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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
NUP312 ET NSKNUP312ET d 60 mm Bore diameter D 130 mm Outside diameter B 31 mm Width FW 77 mm Raceway diameter of inner ring r (min.) 2. 1 mm Chamfer dimension r1 (min.) 2. 1 mm Chamfer dimension Cr 184000 N Basic dynamic load rating C0r 157000 N Basic static load rating Thermal Speed Rating (Oil bath) 5600 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Mechanical (forced circulation oil) 6700 min 1 Properly designed and controlled forced
| NUP312ET |
| d | 60 | mm | Bore diameter |
| D | 130 | mm | Outside diameter |
| B | 31 | mm | Width |
| FW | 77 | mm | Raceway diameter of inner ring |
| r (min.) | 2.1 | mm | Chamfer dimension |
| r1 (min.) | 2.1 | mm | Chamfer dimension |
| Cr | 184000 | N | Basic dynamic load rating |
| C0r | 157000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 5600 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Mechanical (forced-circulation oil) | 6700 | min-1 | Properly designed and controlled forced-circulation oil lubrication |
| Grease | 4800 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 5600 | min-1 | Oil-bath lubrication |
| da (min.) | 71 | mm | Diameter of shaft abutment (min) |
| db (min.) | 71 | mm | Diameter of shaft / spacer sleeve abutment |
| db (max.) | 75 | mm | Diameter of shaft / spacer sleeve abutment |
| dc (min.) | 79 | mm | Diameter of shaft abutment |
| dd (min.) | 86 | mm | Diameter of shaft abutment |
| Da (max.) | 119 | 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. | 1.86 | kg | Mass approx. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
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4.7 ★★★★★
Based on 2309 reviews
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Product Reviews
★★★★★ 1
not cooling for post menopause
Set name: UltraCool Pillow, Standard - Medium/Firm Firmness, Item length width: 30.0 Inches
As a post menopausal person I did not find this cooling at all. The material is memory foam which holds heat but more importantly my head sinks in so that half of it is always surrounded by the pillow, trapping heat. It IS a supportive, soft and comfy pillow. For cooling though, I found it better to buy a firmer, thinner pillow which keeps my head from sinking into it, allowing heat to dissipate.
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Reviewed in the United States on August 25, 2025
★★★★★ 4
Nice and squishy
Set name: UltraCool Pillow, Standard - Soft/Medium Firmness, Item length width: 30.0 Inches
Not really a "cooling" pillow, but better than a standard or or fiber filled pillow. All these types of pillows and other bed linens are initially cool to the touch, but they quickly heat up to match your body temperature. Although the technology currently does not exist to maintain constant cooling, pillows like this are a good compromise for now. It's nice and soft and is a good value for the price.
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Reviewed in the United States on July 30, 2025
★★★★★ 5
New Fave
Set name: UltraCool Pillow, Standard - Medium/Firm Firmness, Item length width: 30.0 Inches
Love It so far... Its cool and comfortable... just the right firmness
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Reviewed in the United States on December 17, 2025
★★★★★ 3
Doesn’t stay cool long
Set name: UltraCool Pillow, Standard - Soft/Medium Firmness, Item length width: 30.0 Inches
The pillow was a little softer than I expected. It’s cool at first but at least for me heats up fast.
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Reviewed in the United States on May 11, 2024
★★★★★ 2
too soft, useless. but cool, kindah
Set name: UltraCool Pillow, Standard - Medium/Firm Firmness, Item length width: 30.0 Inches
the problem with these "cooling" pillows is any cooling effect is almost completely negated by a pillow case. this particular pillow is cool to the touch, but completely useless as it flattens out completely, way too soft I think for anyone. I would not recommend this "NASA" pillow for anyone for anything. Maybe for 10 bucks, but certainly not what they ask for this. I did keep it though. It is "cool" but only for a moment and your flipping it around like any other pillow. also way too soft. BUt, it has been cool enough to get me back to sleep.
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Reviewed in the United States on May 29, 2025