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NTN 1218C3 self-aligning ball bearing with a 90 mm straight bore, open enclosure, steel cage, and C3 clearance. This single-row bearing accommodates shaft misalignment and is suitable for applications such as fans, blowers, and textile machinery.
MODEL 1218C3
$377.18 Each
Prices are subject to change
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Returnable:No
Bearing Type
Self aligning ball bearing
Cage
Steel
Clearance
C3
Enclosure
Open
Height
6.299
I.D.
90 mm
Length
6.299
Material
High carbon chrome steel
O.D.
160 mm
Width
1.1811
Technical Specifications
Type | Self Aligning Ball Bearing |
|---|---|
Bore Type | Cylindrical |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 4300 RPM |
Limiting Speed - Grease | 3600 RPM |
Y1 | 3.80 |
Y2 | 5.80 |
Y0 | 3.90 |
Seal Type | None |
Seal Material | None |
Precision | Class 0 |
Configuration | One |
Radial Internal Clearance | C3 |
Static Load Rating | 5300 lbf23500 N23.50 kN |
Dynamic Load Rating | 12900 lbf57500 N57.50 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.5433 in90.000 mm |
|---|---|
D | 6.2992 in160.000 mm |
B | 1.1811 in30.000 mm |
r | 0.0787 in2.000 mm |
da min | 3.8976 in99.000 mm |
Da max | 5.9449 in151.000 mm |
ras max | 0.0787 in2.000 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.