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NTN 33211 is a single row metric tapered roller bearing with a 55 mm straight bore. This open bearing features case carburized steel construction for durability under heavy radial and axial loads. Designed for gearboxes, wheel hubs, and industrial machinery.
MODEL 33211
$87.01 Each
Prices are subject to change
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Returnable:No
a (Effective Load Center)
-0.3740 in
B (in)
1.3780
Bore Type
Round
Bore type
Round
C (in)
1.0630
Configuration
One
d (in)
2.1654
D (in)
3.9370
da
2.56 in
Da
3.60 in
Da min
3.35 in
Db
3.78 in
db
2.44 in
Dynamic Load Rating
31000 lbf
Dynamic load rating
31000 lbf
e (Axial Load Factor)
0.40
Enclosure
Open
I.D.
2.1654 in
Limiting Speed - Grease
3600 RPM
Limiting speed - grease
3600 RPM
Limiting Speed - Oil
4900 RPM
Limiting speed - oil
4900 RPM
Lubrication
w/o Oil Hole
Material
Case carburized steel
O.D.
3.937 in
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 0
Precision rating
Class 0
R (in)
0.08
r (in)
0.0600
Static Load Rating
42500 lbf
Static load rating
42500 lbf
Style
Cone & cup
T (in)
1.3780
Type
Tapered Roller Bearing
Width
1.378 in
Y0 (Axial Load Factor)
0.83
Y2 (Axial Load Factor)
1.5
Technical Specifications
Type |
Tapered Roller Bearing |
Bore Type |
Round |
Material |
Case Carburized Steel |
Limiting Speed - Oil |
4900 RPM |
Limiting Speed - Grease |
3600 RPM |
Style |
Cone & Cup |
Precision Rating |
Class 0 |
Configuration |
One |
Lubrication |
w/o Oil Hole |
e (Axial Load Factor) |
0.40 |
Y2 (Axial Load Factor) |
1.5 |
Y0 (Axial Load Factor) |
0.83 |
Static Load Rating |
42500 lbf188000 N188.00 kN |
Dynamic Load Rating |
31000 lbf138000 N138.00 kN |
Enclosure |
Open |
Weight |
2.535 lb1.150 kg |
Operating Temperature Range |
-40 to 250 F-40 to 120 C |
Dimensional Specifications
|
|
|
d |
2.1654 in55.000 mm |
D |
3.9370 in100.000 mm |
C |
1.0630 in27.000 mm |
B |
1.3780 in35.000 mm |
a (Effective Load Center) |
-0.3740 in-9.500 mm |
T |
1.3780 in35.000 mm |
r |
0.0600 in1.500 mm |
R |
0.08 in2.0 mm |
da |
2.56 in65.0 mm |
db |
2.44 in62.0 mm |
Da |
3.60 in91.5 mm |
Da min |
3.35 in85.0 mm |
Db |
3.78 in96.0 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.