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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
nup311 et nskNUP311ET d 55 mm Bore diameter D 120 mm Outside diameter B 29 mm Width FW 70. 5 mm Raceway diameter of inner ring r (min.) 2 mm Chamfer dimension r1 (min.) 2 mm Chamfer dimension Cr 169000 N Basic dynamic load rating C0r 143000 N Basic static load rating Thermal Speed Rating (Oil bath) 6000 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Mechanical (forced circulation oil) 7500 min 1 Properly designed and controlled forced
| NUP311ET |
| d | 55 | mm | Bore diameter |
| D | 120 | mm | Outside diameter |
| B | 29 | mm | Width |
| FW | 70.5 | mm | Raceway diameter of inner ring |
| r (min.) | 2 | mm | Chamfer dimension |
| r1 (min.) | 2 | mm | Chamfer dimension |
| Cr | 169000 | N | Basic dynamic load rating |
| C0r | 143000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 6000 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Mechanical (forced-circulation oil) | 7500 | min-1 | Properly designed and controlled forced-circulation oil lubrication |
| Grease | 4500 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 5600 | min-1 | Oil-bath lubrication |
| da (min.) | 64 | mm | Diameter of shaft abutment (min) |
| db (min.) | 64 | mm | Diameter of shaft / spacer sleeve abutment |
| db (max.) | 68 | mm | Diameter of shaft / spacer sleeve abutment |
| dc (min.) | 72 | mm | Diameter of shaft abutment |
| dd (min.) | 80 | mm | Diameter of shaft abutment |
| Da (max.) | 111 | mm | Diameter of housing abutment |
| rb (max.) | 2 | mm | Radius of shaft or housing fillet |
| ra (max.) | 2 | mm | Radius of shaft or housing fillet |
| Mass approx. | 1.5 | kg | Mass approx. |
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4.6 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Easy to read the time.
Beautiful.
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Reviewed in the United States on October 10, 2025
★★★★★ 5
Wife loves it
Makes a great gift
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Reviewed in the United States on June 14, 2025
★★★★★ 5
Keeps great time
This is actually prettier than I thought it would be and I am tough on everything I wear. Never know what the day will entail, so when I clean it at the end of the day, it’s pretty shine comes right back.
I’m pleased with it.
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Reviewed in the United States on May 19, 2024
★★★★★ 3
Very hard to see the HANDS, but pretty
Very pretty and I didn't have to remove links. Hard to see the hands unless you angle it in the light. I'm not sure if I'll keep it. I'll give it some time ..lol and see how it goes before Amazon's 30 day policy.
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Reviewed in the United States on July 12, 2025
★★★★★ 3
just makes it around my large wrist - but very pretty
If you also have a large wrist like I do, well ... try it out. Bought it to look delicate and pretty at my son's wedding, to match color of gown. Which it does.
Side note: the hands are cobalt blue, for some reason! But you'd have to look up close to discover that. It doesn't take away from the overall look I wanted.
Edit: !@#$@! - it BROKE halfway through the wedding! During the dancing, I discovered it on the floor.
Downgrading this to one star, of course.
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Reviewed in the United States on July 8, 2023