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NTN 7219CDB/GMP4 is a duplex angular contact ball bearing with a 95 mm straight bore, arranged back-to-back for increased rigidity and moment load capacity. It features a machined brass cage, open enclosure, and P4 precision class. Constructed from high carbon chrome steel, this bearing is suitable for high-speed spindles and precision machine tool applications.
MODEL 7219CDB/GMP4
$2,981.51 Each
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2B
2.5197 in
B (in)
1.2598
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)
6.6929
d (in)
3.7402
d1
4.6535 in
D1
5.7795 in
D2
6.1811 in
da min
4.2126 in
Db max
6.4173 in
Dynamic Load Rating
51000 lbf
Dynamic load rating
51000 lbf
Enclosure
Open
I.D.
95 mm
Limiting Speed - Grease
4800 RPM
Limiting speed - grease
4800 RPM
Limiting Speed - Oil
6400 RPM
Limiting speed - oil
6400 RPM
Material
High carbon chrome steel
O.D.
170 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Medium
r (in)
0.0827
r1
0.0433 in
r1as max
0.0394 in
ras max
0.0787 in
Static Load Rating
54000 lbf
Static load rating
54000 lbf
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 | 6400 RPM |
Limiting Speed - Grease | 4800 RPM |
Precision | ISO Class 4 |
Configuration | Two |
Preload | Medium |
Static Load Rating | 54000 lbf240000 N240.00 kN |
Dynamic Load Rating | 51000 lbf226000 N226.00 kN |
Enclosure | Open |
Weight | 11.737 lb5.324 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.7402 in95.000 mm |
D | 6.6929 in170.000 mm |
B | 1.2598 in32.000 mm |
2B | 2.5197 in64.000 mm |
d1 | 4.6535 in118.200 mm |
D1 | 5.7795 in146.800 mm |
D2 | 6.1811 in157.000 mm |
r | 0.0827 in2.100 mm |
r1 | 0.0433 in1.100 mm |
Contact Angle | 15 |
da min | 4.2126 in107.000 mm |
Db max | 6.4173 in163.000 mm |
ras max | 0.0787 in2.000 mm |
r1as max | 0.0394 in1.000 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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