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NTN 7018 is a single-row angular contact ball bearing with a 90 mm straight bore. Part of the 70 series, it is designed to accommodate combined radial and axial loads. The open design allows for custom lubrication. Common applications include machine tool spindles, pumps, and compressors.
MODEL 7018
$384.95 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
Enclosure
Open
Height
5.512
I.D.
90 mm
Length
5.512
O.D.
140 mm
Width
0.9449
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | High Strength, 2 piece, Machined |
Cage Material | Brass |
Ball Material | Steel |
Limiting Speed - Oil | 6500 RPM |
Limiting Speed - Grease | 4900 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 14300 lbf63500 N63.50 kN |
Dynamic Load Rating | 14600 lbf65000 N65.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.5433 in90.000 mm |
D | 5.5118 in140.000 mm |
B | 0.9449 in24.000 mm |
r | 0.0591 in1.500 mm |
r1 | 0.0236 in0.600 mm |
Contact Angle | 30 |
a (Load Center) | 1.7717 in45.000 mm |
da min | 3.8780 in98.500 mm |
Da max | 5.1772 in131.500 mm |
Db max | 5.2953 in134.500 mm |
ras max | 0.0591 in1.500 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 1.8898 in48.000 mm |
Triple Row Width | 2.8346 in72.000 mm |
Quadruple Row Width | 3.7795 in96.000 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.