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Description
21311 eake4 nsk21311EAKE4 d 55 mm Bore diameter D 120 mm Outside diameter B 29 mm Width r (min.) 2 mm Chamfer dimension Cr 178000 N Basic dynamic load rating C0r 174000 N Basic static load rating Thermal Speed Rating (Oil bath) 5300 min 1 Oil bath lubrication subject to conditions outlined in ISO 15312 Mechanical (forced circulation oil) 8000 min 1 Properly designed and controlled forced circulation oil lubrication Grease 4500 min 1 Grease lubrication Oil (Oil bath)
| 21311EAKE4 |
| d | 55 | mm | Bore diameter |
| D | 120 | mm | Outside diameter |
| B | 29 | mm | Width |
| r (min.) | 2 | mm | Chamfer dimension |
| Cr | 178000 | N | Basic dynamic load rating |
| C0r | 174000 | N | Basic static load rating |
| Thermal Speed Rating (Oil-bath) | 5300 | min-1 | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Mechanical (forced-circulation oil) | 8000 | 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.) | 65 | mm | Diameter of shaft abutment (min) |
| da (max.) | 72 | mm | Diameter of shaft abutment |
| Da (min.) | 98 | mm | Diameter of housing abutment |
| Da (max.) | 110 | mm | Diameter of housing abutment |
| ra (max.) | 2 | mm | Radius of shaft or housing fillet |
| e | 0.23 | Constant | |
| Y2 | 4.4 | Axial load Factors | |
| Y3 | 3 | Axial load Factors | |
| Y0 | 2.9 | Axial load Factors |
| Mass approx. | 1.58 | kg | Mass approx. |
| Adapter | H311X | Adapter | |
| Withdrawal sleeve | AHX311 | Withdrawal sleeve |
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
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Exceeded expectations
Style: Receiver
We have 2 tower speakers, 4 ceiling speakers, a center speaker, and two subwoofers and, wow, the sound is amazing. The key is the microphone which is used to set the relative volume and delay time for each speaker. Comes with media app which allows access to my audio files on my network storage device and lots of streaming apps. Kudos to Yamaha.
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Reviewed in the United States on February 1, 2026
★★★★★ 5
Works smoothly with Alexa and sounds great
Style: Receiver
I love Yamaha and MusicCast!
The 2nd zone feature is fantastic too
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Reviewed in the United States on April 30, 2025
★★★★★ 5
1 yr review of buying a used RX-V6A
Style: Receiver
GOAT amplifier for a 7.2CH amp for such good price!
Got it for even cheaper because I bought it used. Apparently was a demo unit at an expo.
The amp is notorious for blowing up the HDMI passthrough chip but it did not happen to me. It supports HDMI 2.1 with ease!
Very sharp and sophisticated amp with not a lot of buttons. Most of it can be controlled by a remote or with an app, which is easy to setup. If not, follow the manual.
Decent power too. 100W/channel. Enough to drive my Klipsch bi-amping Dolby Atmos Speakers. Drives them with ease.
This is a 1 yr review. And despite owning a used product, which was on an expo (assuming it was used heavily), the amp is running strong after much usage even a year later. Has all it's functionality intact.
Best 7.2 CH amp ever. Yamaha YPAO really makes the effort of speaker tuning easy too.
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Reviewed in the United States on March 4, 2025
★★★★★ 5
Nice receiver at a great price
Style: Receiver
Receiver works perfectly. I just wish the documentation was better.
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Reviewed in the United States on April 14, 2025
★★★★★ 5
RX-V6A
Style: Receiver
The biggest problem I have found is the tiny screen. Otherwise it is a solid AV receiver for any small to medium sized room.
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Reviewed in the United States on October 9, 2023