Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Couplings
Origin	-
Material	High-Grade Nitrile Rubber and Steel
Available Sizes	3J, 4J, 5J, 6J, 7J, 8J, 9J, 10J, 11J, 12J, 13J, 14J
Application	Industrial Machinery, Pumps, Compressors
Temperature Range	-40°C to +100°C
Hardness	Shore A 90 ± 5
Torque Capacity	Varies by size (See specification chart)
Misalignment Tolerance	Angular and Parallel misalignment compensation
Color	Black
Package Content	1 x Rubber Spider Element
Origin	Manufactured in ISO 9001 Certified Facility

6 reviews

Anonymous

Mar 29, 2026

Rating: 4/5

Good value, fast shipping

Needed a replacement for an old compressor. The 8J element arrived quickly and works well. Took off one star only because the packaging was a bit loose, but the part itself is undamaged and functional.

Anonymous

Mar 26, 2026

Rating: 5/5

Excellent durability

We use these in a high-vibration environment. The 12J couplings have lasted three times longer than the previous brand we were using. Highly recommend for heavy-duty applications.

Anonymous

Mar 22, 2026

Rating: 4/5

Solid replacement part

Works great for our conveyor system. The 9J size was hard to find locally, so this was a lifesaver. Installation was straightforward.

Anonymous

Mar 21, 2026

Rating: 5/5

Great for maintenance stock

Purchased a variety pack of sizes from 4J to 14J for our maintenance closet. All pieces look uniform and well-molded. Good price point for bulk buying.

Anonymous

Mar 14, 2026

Rating: 5/5

Perfect fit for our pump

Ordered the 10J size for a water pump repair. The rubber quality feels durable and it fit the coupling jaws perfectly without any forcing. Vibration has been significantly reduced since installation.

Anonymous

Mar 08, 2026

Rating: 5/5

Exactly as described

Bought the 6J size. Dimensions matched the OEM specifications perfectly. Easy to install and the rubber seems very resistant to oil and wear.

5 FAQ

Q: Can I use the 11J element in a 10J coupling?

A: No, the sizes are not interchangeable. Using the wrong size can lead to improper fit, excessive vibration, and premature failure of both the rubber element and the metal hubs.

Q: Does this coupling element resist hydraulic oil?

A: Yes, our standard Nitrile Rubber elements offer good resistance to hydraulic oils, grease, and fuels. For extreme chemical exposure, please contact us for specialized material options.

Q: What is the maximum RPM for the 14J size?

A: The maximum RPM depends on the specific bore size and balance grade of the metal hubs you are using. Generally, these rubber elements support speeds up to 3000 RPM when paired with correctly balanced hubs.

Q: How do I determine which J-size I need?

A: The size (e.g., 10J) corresponds to the specific jaw coupling hub series. Please measure the outer diameter and the number of jaws on your existing metal hubs, or consult your machine's manual for the required spider size.

Q: Do you sell the metal hubs as well?

A: Currently, this listing is for the rubber spider elements only. We do have separate listings for the steel hubs; please search our store by the specific J-size you require.

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