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- USA
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
For Your Every Summer RSVP, with Code: SUMMER15
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
4.7 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
A Very Nice Lightweight, but Warm Jacket
I was surprised at how light this jacket was when I took it out of the nice box it came in. Despite its light weight, it is still a very warm and cozy jacket.
The lining of the jacket is a soft fleece, which is very comfortable. It also allows for easy layering with sweaters and shirts. The lining is very warm and cozy; it's moisture-wicking, as well, which will keep you nice and dry.
The outer shell of the jacket is perfect to keep that cold wind out! It also helps with the sun, with a UV protection rating of 30+. It seems very durable, but it is not bulky at all. In fact, the whole jacket stretches a bit for even more comfort and a good fit.
Whatever climate you live in, this jacket will provide you warmth and comfort without bulking you up like the Hulk. it's a great little jacket to keep in the car or at the office.
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Reviewed in the United States on October 13, 2025
★★★★★ 5
Golf vest
Color: Black, Size: XX-Large
Very comfortable! Well made! Looks good and great price! Wish it had pockets but other than that great
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Great Vest
this golf vest is amazing. It’s very well-made. It fits well, I’m a double X and I’m 62 and a slice of pizza from 230 pounds. I just love it and plan to buy more. I believe it’s gonna wear very well, but I’ll let you all know in a month or two after I’ve worn it a couple times and washed it a couple times.
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Reviewed in the United States on March 24, 2026
★★★★★ 4
As Advertised!
Product arrived promptly & well-packaged (shrink wrapped packaged & enclosed inside additional box). Golf vest was received "as advertised" & appears to be of good quality. Vest was fairly priced & is very comfy, lightweight, stylish & wrinkle resistant. Purchased as a gift for my adult son for his future golf adventures. Size/fit will need to be determined by my son when he prepares for his next golf outing. Very pleased with my purchase & will consider additional purchases from seller in the future.
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Reviewed in the United States on December 29, 2025
★★★★★ 5
Hold vest
Color: Red, Size: 3X-Large
Great look & fit !
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Reviewed in the United States on March 1, 2026