn approximately 0.010 (0.25mm) between blades assures bearing change is not necessary.

Figure 2) When blades touch (metal-to-metal), this indicates bearings are worn and must be changed.

 

 

To prevent electrolysis the stationary cutter must have a zinc anode attached as shown below:
Electrolysis prevention for Spurs stationary cutter assembly only.

Spurs stationary cutter parts are electrically isolated by the bearing material and sound dampening urethane plugs; therefore, these castings must be protected by our specially designed zinc anodes. The zinc anodes is fitted to the stationary cutter blade protecting it from electrolysis. They have zinc anodes for every Spurs model available at all times and they can be purchased directly online.