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- USA
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
21317 EAE4 NSK21317EAE4 d 85 mm Bore diameter D 180 mm Outside diameter B 41 mm Width r (min.) 3 mm Chamfer dimension Cr 360000 N Basic dynamic load rating C0r 395000 N Basic static load rating Thermal Speed Rating (Oil bath) 3800 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Mechanical (forced circulation oil) 5000 min 1 Properly designed and controlled forced circulation oil lubrication Grease 3000 min 1 Grease lubrication Oil (Oil bath)
| 21317EAE4 |
| d | 85 | mm | Bore diameter |
| D | 180 | mm | Outside diameter |
| B | 41 | mm | Width |
| r (min.) | 3 | mm | Chamfer dimension |
| Cr | 360000 | N | Basic dynamic load rating |
| C0r | 395000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 3800 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Mechanical (forced-circulation oil) | 5000 | min-1 | Properly designed and controlled forced-circulation oil lubrication |
| Grease | 3000 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 4000 | min-1 | Oil-bath lubrication |
| da (min.) | 99 | mm | Diameter of shaft abutment (min) |
| da (max.) | 108 | mm | Diameter of shaft abutment |
| Da (min.) | 142 | mm | Diameter of housing abutment |
| Da (max.) | 166 | mm | Diameter of housing abutment |
| ra (max.) | 2.5 | mm | Radius of shaft or housing fillet |
| e | 0.24 | Constant | |
| Y2 | 4.3 | Axial load Factors | |
| Y3 | 2.9 | Axial load Factors | |
| Y0 | 2.8 | Axial load Factors |
| Mass approx. | 5.2 | 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
4.4 ★★★★★
Based on 2106 reviews
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Product Reviews
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool.
They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me.
They are comfortable to wear, washed and dried easily.
The material has some stretch to it, but not a lot.
Well made, no stray strings. Perfect fit for me.
Just what I was looking for.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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Reviewed in the United States on January 31, 2026
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
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Reviewed in the United States on August 29, 2025
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026