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NTN 6948 is a single-row deep groove ball bearing with a 240 mm straight bore. This open-type bearing is designed for high radial loads and moderate axial loads in electric motors, pumps, and general industrial machinery.
MODEL 6948
$4,909.54 Each
Prices are subject to change
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Returnable:No
B (in)
1.4961
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)
12.5984
d (in)
9.4488
Da max
12.1654 in
da min
9.8819 in
Dynamic Load Rating
42260 lbf
Dynamic load rating
42260 lbf
Enclosure
Open
Factor
16.5
I.D.
240 mm
Limiting Speed - Grease
1800 RPM
Limiting speed - grease
1800 RPM
Limiting Speed - Oil
2100 RPM
Limiting speed - oil
2100 RPM
Material
High carbon chrome steel
O.D.
320 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
Class 0
r (in)
0.0827
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0787 in
Static Load Rating
45630 lbf
Static load rating
45630 lbf
Type
Deep Groove Ball Bearing
Width
38 mm
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 |
Limiting Speed - Oil | 2100 RPM |
Limiting Speed - Grease | 1800 RPM |
Precision | Class 0 |
Configuration | One |
Factor | 16.5 |
Radial Internal Clearance | CN |
Static Load Rating | 45500 lbf203000 N203.00 kN |
Dynamic Load Rating | 38000 lbf170000 N170.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
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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