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NTN NU317C3 is a single-row cylindrical roller bearing with an 85 mm straight bore. The NU design features no flanges on the outer ring, making it separable and able to accommodate axial expansion. It is open with a pressed steel cage and C3 clearance. Constructed from hardened alloy steel, it is suitable for gearboxes, electric motors, and pumps.
MODEL NU317C3
$507.39 Each
Prices are subject to change
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Returnable:No
B (in)
1.6142
Bore Type
Round
Bore type
Round
Cage Material
Pressed Steel
Cage material
Pressed steel
Cage Type
Pressed Steel
Cage type
Pressed steel
Configuration
One
d (in)
3.3465
D (in)
7.0866
Da max
6.5748 in
da min
3.8583 in
Db max
6.5748 in
db min
3.8583 in
Dynamic Load Rating
47500 lbf
Dynamic load rating
47500 lbf
Enclosure
Open
Fw
4.2520 in
I.D.
85 mm
Limiting Speed - Grease
3900 RPM
Limiting speed - grease
3900 RPM
Limiting Speed - Oil
4600 RPM
Limiting speed - oil
4600 RPM
Material
Hardened alloy steel
O.D.
180 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
Precision
ISO class 0
r (in)
0.0984
r1as max
0.0984 in
Radial Internal Clearance
C3
Radial internal clearance
C3
Static Load Rating
51500 lbf
Static load rating
51500 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 Type | Pressed Steel |
Cage Material | Pressed Steel |
Limiting Speed - Oil | 4600 RPM |
Limiting Speed - Grease | 3900 RPM |
Precision | ISO Class 0 |
Configuration | One |
Tolerance | ISO Class 0 (RBEC 1) |
Oil Hole | w/o Oil Hole |
Radial Internal Clearance | C3 |
Static Load Rating | 51500 lbf228000 N228.00 kN |
Dynamic Load Rating | 47500 lbf212000 N212.00 kN |
Enclosure | Open |
Weight | 9.855 lb4.470 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.3465 in85.000 mm |
D | 7.0866 in180.000 mm |
B | 1.6142 in41.000 mm |
Fw | 4.2520 in108.000 mm |
r | 0.0984 in2.500 mm |
da min | 3.8583 in98.000 mm |
db min | 3.8583 in98.000 mm |
Da max | 6.5748 in167.000 mm |
Db max | 6.5748 in167.000 mm |
r1as max | 0.0984 in2.500 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.
| Brand | Pfannenberg |
| Model | 28250088000 |
| Brand | Boston Gear |
| Model | 862B-3.3K-M1 |
