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NTN 32021X single row metric tapered roller bearing with 105 mm straight bore. Open design with through hardened steel construction. Handles combined radial and axial loads in gearboxes, wheel hubs, and industrial machinery.
MODEL 32021X
$121.92 Each
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Returnable:No
a (Effective Load Center)
-0.0197 in
B (in)
1.3780
Bore Type
Round
Bore type
Round
C (in)
1.0236
Configuration
One
d (in)
4.1339
D (in)
6.2992
da
4.61 in
Da
5.91 in
Da min
5.63 in
Db
6.06 in
db
4.57 in
Dynamic Load Rating
45000 lbf
Dynamic load rating
45000 lbf
e (Axial Load Factor)
0.44
Enclosure
Open
I.D.
4.1339 in
Limiting Speed - Grease
2100 RPM
Limiting speed - grease
2100 RPM
Limiting Speed - Oil
2800 RPM
Limiting speed - oil
2800 RPM
Lubrication
w/o Oil Hole
Material
Through hardened steel
O.D.
6.2992 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)
0.0800
Static Load Rating
75500 lbf
Static load rating
75500 lbf
Style
Cone & cup
T (in)
1.3780
Type
Tapered Roller Bearing
Y0 (Axial Load Factor)
0.74
Y2 (Axial Load Factor)
1.35
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Through Hardened Steel |
Limiting Speed - Oil | 2800 RPM |
Limiting Speed - Grease | 2100 RPM |
Style | Cone & Cup |
Precision Rating | Class 0 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.44 |
Y2 (Axial Load Factor) | 1.35 |
Y0 (Axial Load Factor) | 0.74 |
Static Load Rating | 75500 lbf335000 N335.00 kN |
Dynamic Load Rating | 45000 lbf201000 N201.00 kN |
Enclosure | Open |
Weight | 5.335 lb2.420 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 4.1339 in105.000 mm |
D | 6.2992 in160.000 mm |
C | 1.0236 in26.000 mm |
B | 1.3780 in35.000 mm |
a (Effective Load Center) | -0.0197 in-0.500 mm |
T | 1.3780 in35.000 mm |
r | 0.0800 in2.000 mm |
R | 0.08 in2.0 mm |
da | 4.61 in117.0 mm |
db | 4.57 in116.0 mm |
Da | 5.91 in150.0 mm |
Da min | 5.63 in143.0 mm |
Db | 6.06 in154.0 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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