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Description
HR31309J NSKHR31309J ISO 7FB ISO355 dimension series approx. d 45 mm Bore diameter D 100 mm Outside diameter T 27. 25 mm Total width B 25 mm Width of inner ring C 18 mm Width of outer ring Cup r (min.) 1. 5 mm Chamfer dimension of outer ring (Cup) Cone r (min.) 2 mm Chamfer dimension of inner ring (Cone) Cr 118000 N Basic dynamic load rating C0r 109000 N Basic static load rating Grease 3400 min 1 Grease lubrication Oil (Oil bath) 4800 min 1 Oil bath lubrication a
| HR31309J |
| ISO | 7FB | ISO355 dimension series approx. |
| d | 45 | mm | Bore diameter |
| D | 100 | mm | Outside diameter |
| T | 27.25 | mm | Total width |
| B | 25 | mm | Width of inner ring |
| C | 18 | mm | Width of outer ring |
| Cup r (min.) | 1.5 | mm | Chamfer dimension of outer ring (Cup) |
| Cone r (min.) | 2 | mm | Chamfer dimension of inner ring (Cone) |
| Cr | 118000 | N | Basic dynamic load rating |
| C0r | 109000 | N | Basic static load rating |
| Grease | 3400 | min-1 | Grease lubrication |
| Oil (Oil-bath) | 4800 | min-1 | Oil-bath lubrication |
| a | 31.5 | mm | Effective load center |
| da (min.) | 61 | mm | Diameter of shaft abutment (min) |
| Db (min.) | 96 | mm | Diameter of housing abutment |
| Da (min.) | 79 | mm | Diameter of housing abutment |
| Da (max.) | 91 | mm | Diameter of housing abutment |
| Sa | 3 | mm | Minimum width of space required in housing on large side face |
| Sb | 9 | mm | Minimum width of space required in housing on small side face |
| db (max.) | 57 | mm | Diameter of shaft abutment |
| ra (max.) | 2 | mm | Radius of shaft or housing fillet of inner ring |
| ra (max.) | 1.5 | mm | Radius of shaft or housing fillet of outer ring |
| e | 0.83 | Constant | |
| Y0 | 0.4 | Axial load Factors | |
| Y1 | 0.73 | Axial load Factors |
| Mass approx. | 0.947 | kg | Mass approx. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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
4.1 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Perfect overall watch
Color: Blue on Stainless Steel
Excellent watch overall
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 22, 2025
★★★★★ 1
Quality is not good like already wore. Missing warranty card
Color: Green on Brown Leather
Worst quality the tag is broken and the warranty card not there and no user manual box is also not that good. It came like someone used it and sell the watch
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Swiss Made Automatic Titanium Dive Watch for around 1K
Color: Black on Titanium, Color: Black on Titanium
Solidly built, movement is quite accurate. Dial, power reserve and “adjust on the fly” style clasp are highlights. Owned for 2 years now. Mido is owned by Swatch group so obtaining service is easy in most countries.
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Reviewed in the United States on September 28, 2024
★★★★★ 5
Two thumbs up
Fit Type: 9" Inseam, Size: XX-Large, Color: Rust
Great shorts. Comfortable. Size as expected. Holding up well.
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Reviewed in the United States on June 1, 2026
★★★★★ 4
Buen producto
Buen producto
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Reviewed in the United States on May 29, 2026