Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
53210 U NSK53210U d 50 mm Bore diameter D 78 mm Outside diameter T,T3 23. 5 mm Height T4 26 mm Height bearing include seat washer r (min.) 1 mm Chamfer dimension Ca 49000 N Basic dynamic load rating C0a 111000 N Basic static load rating Grease 2400 min 1 Grease lubrication Oil (Oil bath) 3600 min 1 Oil bath lubrication A 32. 5 mm Centre height housing washer sphere R 64 mm Radius sphered housing washer b 7. 5 mm Height sphered housing washer D2 62 mm Inner
| 53210U |
| d | 50 | mm | Bore diameter |
| D | 78 | mm | Outside diameter |
| T,T3 | 23.5 | mm | Height |
| T4 | 26 | mm | Height bearing include seat washer |
| r (min.) | 1 | mm | Chamfer dimension |
| Ca | 49000 | N | Basic dynamic load rating |
| C0a | 111000 | N | Basic static load rating |
| Grease | 2400 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 3600 | min-1 | Oil-bath lubrication |
| A | 32.5 | mm | Centre height housing washer sphere |
| R | 64 | mm | Radius sphered housing washer |
| b | 7.5 | mm | Height sphered housing washer |
| D2 | 62 | mm | Inner diameter sphered seat washer |
| d1 | 78 | mm | Outside diameter shaft washer |
| D3 | 82 | mm | Outside diameter sphered housing washer |
| D1 | 52 | mm | Inner diameter housing washer |
| da (min.) | 67 | mm | Diameter of shaft abutment (min) |
| Da (max.) | 61 | mm | Diameter of housing abutment |
| ra (max.) | 1 | mm | Radius of shaft or housing fillet |
| Mass approx. | 0.504 | 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
4.2 ★★★★★
Based on 1938 reviews
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Product Reviews
★★★★★ 5
Comfortable folding mattress
Color: Grey, Size: Twin
Thickness is great, very comfortable. Adult grandson uses it when he sleeps over. Would recommend it.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
More Comfortable than an Airbed
Color: light gray, Size: cot
I purchased this 4-inch foam floor mattress for when grandchildren stay over. This is my 2nd one, since zi have 2 grandchildren. I don't have room for beds or bunk beds, but I have a space where I can store these. I slept on it myself several nights in a row when I had company and I found it to be much better than sleeping on an air bed. I purchased mattress covers and fitted sheets that fit the exact dimensions of the mattress and I am happy to be able to provide a perfect sleeping setup for my 2 grandchildren! If you have a place to store the mattress when it's folded (25 inches high, 31 inches wide, 12 inches deep) I recommend a 4-inch thick foam floor mattress over an air bed. In my home it is the perfect solution! Follow all the directions for allowing the mattress to reach its full thickness. It is vacuum packed and needs several hours (almost 2 days) to expand.
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Reviewed in the United States on January 17, 2026
★★★★★ 1
Blow up beds are better
Color: Grey, Size: Queen
Blow up beds are better. These are barely thicker than a sleeping bag.
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Reviewed in the United States on December 9, 2025
★★★★★ 5
Comfortable
Color: Grey, Size: Single
Wife uses it every day and loves it.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Cómodo
Color: Grey, Size: Single
Versatil y cómodo, me gusta que trae su bolsa para guardar.
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Reviewed in the United States on April 29, 2026