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NTN 7203HTDB/GMP5 is a 72 series duplex angular contact ball bearing with a 17 mm straight bore. It features a back-to-back (DB) arrangement and a machined brass cage. Designed for high-precision applications requiring axial rigidity and moment load capacity, this bearing is suitable for machine tool spindles and precision gearboxes.
MODEL 7203HTDB/GMP5
$864.64 Each
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2B
0.9449 in
B (in)
0.4724
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
Two
Contact angle
30 º
d (in)
0.6693
D (in)
1.5748
d1
0.9843 in
D1
1.2598 in
D2
1.4252 in
da min
0.8465 in
Db max
1.4764 in
Dynamic load rating
3100 lbf
Dynamic Load Rating
3100 lbf
Enclosure
Open
I.D.
17 mm
Limiting speed - grease
19000 RPM
Limiting Speed - Grease
19000 RPM
Limiting speed - oil
26000 RPM
Limiting Speed - Oil
26000 RPM
Material
High Carbon Chrome Steel
O.D.
40 mm
Operating temperature range
-40 to 250 ºF
Operating Temperature Range
-40 to 250 °F
Precision
ISO Class 5
Preload
Medium
r (in)
0.0236
r1
0.0118 in
r1as max
0.0118 in
ras max
0.0236 in
Static load rating
3700 lbf
Static Load Rating
3700 lbf
Type
Angular Contact Ball Bearing
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 26000 RPM |
Limiting Speed - Grease | 19000 RPM |
Precision | ISO Class 5 |
Configuration | Two |
Preload | Medium |
Static Load Rating | 3700 lbf16400 N16.40 kN |
Dynamic Load Rating | 3100 lbf13800 N13.80 kN |
Enclosure | Open |
Weight | 0.278 lb0.126 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 0.6693 in17.000 mm |
D | 1.5748 in40.000 mm |
B | 0.4724 in12.000 mm |
2B | 0.9449 in24.000 mm |
d1 | 0.9843 in25.000 mm |
D1 | 1.2598 in32.000 mm |
D2 | 1.4252 in36.200 mm |
r | 0.0236 in0.600 mm |
r1 | 0.0118 in0.300 mm |
Contact Angle | 30 |
da min | 0.8465 in21.500 mm |
Db max | 1.4764 in37.500 mm |
ras max | 0.0236 in0.600 mm |
r1as max | 0.0118 in0.300 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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