The NSK HR30307J Tapered Roller Bearing is a single-row metric tapered roller bearing designed to support high radial loads and axial thrust loads in one direction. Its precision engineering and tapered roller geometry make it ideal for automotive, industrial, and mechanical applications where combined load performance and durability are required.
Technical Specifications
| Specification |
Detail |
| Brand |
NSK |
| Part Number |
HR30307J |
| Bearing Type |
Tapered Roller Bearing – Single Row |
| Inner Diameter (d) |
35 mm |
| Outer Diameter (D) |
80 mm |
| Total Width (T) |
22.75 mm |
| Width of Inner Ring (B) |
21 mm |
| Width of Outer Ring (C) |
18 mm |
| Basic Dynamic Load Rating (Cr) |
~93,500 N |
| Basic Static Load Rating (C0r) |
~79,000 N |
| Limiting Speed (Grease) |
~4,800 rpm |
| Limiting Speed (Oil-bath) |
~6,700 rpm |
| Weight (approx.) |
~0.538 kg |
| Condition |
Brand New |
| Origin |
NSK OEM quality |
| ISO Series |
ISO 355 (2FB metric tapered bearing)
|
This bearing includes a cone (inner ring + rollers + cage) and cup (outer ring) that must be assembled together during installation.
Product Overview
Tapered roller bearings like the HR30307J use conical rollers and raceways that converge at a common apex — allowing the bearing to handle radial loads and axial thrust loads (in one direction) simultaneously. Their design makes them suitable for moderate speed, heavy load applications where stability and long service life are important.
The NSK HR30307J features standard precision internal geometry, making it interchangeable with other metric 30307 series bearings from major brands (SKF, NTN, KOYO, etc.).
Key Features & Benefits
✔ Combined Load Support: Excellent strength under radial and unidirectional axial loads thanks to tapered roller geometry.
✔ Metric ISO Standard: Conforms to ISO 355 dimensional specs for metric tapered bearings.
✔ Robust Construction: Hardened steel rollers and rings ensure long service life and wear resistance.
✔ Separable Cone & Cup: Easy to install and adjust preload.
✔ Versatile Usage: Suitable for rotating shafts, hubs, gearboxes, and assemblies under combined loads.
How to Match to Vehicle & Equipment (Fitment Guidance)
Automotive / Vehicle Applications
The NSK HR30307J is a dimension-based bearing and is not tied to a specific published list of vehicle models/years. Automotive parts catalogs assign bearings by OEM part codes and dimensions rather than generic bearing numbers like HR30307J.
To determine if HR30307J fits your vehicle:
-
Check the OEM Bearing Code in your vehicle’s service manual or on the old bearing.
-
Confirm the bearing dimensions (35 × 80 × 22.75 mm) match those specified.
-
Verify that the application’s load direction and speed are consistent with tapered roller bearing use (e.g., hub supports, transmission shafts, differential carrier bearings).
Common automotive areas where this bearing size may be used when specified by OEM include:
-
Wheel hub assemblies (paired for axial support)
-
Transmission input/output shaft supports
-
Differential side or pinion support bearings
-
Steering knuckle or suspension pivot support
(Always cross-check with the vehicle’s parts catalog or VIN lookup before ordering.)
🛠 Industrial & Mechanical Applications
The HR30307J is also widely used in:
These systems commonly require metric tapered roller bearings when combined loads are present, making HR30307J a versatile choice.
Related / Equivalent Bearings
Dimension-matched alternatives (same 35×80×22.75 mm) include:
⚠ Always verify dimensions and load ratings before substituting between brands — bearing series can vary in internal clearance or cage design.
Installation & Fitment Notes
✔ Pairing: To support axial loads in both directions, tapered bearings are often arranged in back-to-back or face-to-face pairs.
✔ Preload & Clearance: Correct preload/clearance per assembly design ensures optimal service life.
✔ Lubrication: Use proper grease or oil depending on speed and operating conditions.
✔ Tolerance Checks: Ensure shaft and housing abutment surfaces meet bearing tolerance specs.
