Lasdrop has been making shaft seals since 1975, and Lasdrop Shaft seals have become widely used by both commercial and recreational boaters who value a reliable and durable shaft seal. ![]() These o-rings rotate with the shaft and stainless steel rotor and do not experience wear during operation. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. The carbon flange is bored larger than the shaft diameter allowing it to “float” around the shaft and thus compensate for most misalignment and vibration problems. This compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. ![]() The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. The stainless steel rotor is fit on the shaft in front of the carbon flange. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The PSS Shaft Seal is a mechanical face seal that is created between the flat surfaces of the rotating stainless steel rotor and the stationary carbon flange. Boat builders and Ship yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment & cost associated with traditional packing type glands. ![]() The PSS Shaft Seal can be easily retrofitted and is available for shafts ranging from 3/4" (20mm) to 8" (205mm). The PSS Shaft Seal helps to eliminate water in the bilge (100% water tight) & wear to the propeller shaft.
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