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The NTN 6310LLUNR is a 63 series single-row deep groove ball bearing with a 50 mm straight bore. It features double rubber contact seals (LLU) and includes a snap ring for axial location in the housing. The bearing uses a stamped steel cage and is pre-greased for maintenance-free operation. Suitable for electric motors, pumps, fans, and general industrial rotating machinery.
MODEL 6310LLUNR
$144.43 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
a (in)
0.1291
B (in)
1.0630
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Steel
Cage material
Steel
Cage Type
Pressed
Cage type
Pressed
Configuration
One
D (in)
4.3307
d (in)
1.9685
D1
4.2051 in
D2
4.5906 in
Da max
3.9764 in
da max
2.6969 in
da min
2.3228 in
Dynamic Load Rating
15390 lbf
Dynamic load rating
15390 lbf
Enclosure
Double Sealed
f (in)
0.0969
Factor
13.2
I.D.
50 mm
Limiting Speed - Grease
4200 RPM
Limiting speed - grease
4200 RPM
Material
High carbon chrome steel
O.D.
110 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0787
r1
0.0197 in
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0787 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Contact
Seal type
Contact
Static Load Rating
8650 lbf
Static load rating
8650 lbf
Type
Deep Groove Ball Bearing
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 | 4200 RPM |
Seal Type | Contact |
Seal Material | Nitrile Rubber |
Precision | ISO Class 0 |
Configuration | One |
Factor | 13.2 |
Radial Internal Clearance | CN |
Static Load Rating | 8650 lbf38500 N38.50 kN |
Dynamic Load Rating | 13900 lbf62000 N62.00 kN |
Enclosure | Double Sealed |
| 2.377 lb1.078 kg | |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.9685 in50.000 mm |
D | 4.3307 in110.000 mm |
B | 1.0630 in27.000 mm |
D1 | 4.2051 in106.810 mm |
D2 | 4.5906 in116.600 mm |
a | 0.1291 in3.280 mm |
f | 0.0969 in2.460 mm |
r | 0.0787 in2.000 mm |
r1 | 0.0197 in0.500 mm |
da min | 2.3228 in59.000 mm |
da max | 2.6969 in68.500 mm |
Da max | 3.9764 in101.000 mm |
ras max | 0.0787 in2.000 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.
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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