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Description
R & D Flexible Shaft Coupling f/6" Twin Disc - 28HP/100RPM CapacityFlexible Shaft Coupling for 6" Twin Disc 28HP 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 6" Twin Disc - 28HP/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 : 910-026
UPC : 839662003957
Shipping Notes
- Free Standard Shipping on $100+ Orders 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
4.6 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Great Office Chair
I purchased this chair to replace the old one in my son's room. I really like the look and style of this chair. It was easy for me to assemble and the riser functions really good and the stability of the base is very good. I like the wide design as it has more back support and seat support.
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Reviewed in the United States on January 23, 2026
★★★★★ 5
Comfortable, Stylish, and Great for Casual Seating
The OLIXIS Criss Cross Legged Chair is a really nice option if you prefer sitting cross-legged or want a wider, more relaxed seating style compared to a traditional office chair. The armless design and wide seat make it easy to shift positions throughout the day without feeling restricted.
Comfort-wise, the padding is decent and supportive for short to moderate sitting sessions. The adjustable height and swivel function work smoothly, and it’s easy to find a comfortable position whether you’re working at a desk, doing makeup, or just using it casually in a bedroom or home office setup.
The minimalist look is also a plus—it blends well with modern decor and doesn’t take up as much visual space as bulky office chairs. Assembly was fairly straightforward and didn’t take long.
One thing to note is that since it has no wheels, it’s not ideal if you need to move around your workspace frequently. Also, while it’s comfortable, it may not be the best choice for long, full workdays compared to a high-back ergonomic chair with more lumbar support.
Overall, this is a stylish and functional chair that works great for light office use, studying, or casual seating—especially if you like the criss-cross sitting position.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Perfect “Hair-Doing” Command Chair
Color: Leather-beige, Size: Luxurious(With Wheels), Color: Leather-beige, Size: Luxurious(With Wheels)
As a physician, mom, and military officer, my mornings already feel like a tactical operation: breakfast, cartoons, and hair time before we roll out. My old high‑back desk chair turned every ponytail into a wrestling match with the chair back. This low‑back, armless chair has officially become my hair‑doing command center.
What I love:
• Low back + no arms = easy kid access.
My daughter sits facing the desk, snuggled in her blanket, eating breakfast and watching TV. I can stand right behind her and actually reach her hair without a chair back or armrests blocking my elbows. No more asking her to twist sideways and slowly slide off the chair while I chase her head.
• Wide, comfy seat for both of us.
The seat is generous and supportive with thick cushions. I have plenty of room and my daughter is perfectly comfortable for our whole morning routine. She’s happy, I’m not bent at weird angles, and the whole process is smoother (and quieter!).
• Looks and feels more expensive than it is.
The faux leather upholstery is gorgeous in person and feels soft and substantial, not flimsy. It blends right in with our bedroom furniture and doesn’t scream “office chair.”
• Thoughtful packaging & painless assembly.
Everything arrived in perfect condition, very well protected in the box. The instructions were clear, all hardware was labeled, and it took me under 10 minutes to assemble by myself.
• Glides & adjusts smoothly.
The chair rolls, swivels, and raises/lowers easily and quietly. No squeaks, no sticking. I can move her closer to the desk or spin her toward me with one hand while holding a hairbrush in the other.
A quick heads‑up:
The chair is on the larger side (which I personally love), so if you’re looking for a tiny, petite chair, check the measurements. For me, the extra space is exactly what I wanted.
Bottom line:
If you also use your bedroom desk as a hair‑doing station, homework hub, or breakfast bar, this chair is a game‑changer. Comfortable, stylish, easy to assemble, and priced competitively with similar chairs—while actually making our chaotic mornings run a little smoother.
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Reviewed in the United States on December 10, 2025
★★★★★ 5
The perfect desk chair for sitting cross-legged—plus it rolls!
Color: Leather-beige, Size: Luxurious(With Wheels), Color: Leather-beige, Size: Luxurious(With Wheels)
This chair is absolutely amazing if you like to sit cross-legged while working. The seat is incredibly wide, giving you plenty of room to get comfortable without feeling cramped against the armrests. The smooth faux leather is awesome. I am honestly impressed with the price vs quality. The padding is nice for my 13 yr old daughter to sit cross legged on. The cushion is thick and supportive, and it has held its shape really well without flattening out. I also love that this specific model has wheels—a lot of these wide cross-legged chairs come with flat bases, so having the mobility to roll around my desk space is a huge plus. It looks high-end, feels sturdy, and was very straightforward to assemble. 10/10 recommend!
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Great value and chair!
Color: Fabric-grey, Size: Luxurious(With Wheels)
Great chair and value! I got this to use with my work desk. It’s not super padded and I don’t know how long it will last, but it’s comfortable and the height is adjustable. It feels solid and my teenager was able to put it together with the instructions. It looks nicer with my desk than I thought it would. The fact I can sit “cross cross apple sauce” was the most important feature!
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Reviewed in the United States on April 25, 2026