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- USA
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
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Description
R & D Flexible Shaft Coupling f/5" B/W, Hurth - 8HP/100RPM CapacityFlexible Shaft Coupling for 5" B W, Hurth 8HP 100RPM Capacity The R&D Flexible Couplings are fabricated from a contoured flexible disc molded in tough yet resilient new type polyurethane. The contoured disc gives clearance for the bolt heads, and is able to flex freely to take up any temporary misalignment of the engine and shaft, due to flexing of the boat structure or the engine moving on its rubber vibration isolation mountings. Forward thrust is
Flexible Shaft Coupling for 5" B/W, Hurth - 8HP/100RPM CapacityThe R&D Flexible Couplings are fabricated from a contoured flexible disc molded in tough yet resilient new type polyurethane. The contoured disc gives clearance for the bolt heads, and is able to flex freely to take up any temporary misalignment of the engine and shaft, due to flexing of the boat structure or the engine moving on its rubber vibration isolation mountings. Forward thrust is taken in compression on the disc between the two half couplings and reverse thrust is taken again in compression on the disc between the two fail straps. In the unlikely event of a disc failure the steel straps make the coupling fail safe and ensure drive is maintained in both forward and reverse.
To calculate power of coupling required:
Horse Power of Engine x Reduction Ratio x 100 = HP/100RPM
Engine Speed
Example:
Ford 150 HP at 2500 RPM with Borg Warner Velvet Drive 72C 2:1 Reduction Ratio
Engine Horse Power is 150 HP, Max Rated RPM is 2500, Reduction Ratio is 2:1
150/2500 X 2 x 100 = 12hp per 100RPM
Coupling required is 910-009
The R & D Marine Flexible Coupling fits between the transmission output flange and shaft coupling. It is designed to protect a boat's drivetrain. The unit will reduce vibration, compensate for some misalignment, isolate the shaft and absorb shock loads.
The flexible disc is machined from a resilient and durable polyurethane. It allows the unit to flex, absorbing vibrations and temporary misalignment of the shaft and engine due to movement of the engine or flexing in the =vessel's structure.
The polyurethane disc is backed up by two metal compression straps, one on either side of the flexible coupling. These metal straps hold the system in constant compression whether the drivetrain is in forward or reverse. This feature extends the life of the system dramatically.
The R & D Marine Flexible Coupling will also absorb shockloads resulting from gear changes, or the propeller striking a submerged object. The polyurethane disk will distort with light shock loads and is designed to be sacrificial in the event of severe shock load, saving on expensive drivetrain repairs. If the disc is destroyed from massive shockload the metal compression straps keep the coupling intact ensuring that the drive system is functional in both forward and reverse.
Why R&D Marine Flexible Shaft Couplings?
- Polyurethane flange creates a flexible barrier to reduce drivetrain noise and vibration to quiet your drivetrain
- Absorbs transmission shock load caused by the propeller and high speed gear changes. This helps to reduce and avoid costly transmission damage
- Fail safe design, both forward and reverse thrust is taken in compression from the steel straps, giving a durable design even in extreme conditions
Manufacturer : R & D Marine
Manufacturer Part No : 910-044
UPC : 839662004114
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 ★★★★★
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Product Reviews
★★★★★ 4
Works well to protect face
Color: Classic
Works well to protect face from sun and is not too oily. However, it needs more of tint to it and is too white.
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Reviewed in the United States on February 27, 2025
★★★★★ 5
I have been looking for this cream all my life. and found it.
Color: Classic
Very convenient packaging (I do not need a dispenser) it can withstand a long time in the sun, is almost not washed off by sea water, the skin is soft even after a shower, the consumption is economical as it is applied with a fairly light layer. Worked out every dollar 👌🏽Love it!!
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Reviewed in the United States on September 15, 2021
★★★★★ 1
Doesn't work, got burnt
Color: Classic
This is very tinted, stains what it touches. I reapplied 3 times throughout a 3 hour span while at a beach in Florida and got burnt, particularly around swimsuit straps (despite being extra careful to get under the straps). It goes on pretty smoothly and eventually clear but would not recommend due to lack of sun protection.
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Reviewed in the United States on May 25, 2026
★★★★★ 2
Not as great as I hoped
Color: Classic, Color: Classic
Bought because of high praise from esthetician on social media. Overall, not worth the price.
Pros-
Did work as a sunscreen.
Had no reaction or breakouts from it.
Socially conscious brand/product.
Cons-
-Very thick and paste like. Hard to spread around dry areas. I would prefer a lighter formula.
-Even though it is tinted (got the classic) and I am pale skinned this made me look washed out. Wore it in my face one day and people kept asking me if I was "feeling okay".
- When I wore it on my body it would get tinted sunscreen on my clothes and was very difficult to get the color out. I wear sunscreen all year around in any weather and I would only recommend this if you are going to the beach/pool so you don't get stains on nicer clothes.
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Reviewed in the United States on July 25, 2023
★★★★★ 5
Great texture, spreads easily, matte finish. Beautiful!
Color: Classic
Love this sunscreen! It glides over the skin, doesn't leave a white cast even on my brown skin, and it stays put. I love the texture. It's similar to paula's choice resist mineral sunscreen but a higher spf. I use it on my face too.
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Reviewed in the United States on June 24, 2021