SKU: 56278360133

PSS Shaft Seal 2-1/2" Shaft 4" Tube [02-212-400]

Sale price$323.28 Regular price$359.20
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Description

PSS Shaft Seal 2-1/2" Shaft 4" Tube [02-212-400]PSS Shaft Seal 2 1 2" Shaft 4" Tube Shaft Diameter: 2 1 2" Stern Tube Diameter (D): 4" Total Length (A): 9. 625" Total Length (compressed) (Compressed A): 8. 375" Rotor Diameter (B): 4. 2" Carbon Cuff Diameter (C): 3. 75" Stern Cuff Length (E): 2" The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders yards. The PSS Shaft Seal is also

PSS Shaft Seal 2-1/2" Shaft 4" Tube

Shaft Diameter: 2-1/2"
Stern Tube Diameter (D): 4"
Total Length (A): 9.625"
Total Length (compressed) (Compressed A): 8.375"
Rotor Diameter (B): 4.2"
Carbon Cuff Diameter (C): 3.75"
Stern Cuff Length (E): 2"

The PSS Shaft Seal is the number one selling marine mechanical seal
worldwide and is installed as standard equipment by many of the worlds most
reputable boat builders / yards. The PSS Shaft Seal is also recognized as
the premiere retrofit (aftermarket) seal on the world market. Certified by
Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages
and value of installing the PSS as it eliminates the maintenance, constant
adjustment & cost associated with traditional packing type glands. Aside
from these benefits, the PSS Shaft Seal helps to eliminate water in the
bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal
can be easily retrofitted and is available for shafts ranging from 3/4"
(20mm) to 6" (150mm).

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. 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 stainless steel rotor is fit on the shaft
in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This
compression (pre-load) maintains contact between the faces and allows the
PSS to compensate for the thrust from the propeller. 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. The
stainless steel collar is sealed to the shaft by two o-rings that are
recessed into the bore of the collar. These o-rings rotate with the shaft
and stainless steel rotor and do not experience wear during operation.


**As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration.
PYI suggests as preventative maintenance that the PSS bellow be replaced in
six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced."

Bellows may need to be more frequently inspected in an environment where
non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.

The Maintenance Kit includes the items you need to properly maintain your
PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings,
five (5) set screws, four (4) new hose clamps and an allen key.


Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56278360133

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4.6 ★★★★★
Based on 29 reviews
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Heather Jacobs
Lake Worth, US
★★★★★ 5
dogs favorite!
our dog can't get enough of these. we have to buy them in packs like this since they end up in places unknown. they don't get torn up and will last forever!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
J
Verified Purchase
Jan Marie
Natrona Heights, US
★★★★★ 3
Very lightweight and not good for fetching
These balls are very lightweight. They feel like styrofoam. I try to use my Chuckit Chucker to throw them but they don't go very far and the wind will drift them in another direction as they are so light weight. Then, when my dog's saliva covers the ball, the moisture creates a suction in the launcher and the ball won't exit the chucker at all no matter how much force I put into the launch attempt. I guess they might be good for chewers, but not for throwing, if your dog likes to fetch. They would be good for throwing in the house as they won't damage anything.
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Reviewed in the United States on April 17, 2026
J
Verified Purchase
Jadyn
Lexington, US
★★★★★ 5
Shockingly impressed
I have a heeler and he destroys everything. I thought I was going to be unimpressed at first thinking these were going to be shredded everywhere, but I have yet to see him destroy these and we have had them for over a month. I definitely recommend for high energy aggressive chewers.
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Reviewed in the United States on May 26, 2026
B
Verified Purchase
Brad Alan Tennant
Massapequa, US
★★★★★ 1
Cheap and easily destroyed!
I bought these balls because they are advertised as indestructible. Frankly, tennis balls last 5x longer! We breed Cane Corso, and these don’t last even a few minutes with them. Definitely not indestructible and definitely not for aggressive chewers. Very disappointing. The search continues….
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Reviewed in the United States on March 22, 2026
K
Verified Purchase
Kailynn
New York, US
★★★★★ 5
Great balls
So far so good. Belgian/pyrenees mix that loves chewing and destroying toys. He’ll have a hard time destroying these. They are light but carry well once thrown outside. Being light they are good inside on very cold days compared to something like a lacrosse ball. Better than Chuck It brand.
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Reviewed in the United States on February 7, 2026

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