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NTN NU328C3 is a single-row cylindrical roller bearing with a 140 mm straight bore. The NU design features no flanges on the outer ring, making it separable and able to accommodate axial expansion. It has an open enclosure, C3 clearance, and a high-strength machined brass cage. The bearing is constructed from hardened alloy steel and is suitable for applications such as gearboxes, electric motors, and pumps where axial displacement is required.
MODEL NU328C3
$2,987.72 Each
Prices are subject to change
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Returnable:No
B (in)
2.4409
Bore Type
Round
Bore type
Round
Cage Material
High Strength Machined Brass Rivetless w/ square holes
Cage material
High strength machined brass rivetless w/ square holes
Configuration
One
d (in)
5.5118
D (in)
11.8110
Da max
11.1811 in
da min
6.1417 in
Db max
11.1811 in
db min
6.1417 in
Dynamic Load Rating
138000 lbf
Dynamic load rating
138000 lbf
Enclosure
Open
Fw
7.0866 in
I.D.
140 mm
Limiting Speed - Grease
2300 RPM
Limiting speed - grease
2300 RPM
Limiting Speed - Oil
2700 RPM
Limiting speed - oil
2700 RPM
Material
Hardened alloy steel
O.D.
300 mm
Oil Hole
w/o Oil Hole
Oil hole
w/o Oil Hole
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
r (in)
0.1575
r1as max
0.1181 in
Radial Internal Clearance
C3
Radial internal clearance
C3
Static Load Rating
167000 lbf
Static load rating
167000 lbf
Tolerance
ISO class 0 (RBEC 1)
Type
Cylindrical Roller Bearing
Technical Specifications
| Type | Cylindrical Roller Bearing |
|---|---|
| Bore Type | Round |
| Material | Hardened Alloy Steel |
| Cage Material | High Strength Machined Brass Rivetless w/ square holes |
| Limiting Speed - Oil | 2700 RPM |
| Limiting Speed - Grease | 2300 RPM |
| Configuration | One |
| Tolerance | ISO Class 0 (RBEC 1) |
| Oil Hole | w/o Oil Hole |
| Radial Internal Clearance | C3 |
| Static Load Rating | 167000 lbf745000 N745.00 kN |
| Dynamic Load Rating | 138000 lbf615000 N615.00 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 5.5118 in140.000 mm |
|---|---|
| D | 11.8110 in300.000 mm |
| B | 2.4409 in62.000 mm |
| Fw | 7.0866 in180.000 mm |
| r | 0.1575 in4.000 mm |
| da min | 6.1417 in156.000 mm |
| db min | 6.1417 in156.000 mm |
| Da max | 11.1811 in284.000 mm |
| Db max | 11.1811 in284.000 mm |
| r1as max | 0.1181 in3.000 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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