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Description
PSS HS 3/4" Shaft Seal 1-1/4" Stern TubeThe PSS (Packless Sealing System) shaft seal is designed as a maintenance free alternative to the traditional packing glands and stuffing boxes. The PSS does not require a greaser drip to lubricate the shaft, if does not require packing and it doesn't need adjusting or maintaining once installed. The design of the PSS seal makes it 100% watertight when installed correctly to prevent water leaking into the bilge, and it also protects the propeller
The PSS (Packless Sealing System) shaft seal is designed as a maintenance free alternative to the traditional packing glands and stuffing boxes. The PSS does not require a greaser drip to lubricate the shaft, if does not require packing and it doesn't need adjusting or maintaining once installed. The design of the PSS seal makes it 100% watertight when installed correctly to prevent water leaking into the bilge, and it also protects the propeller shaft from wear. A mechanical seal is created between a rotating stainless steel 316 rotor and a stationary carbon/graphite stator. The stator attaches to a convoluted rubber bellow which attaches at the other side to the stern tube (shaft log) with the use of hose clamps. The rotor secures to the prop shaft to complete the installation. Because the bellows can compress and expand, fore and aft movement of the shaft caused by propeller thrust does not affect the seal created. The static carbon stator is purposely bored larger than the shaft diameter to allow for any problems caused by misalignment and vibration. Under normal operating conditions, the carbon stator and the stainless steel rotor should never need replacing, and nor should the two nitrile O-rings used to seal the rotor to the shaft. This PSS seal features a rubber bellows which is designed with durability, strength and elasticity all in mind. Seals are available in a wide range of sizes for different propeller shafts and stern tube diameters. All PSS shaft seals are certified by ABS, Bureau Veritas and RINA.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.1 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Compact and accurate scale for Espresso!
Size: 2 kg - Mini Size
Great scale for the money.
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Reviewed in the United States on March 22, 2026
★★★★★ 1
Terrible, bizarre customer service. Don't bother with Tipre! Waste of money.
Size: 2 kg - Mini Size
Glad that some had 5-star experiences but that was DEFINITELY NOT my case. Shorty after the return window the tare become unstable in spite of a fully-charged battery. Tipre requested a video to prove my claims, then requested a SECOND VIDEO, and offered a replacement only if I were to PURCHASE A SECOND SCALE and they would reimburse me. DO I HAVE STUPID WRITTEN ON MY FOREHEAD???? I can throw this scale in the trash and be only $20 in the hole, why risk ANOTHER $20??? Lots of options on Amazon. BUY A DIFFERENT ONE!!
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Great Scale for fine measurements, best I could hope for so give it a go!
I'm using this as an ordinary kitchen scale not as a pour over coffee scale with timer so my review will reflect my usage. I bought because it measures to 0.1grams which is 10 times finer resolution than most kitchen scales like my beloved OXO that died after many years. I don't usually need that fine a resolution but I do need to know to the exact gram so by seeing tenths of a gram I can see exactly how close I am to that 1 gram diference. For example less exact scales aren't sensitive to tiny changes in weight so if you make several tiny additions to get a scale to register 1 more gram it isn't sensitive enough to register those tiny change so to see if you finally added enough flour to get to say 30 grams. With ordinary scakes you have to remove the item from the scale & reweigh the whole thing because a lesser scale just doesn't register tiny incremental additions or subsubtractions. That makes this scale actually accurate to the tiny amounts you add or subtract to get an exact weight in whole grams so its ten times better in my book for less money than my previous scale. The display is very stable, meaning a weight doesn't jump up & down a few times before it settles on the true weight which is exactly how scales should work and its fast. I think the trade off for this increased accuracy is that its upper weight limit is less than the OXO & others but when making 1, 2, or 3 cakes or loaves you need to weigh small addition like salt and spices. If you need to weigh big slabs of meat this scales doesn't weigh heavy enough for that so compare how you will use the scale to it's listed specs when choosing. So far its been very consistent, stable & fast. Also the tare waorks well & quickly plus the auto shut off feature gives you enough time to handle distractions like checking the recipe or openibg a new bag of flour so that function also balances need with the econy of saving batteries. Others have shut off too soon making me totally nuts so keep this little feature in mind.The only minor quibble I have is that it has an orange display which is my least favorite color but its bright & clear to read so no real argument from me & if it holds up over time I will be a very happy woman, but so far so good! I have used it multiple times daily for a couple months now to maintain my Sourdough starter & make bread and it's perfect for that and it has gotten a workout before I wrote this review. I hope it helps you chose as there are so many scales to choose from its difficult to hit all the right buttons but this scale has done that nicely! Happy baking!
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Reviewed in the United States on October 11, 2020
★★★★★ 5
Reliable Coffee Scale with Timer
I’ve been using this coffee scale with timer for a while now, and I’m very happy with it. It does exactly what the description says and has been working perfectly over time.
✅ Accurate measurements – Great for brewing coffee or weighing ingredients.
✅ Built-in timer – Super useful for pour-over coffee and consistency.
✅ Durable – I’ve had it for months and it still works flawlessly.
If you’re looking for a reliable digital coffee scale that’s easy to use and long-lasting, this one is an excellent choice. Definitely worth 5 stars! ⭐⭐⭐⭐⭐
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Reviewed in the United States on September 28, 2025
★★★★★ 5
Great Beginner Coffee Scale
I have owned this scale for several months now and have had no complains. It is quick to read when adding beans. I have really enjoyed having the built in stopwatch. Some reviews say they would rather have a timer, but I really haven't felt the need for one. I have found that it is accurate with .3-.5 grams which is entirely reasonable for the price and for my use, pour over. In case it wasn't obvious, I would not recommend this for pulling shots of espresso as it is rather large and less accurate than you would want. I find it funny when people think they are going to get an ultra accurate, precise scale at this price point. If you want something accurate, you will have to pay more for it, but for the person who wants to step up their coffee game from using volumetric measurements, this is a great deal.
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Reviewed in the United States on February 2, 2021
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