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The NTN 6840ALLU is a 6800 series single-row deep groove ball bearing with a 200 mm bore. It features double contact rubber seals and a brass cage. Constructed from high carbon chrome steel, this bearing is designed for general industrial rotating equipment such as electric motors and pumps.
MODEL 6840ALLU
$2,676.49 Each
Prices are subject to change
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Returnable:No
B (in)
0.9449
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Brass
Cage material
Brass
Cage Type
High Strength, 2 piece, Machined
Cage type
High strength, 2 piece, machined
Configuration
One
D (in)
9.8425
d (in)
7.8740
Da max
9.5276 in
Dynamic Load Rating
18430 lbf
Dynamic load rating
18430 lbf
Enclosure
Double Sealed
Factor
16.1
I.D.
200 mm
Material
High carbon chrome steel
O.D.
250 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0591
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0591 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Contact
Seal type
Contact
Static Load Rating
20600 lbf
Static load rating
20600 lbf
Type
Deep Groove Ball Bearing
Technical Specifications
| Type | Deep Groove Ball Bearing |
|---|---|
| Bore Type | Round |
| Material | High Carbon Chrome Steel |
| Cage Type | High Strength, 2 piece, Machined |
| Cage Material | Brass |
| Ball Material | Steel |
| Seal Type | Contact |
| Seal Material | Nitrile Rubber |
| Precision | ISO Class 0 |
| Configuration | One |
| Factor | 16.1 |
| Radial Internal Clearance | CN |
| Static Load Rating | 20600 lbf91500 N91.50 kN |
| Dynamic Load Rating | 16600 lbf74000 N74.00 kN |
| Enclosure | Double Sealed |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 7.8740 in200.000 mm |
|---|---|
| D | 9.8425 in250.000 mm |
| B | 0.9449 in24.000 mm |
| r | 0.0591 in1.500 mm |
| Da max | 9.5276 in242.000 mm |
| ras max | 0.0591 in1.500 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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