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NTN 6318LLUC3 63 series single-row deep groove ball bearing with a 90 mm straight bore. Double rubber contact seals (NBR) and a stamped steel cage. C3 internal clearance accommodates thermal expansion. Constructed from high carbon chrome steel for electric motors, pumps, fans, and general rotating machinery.
MODEL 6318LLUC3
$535.84 Each
Prices are subject to change
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Returnable:No
Axial Static Load Rating
24055 lbf
Axial static load rating
24055 lbf
B (in)
1.6930
Ball Material
Through Hardened Steel
Ball material
Through hardened steel
Bore Type
0
Bore type
0
Cage Material
Pressed Steel
Cage material
Pressed steel
Cage Type
Pressed
Cage type
Pressed
Clearance
C3
Configuration
One
D (in)
7.4800
d (in)
3.5430
Da max
6.9685 in
da max
4.6457 in
Dynamic Load Rating
35522 lbf
Dynamic load rating
35522 lbf
Enclosure
Full Contact Seal - Both Sides
Factor
13.3
Height
7.48
I.D.
90 mm
Length
7.48
Limiting Speed - Grease
2400 RPM
Limiting speed - grease
2400 RPM
Material
High carbon chrome steel
O.D.
190 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
0
Precision
ISO class 0
r (in)
0.1181
r1
0.0197 in
Radial Dynamic Load Rating
35520 lbf
Radial Internal Clearance
0
Radial internal clearance
0
ras max
0.0984 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Contact
Seal type
Contact
Static Load Rating
24056 lbf
Static load rating
24056 lbf
Type
Deep Groove Ball Bearing
Width
1.6929
Technical Specifications
Type | Deep Groove Ball Bearing |
|---|---|
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Grease | 2400 RPM |
Seal Type | Contact |
Seal Material | Nitrile Rubber |
Precision | ISO Class 0 |
Configuration | One |
Factor | 13.3 |
Radial Internal Clearance | C3 |
Static Load Rating | 24100 lbf107000 N107.00 kN |
Dynamic Load Rating | 32000 lbf143000 N143.00 kN |
Enclosure | Double Sealed |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.5433 in90.000 mm |
|---|---|
D | 7.4803 in190.000 mm |
B | 1.6929 in43.000 mm |
r | 0.1181 in3.000 mm |
r1 | 0.0197 in0.500 mm |
da max | 4.6457 in118.000 mm |
Da max | 6.9685 in177.000 mm |
ras 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.
What is the difference between deep groove and angular contact ball bearings?
Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.
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