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NTN 7005DB/GNP4 is a duplex angular contact ball bearing with a 25 mm straight bore, arranged back-to-back (DB) for increased rigidity and moment load capacity. Features a nylon cage, open enclosure, and high carbon chrome steel construction. Suitable for precision spindles and machine tool applications requiring high axial and radial load support.
MODEL 7005DB/GNP4
$534.24 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
Nylon
Cage Material
Nylon
Cage type
Fiber glass reinforced
Cage Type
Fiber Glass Reinforced
Configuration
Two
Contact angle
30 º
D (in)
1.8504
d (in)
0.9843
D1
1.5512 in
d1
1.2835 in
D2
1.6850 in
d2
1.2165 in
Da max
1.6732 in
da min
1.1614 in
Db max
1.7520 in
Enclosure
Open
I.D.
25 mm
Limiting speed - grease
19120 RPM
Limiting Speed - Grease
19120 RPM
Limiting speed - oil
26000 RPM
Limiting Speed - Oil
26000 RPM
Material
High Carbon Chrome Steel
O.D.
47 mm
Operating temperature range
-40 to 250 ºF
Operating Temperature Range
-40 to 250 °F
Precision
ISO Class 4
Preload
Normal
r (in)
0.0236
r1
0.0118 in
r1as max
0.0118 in
ras max
0.0236 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 |
26000 RPM |
Limiting Speed - Grease |
19120 RPM |
Precision |
ISO Class 4 |
Configuration |
Two |
Preload |
Normal |
Enclosure |
Open |
Weight |
0.331 lb0.150 kg |
Operating Temperature Range |
-40 to 250 F-40 to 120 C |
Dimensional Specifications
|
|
|
d |
0.9843 in25.000 mm |
D |
1.8504 in47.000 mm |
B |
0.4724 in12.000 mm |
2B |
0.9449 in24.000 mm |
d1 |
1.2835 in32.600 mm |
d2 |
1.2165 in30.900 mm |
D1 |
1.5512 in39.400 mm |
D2 |
1.6850 in42.800 mm |
r |
0.0236 in0.600 mm |
r1 |
0.0118 in0.300 mm |
Contact Angle |
30 |
da min |
1.1614 in29.500 mm |
Da max |
1.6732 in42.500 mm |
Db max |
1.7520 in44.500 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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