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The NTN 755/752 is an inch series tapered roller bearing with a straight bore and open design. Constructed from case carburized steel, it is suitable for moderate to heavy radial and axial loads in industrial gearboxes, conveyors, and axle housings.
MODEL 755/752
$226.03 Each
Prices are subject to change
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Returnable:No
a (Effective Load Center)
-0.4700 in
B (in)
3.0000
Bore Type
Round
Bore type
Round
Cone Number
755
Configuration
One
Cup Number
752
D (in)
6.3750
Dynamic Load Rating
67000 lbf
Dynamic load rating
67000 lbf
e (Axial Load Factor)
0.34
Enclosure
Open
I.D.
3 in
Lubrication
w/o Oil Hole
Material
Case carburized steel
O.D.
6.375 in
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 2
Precision rating
Class 2
r (in)
0.1300
R (in)
0.14
Static Load Rating
99000 lbf
Static load rating
99000 lbf
Style
Cone & cup
Type
Tapered Roller Bearing
U
3.74 in
V
3.46 in
W
1.8750 in
Wi
1.9000 in
Width
1.9
Wo
1.5000 in
X
5.91 in
Y2 (Axial Load Factor)
1.76
Z
5.67 in
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Case Carburized Steel |
Style | Cone & Cup |
Precision Rating | Class 2 |
Cone Number | 755 |
Cup Number | 752 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.34 |
Y2 (Axial Load Factor) | 1.76 |
Static Load Rating | 99000 lbf440000 N440.00 kN |
Dynamic Load Rating | 67000 lbf297000 N297.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
B | 3.0000 in76.200 mm |
D | 6.3750 in161.925 mm |
Wo | 1.5000 in38.100 mm |
Wi | 1.9000 in48.260 mm |
W | 1.8750 in47.625 mm |
r | 0.1300 in3.300 mm |
R | 0.14 in3.5 mm |
a (Effective Load Center) | -0.4700 in-11.900 mm |
U | 3.74 in95.0 mm |
V | 3.46 in88.0 mm |
X | 5.91 in150.0 mm |
Z | 5.67 in144.0 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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