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NTN 30208UP4 is a 302 series single row metric tapered roller bearing with a 40 mm straight bore. Open design with through hardened steel construction. P4 precision class for high-accuracy applications. Suitable for gearboxes, machine tool spindles, and industrial drives.
MODEL 30208UP4
$1,218.00 Each
Prices are subject to change
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Returnable:No
a (Effective Load Center)
-0.1280 in
B (in)
0.7087
Bore Type
Round
Bore type
Round
C (in)
0.6299
Configuration
One
D (in)
3.1496
d (in)
1.5748
Da
2.81 in
da
1.91 in
Da min
2.72 in
Db
2.95 in
db
1.93 in
Dynamic Load Rating
13700 lbf
Dynamic load rating
13700 lbf
e (Axial Load Factor)
0.37
Enclosure
Open
I.D.
1.5748 in
Limiting Speed - Grease
4900 RPM
Limiting speed - grease
4900 RPM
Limiting Speed - Oil
6600 RPM
Limiting speed - oil
6600 RPM
Lubrication
w/o Oil Hole
Material
Through hardened steel
O.D.
3.1496 in
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 4
Precision rating
Class 4
R (in)
0.06
r (in)
0.0600
Static Load Rating
15100 lbf
Static load rating
15100 lbf
Style
Cone & cup
T (in)
0.7776
Type
Tapered Roller Bearing
Y0 (Axial Load Factor)
0.88
Y2 (Axial Load Factor)
1.6
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Through Hardened Steel |
Limiting Speed - Oil | 6600 RPM |
Limiting Speed - Grease | 4900 RPM |
Style | Cone & Cup |
Precision Rating | Class 4 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.37 |
Y2 (Axial Load Factor) | 1.6 |
Y0 (Axial Load Factor) | 0.88 |
Static Load Rating | 15100 lbf67000 N67.00 kN |
Dynamic Load Rating | 13700 lbf61000 N61.00 kN |
Enclosure | Open |
Weight | 0.919 lb0.417 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.5748 in40.000 mm |
D | 3.1496 in80.000 mm |
C | 0.6299 in16.000 mm |
B | 0.7087 in18.000 mm |
a (Effective Load Center) | -0.1280 in-3.250 mm |
T | 0.7776 in19.750 mm |
r | 0.0600 in1.500 mm |
R | 0.06 in1.5 mm |
da | 1.91 in48.5 mm |
db | 1.93 in49.0 mm |
Da | 2.81 in71.5 mm |
Da min | 2.72 in69.0 mm |
Db | 2.95 in75.0 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.
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