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NJ309
Cylindrical Roller Bearing
NJ309
Cylindrical Roller Bearing
A robust single-row bearing for heavy industrial machinery, capable of handling significant radial and unidirectional axial loads. [Cylindrical Roller Bearings](https://www.nachi-bearings.de/media/crb_dimensions_web.pdf)
Price Match Promise
Found it cheaper elsewhere? We’ll match any UK competitor’s price on bearings in stock — call us before you buy.
Need pricing for this part?
This bearing is priced on application. Our team will get back to you with competitive pricing within 24 hours, no obligation.
A robust single-row bearing for heavy industrial machinery, capable of handling significant radial and unidirectional axial loads. [Cylindrical Roller Bearings](https://www.nachi-bearings.de/media/crb_dimensions_web.pdf)
Price Match Promise
Found it cheaper elsewhere? We’ll match any UK competitor’s price on bearings in stock — call us before you buy.
Technical Dimensions & Load Ratings
Confirm these values match your shaft, housing and application requirements before ordering.
Dimensions
| Bore Diameter (d) | 45mm |
| Outer Diameter (D) | 100mm |
| Width (B) | 25mm |
| Weight | 0.86kg |
Load & Speed Ratings
| Dynamic Load Rating (Cr) | 102kN |
| Static Load Rating (C0r) | 101kN |
| Reference Speed | 6700rpm |
NJ309
Cylindrical Roller Bearing
Technical Specifications
| Part Number | NJ309 |
| Brand | Nachi |
| Bearing Type | Cylindrical Roller Bearing |
| Seal Type | Open |
| Material | Chrome Steel |
| Bore (Inner Diameter) | 45 mm |
| Outer Diameter | 100 mm |
| Width / Thickness | 25 mm |
| Dynamic Load Rating (Cr) | 102 kN |
| Static Load Rating (C0r) | 101 kN |
| Reference Speed | 6,700 rpm |
| Approximate Weight | 0.86 kg |
Enquire About the Nachi NJ309
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Technical Datasheet
Download full specifications for NJ309 — dimensions, load ratings, and material data.
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About the Nachi NJ309
The Nachi NJ309, is a cylindrical roller bearing, in an open configuration for maximum speed and easy relubrication, featuring a 45mm bore, 100mm outer diameter, and 25mm width, manufactured from chrome steel, and is extended stock at Buy Bearings.
A robust single-row bearing for heavy industrial machinery, capable of handling significant radial and unidirectional axial loads. [Cylindrical Roller Bearings](https://www.nachi-bearings.de/media/crb_dimensions_web.pdf)
Key Specifications
The NJ309 cylindrical roller bearing is specified with 45mm bore (inner diameter), 100mm outer diameter, 25mm width, 102kN dynamic load rating, 101kN static load rating, 6,700rpm reference speed, 0.86kg approximate weight. The Open sealing arrangement protects against contamination and retains lubricant for extended service life. The chrome steel construction provides excellent wear resistance and durability in demanding operating conditions.
Common Applications
Cylindrical Roller Bearings are commonly used in:
About Cylindrical Roller Bearings
Cylindrical roller bearings use cylindrical rollers to handle high radial loads. They are suitable for high-speed applications and can accommodate axial displacement of the shaft relative to the housing.
Why Buy the NJ309 from Buy Bearings?
- UK-authorised distributor with genuine Nachi products
- Expert technical support from our engineering team
- Competitive pricing with fast UK dispatch
- Full technical datasheet and cross-reference support
- 30-day returns on standard products
Frequently Asked Questions
What is a NJ309 bearing?
The NJ309 is a Nachi Cylindrical Roller Bearing with a 45mm bore, 100mm outer diameter and 25mm width. It is Extended Stock at Buy Bearings.
What are the NJ309 dimensions?
The NJ309 measures 45mm bore (inner diameter) × 100mm outer diameter × 25mm width.
What does Open mean on a bearing?
Open bearings have no seals or shields, allowing maximum speed and easy relubrication — best for clean, lubricated environments.
Is the NJ309 in stock?
The NJ309 is Extended Stock at Buy Bearings. Submit an enquiry or call our sales team for current stock and pricing (POA).
Related & Compatible Bearings
Same cylindrical roller bearing, closest dimensions first — useful if you need a slightly different size or this part is unavailable.
Related Parts — Seals & Bushings
Matching seals and bushings for 45mm shaft diameter — complementary components for your bearing.
