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- USA
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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For Your Every Summer RSVP, with Code: SUMMER15
Description
NU321 WC3 NSKN321W d 105 mm Bore diameter D 225 mm Outside diameter B 49 mm Width EW 195 mm Raceway diameter of outer ring r (min.) 3 mm Chamfer dimension r1 (min.) 3 mm Chamfer dimension Cr 420000 N Basic dynamic load rating C0r 390000 N Basic static load rating Thermal Speed Rating (Oil bath) 3800 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Grease 2200 min 1 Grease lubrication Oil (Oil bath) 2600 min 1 Oil bath lubrication da (min.)
| N321W |
| d | 105 | mm | Bore diameter |
| D | 225 | mm | Outside diameter |
| B | 49 | mm | Width |
| EW | 195 | mm | Raceway diameter of outer ring |
| r (min.) | 3 | mm | Chamfer dimension |
| r1 (min.) | 3 | mm | Chamfer dimension |
| Cr | 420000 | N | Basic dynamic load rating |
| C0r | 390000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 3800 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Grease | 2200 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 2600 | min-1 | Oil-bath lubrication |
| da (min.) | 118 | mm | Diameter of shaft abutment (min) |
| Db (min.) | 200 | mm | Diameter of housing abutment |
| rb (max.) | 2.5 | mm | Radius of shaft or housing fillet |
| Db (max.) | 212 | mm | Diameter of housing abutment |
| ra (max.) | 2.5 | mm | Radius of shaft or housing fillet |
| Mass approx. | 8.7 | kg | Mass approx. |
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
4.3 ★★★★★
Based on 1781 reviews
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Product Reviews
★★★★★ 5
great water shoe!
Size: 7 Women/6 Men, Color: 3f-410 Rose Red
I absolutely loved these water shoes! They are surprisingly very comfortable and slip resistant. The sole is very thick and the material is pretty quick to dry. I purchased them for my cruise port excursions and wore them dry, in the water, and walked around after being in the water—no blisters or uncomfortable rubbing. I would say they are maybe a little on the larger side for women. I can range anywhere from a 7, 7.5 to an 8. I purchased a size women’s 7/men’s 6 and it was perfect. I am excited to wear these at the beach and in the creek this summer!
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Great Find
Size: 8, Color: Blue
Cute, comfortable, colorful have soft straps. I was very surprised by the both the quality and comfort of these Flip Flops. The price is so affordable that I bought several pairs in other colors. They are light weight, have ample arch support, fit true to size and can be worn with jeans, short or a casual dress. They really do look just as good as any of the high-priced brands.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Overall, these are some of the most comfortable flip flops I have owned, and would buy again.
Size: 6.5, Color: White Khaki
I was so happy with these KuaiLu Flip Flops that I bought two more pair, one in black and one in brown! They were comfortable right out of the box and did not need any break-in time. The arch support is excellent and gives my feet much better support than regular flip flops. They are also light weight, well made, and cute enough to wear with many different outfits. The soles have good traction, and they feel sturdy when walking.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Nice Flip Flops for the Price!
Size: 7.5, Color: White Khaki, Size: 7.5, Color: White Khaki
I just received my flip flops and tried them on, and they have a nice cushiony feel to them. The white color matches many of my outfits great. And while the fit is generally good, they could be a bit wider as I have wide feet. But they still feel comfortable.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
runs big
Size: 7.5, Color: Camel
I am always a size 8 in boots, sandals, sneakers and read these ran large so ordered a size 7.5. They are still too big on me. I sent back for a 7 and I will update when I get those. They are very, very cute and comfortable! I love the cloth that goes over the foot!! That makes them seem a bit more fancy than regular flip flops. They also do sound like regular flip flops, so if you want a quiet sandal these are not for you. They are very cushioned and I can def feel the arch support. You will need to size down at least half size and maybe one whole size. The hardest thing for me was to pick a color! May have to get several pair! Just ordered my mom the dark blue and I know she will love them!!! Highly recommend, especially for the low price!
Update: Got the 7 and are still too big. As I said, I got my mom the 6 so I tried them on and they are still a tad too big on me!!! BTW the sizes 8,7.5,7 and the 6 I can hardly see any difference whatsoever! They don't come in 5 1/2 so I am sending the 7 back for a 6 and keeping those just because they are so darn cute and comfortable! I also don't have a very thick foot so I wish the straps were a tad tighter, but I will deal with it. So, to sum up: Be sure to size down at least one size and maybe even two. Returns are easy, so maybe try a few different sizes! I haven't worn a size 6 since I was in about the 6th grade, so not sure what is going on with the sizing. Oh yeah, I did get three different colors and the sizing was the same with all three. HTH! Good luck!
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Reviewed in the United States on March 26, 2026
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