Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
nu228 emc3 nskNU228EM d 140 mm Bore diameter D 250 mm Outside diameter B 42 mm Width FW 169 mm Raceway diameter of inner ring r (min.) 3 mm Chamfer dimension r1 (min.) 3 mm Chamfer dimension Cr 485000 N Basic dynamic load rating C0r 515000 N Basic static load rating Thermal Speed Rating (Oil bath) 3200 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Mechanical (forced circulation oil) 4500 min 1 Properly designed and controlled forced
| NU228EM |
| d | 140 | mm | Bore diameter |
| D | 250 | mm | Outside diameter |
| B | 42 | mm | Width |
| FW | 169 | mm | Raceway diameter of inner ring |
| r (min.) | 3 | mm | Chamfer dimension |
| r1 (min.) | 3 | mm | Chamfer dimension |
| Cr | 485000 | N | Basic dynamic load rating |
| C0r | 515000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 3200 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Mechanical (forced-circulation oil) | 4500 | min-1 | Properly designed and controlled forced-circulation oil lubrication |
| Grease | 2400 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 3000 | min-1 | Oil-bath lubrication |
| da (min.) | 153 | mm | Diameter of shaft abutment (min) |
| db (min.) | 153 | mm | Diameter of shaft / spacer sleeve abutment |
| db (max.) | 165 | mm | Diameter of shaft / spacer sleeve abutment |
| dc (min.) | 171 | mm | Diameter of shaft abutment |
| dd (min.) | 182 | mm | Diameter of shaft abutment |
| Da (max.) | 237 | mm | Diameter of housing abutment |
| rb (max.) | 2.5 | mm | Radius of shaft or housing fillet |
| ra (max.) | 2.5 | mm | Radius of shaft or housing fillet |
| Mass approx. | 9.21 | 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
4.7 ★★★★★
Based on 404 reviews
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Product Reviews
★★★★★ 5
Very comfortable
Color: Black
Very sturdy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
Love this chair!!!
Color: Beige
This chair is soooo comfy and looks fabulous!!! It fits under my L-shaped desk perfectly even when I work in the corner section! It was super easy to put together as well!!!
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Love the design, comfort and ease
Color: Grey, Color: Grey
Assembly was a breeze with the Amazon Basics Ergonomic Executive Office Desk Chair. The instructions were clear and easy to follow, and I had the chair put together quickly without any hassle. This simple setup made the whole experience even more satisfying from the start.
In terms of comfort, the chair truly delivers. It provides excellent lumbar support, I assume it will make long hours at my desk much more enjoyable. The adjustable height feature lets me customize my seating position, and the flip-up armrests allow me to slide the chair neatly under my desk without worrying about damage.
Overall, I couldn’t be happier with my purchase. The chair looks stunning in my office and perfectly complements the decor. It combines style, comfort, and practicality at a fantastic value, and I highly recommend it to anyone looking to upgrade their office chair. I love you so much that I ordered another one for my husband’s desk.
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Reviewed in the United States on November 24, 2025
★★★★★ 5
Very comfortable
Color: Grey
I’m not sure if I am just transitioning from a very uncomfortable office chair, but this one is extremely comfortable. Very good dynamic lumbar support that reminds you that it’s there. Only cons would be a low back (I am 6’5”) but I’m not laying my head back anyways. Also the seat length is a touch short for me but standard size really. Great bang for buck with an open box deal. Easy to assemble. TBD on durability.
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Reviewed in the United States on June 10, 2026
★★★★★ 5
BUY this chair!!!!!
Color: Cream
After using this chair for about a month, I can confidently say that it's one of the most comfortable office chairs I've sat in for an extended period of time. Being in school and studying 8+ hours a day at my desk would normally make my back hurt in any other chair. Fortunately, after using this chair all day I have very very minimal back pain, if any at all (definitely due to previous injuries). The cushion on the back of the chair is extremely supportive and comfortable over all. Cannot say enough good things about this chair!!!! Definitely worth the price and easy to put together.
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Reviewed in the United States on May 31, 2026
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