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NTN 30313 is a single row metric tapered roller bearing with a 65 mm straight bore. This open bearing features through hardened steel construction and is designed for combined radial and axial loads in gearboxes, wheel hubs, and industrial machinery.
MODEL 30313
$89.04 Each
Prices are subject to change
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Returnable:No
Bearing Type
Tapered roller bearing
Enclosure
Open
Height
5.512
I.D.
2.5591 in
Length
5.512
Material
Through hardened steel
O.D.
5.5118 in
Width
1.4173
Technical Specifications
| Type | Tapered Roller Bearing |
|---|---|
| Bore Type | Round |
| Material | Through Hardened Steel |
| Limiting Speed - Oil | 3700 RPM |
| Limiting Speed - Grease | 2800 RPM |
| Style | Cone & Cup |
| Precision Rating | Class 0 |
| Configuration | One |
| Lubrication | w/o Oil Hole |
| e (Axial Load Factor) | 0.35 |
| Y2 (Axial Load Factor) | 1.74 |
| Y0 (Axial Load Factor) | 0.96 |
| Static Load Rating | 53500 lbf238000 N238.00 kN |
| Dynamic Load Rating | 45500 lbf203000 N203.00 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 2.5591 in65.000 mm |
|---|---|
| D | 5.5118 in140.000 mm |
| C | 1.2992 in33.000 mm |
| B | 1.1024 in28.000 mm |
| a (Effective Load Center) | -0.2953 in-7.500 mm |
| T | 1.4173 in36.000 mm |
| r | 0.0800 in2.000 mm |
| R | 0.10 in2.5 mm |
| da | 3.11 in79.0 mm |
| db | 3.27 in83.0 mm |
| Da | 5.04 in128.0 mm |
| Da min | 4.80 in122.0 mm |
| Db | 5.12 in130.0 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
| Brand | Smith Bearings |
| Model | CR-11/16-BC |