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NTN 7205HTDF/GMP5 is a duplex angular contact ball bearing with a face-to-face (DF) arrangement, 25 mm bore, and machined brass cage. This open bearing is designed for high-speed and high-precision applications requiring axial rigidity in both directions. The GMP5 precision class ensures tight tolerances for machine tool spindles and similar equipment.
MODEL 7205HTDF/GMP5
$367.87 Each
Prices are subject to change
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2B
1.1811 in
B (in)
0.5906
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)
0.9843
D (in)
2.0472
d1
1.3780 in
D1
1.3780 in
D2
1.8583 in
Da max
1.8307 in
da min
1.2008 in
Dynamic load rating
4550 lbf
Dynamic Load Rating
4550 lbf
Enclosure
Open
I.D.
25 mm
Limiting speed - grease
14000 RPM
Limiting Speed - Grease
14000 RPM
Limiting speed - oil
19000 RPM
Limiting Speed - Oil
19000 RPM
Material
High Carbon Chrome Steel
O.D.
52 mm
Operating temperature range
-40 to 250 ºF
Operating Temperature Range
-40 to 250 °F
Precision
ISO Class 5
Preload
Medium
r (in)
0.0394
r1
0.0236 in
r1as max
0.0236 in
ras max
0.0394 in
Static load rating
6450 lbf
Static Load Rating
6450 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 | 19000 RPM |
Limiting Speed - Grease | 14000 RPM |
Precision | ISO Class 5 |
Configuration | Two |
Preload | Medium |
Static Load Rating | 6450 lbf28800 N28.80 kN |
Dynamic Load Rating | 4550 lbf20200 N20.20 kN |
Enclosure | Open |
| 0.564 lb0.256 kg | |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 0.9843 in25.000 mm |
D | 2.0472 in52.000 mm |
B | 0.5906 in15.000 mm |
2B | 1.1811 in30.000 mm |
d1 | 1.3780 in35.000 mm |
D1 | 1.3780 in43.000 mm |
D2 | 1.8583 in47.200 mm |
r | 0.0394 in1.000 mm |
r1 | 0.0236 in0.600 mm |
Contact Angle | 30 |
da min | 1.2008 in30.500 mm |
Da max | 1.8307 in46.500 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.
