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NTN 30312D is a single row metric tapered roller bearing with a 60 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 30312D
$81.51 Each
Prices are subject to change
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Returnable:No
Bearing Type
Tapered roller bearing
Enclosure
Open
Material
Through hardened steel
Technical Specifications
Type | Tapered Roller Bearing |
|---|---|
Bore Type | Round |
Material | Through Hardened Steel |
Limiting Speed - Oil | 3600 RPM |
Limiting Speed - Grease | 2700 RPM |
Style | Cone & Cup |
Precision Rating | Class 0 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.83 |
Y2 (Axial Load Factor) | 0.73 |
Y0 (Axial Load Factor) | 0.40 |
Static Load Rating | 39500 lbf176000 N176.00 kN |
Dynamic Load Rating | 33500 lbf150000 N150.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.3622 in60.000 mm |
|---|---|
D | 5.1181 in130.000 mm |
C | 0.8661 in22.000 mm |
B | 1.2205 in31.000 mm |
a (Effective Load Center) | 0.2756 in7.000 mm |
T | 1.3189 in33.500 mm |
r | 0.0800 in2.000 mm |
R | 0.10 in2.5 mm |
da | 2.91 in74.0 mm |
db | 2.87 in73.0 mm |
Da | 4.65 in118.0 mm |
Da min | 4.06 in103.0 mm |
Db | 4.88 in124.0 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.