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NTN 7011CDB/GNP5 is a duplex angular contact ball bearing in a back-to-back arrangement with a 55 mm straight bore. This open bearing features a nylon cage and is constructed from high carbon chrome steel. Designed for precision applications requiring high axial and radial load capacity in both directions.
MODEL 7011CDB/GNP5
$716.62 Each
Prices are subject to change
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2B
1.4173 in
B (in)
0.7087
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Nylon
Cage material
Nylon
Cage Type
Fiber Glass Reinforced
Cage type
Fiber glass reinforced
Configuration
Two
Contact angle
15 º
D (in)
3.5433
d (in)
2.1654
D1
3.0748 in
d1
2.6339 in
D2
3.2913 in
d2
2.5315 in
Da max
3.2677 in
da min
2.4409 in
Db max
3.3661 in
Enclosure
Open
I.D.
55 mm
Limiting Speed - Grease
12960 RPM
Limiting speed - grease
12960 RPM
Limiting Speed - Oil
20720 RPM
Limiting speed - oil
20720 RPM
Material
High carbon chrome steel
O.D.
90 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO Class 5
Preload
Normal
r (in)
0.0433
r1
0.0236 in
r1as max
0.0236 in
ras max
0.0394 in
Type
Angular Contact Ball Bearing
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Fiber Glass Reinforced |
Cage Material | Nylon |
Ball Material | Steel |
Limiting Speed - Oil | 20720 RPM |
Limiting Speed - Grease | 12960 RPM |
Precision | ISO Class 5 |
Configuration | Two |
Preload | Normal |
Enclosure | Open |
Weight | 1.636 lb0.742 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.1654 in55.000 mm |
D | 3.5433 in90.000 mm |
B | 0.7087 in18.000 mm |
2B | 1.4173 in36.000 mm |
d1 | 2.6339 in66.900 mm |
d2 | 2.5315 in64.300 mm |
D1 | 3.0748 in78.100 mm |
D2 | 3.2913 in83.600 mm |
r | 0.0433 in1.100 mm |
r1 | 0.0236 in0.600 mm |
Contact Angle | 15 |
da min | 2.4409 in62.000 mm |
Da max | 3.2677 in83.000 mm |
Db max | 3.3661 in85.500 mm |
ras max | 0.0394 in1.000 mm |
r1as max | 0.0236 in0.600 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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