Ball Bearings vs. Roller Bearings: Which One Does Your Application Actually Need?
Both ball bearings and roller bearings serve the same fundamental purpose: reducing friction, supporting loads,

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The Fafnir 3MM9118WI-DUL Bearing is a set of two deep groove ball bearings designed for industrial automation and motion control systems. With a bore diameter of 90mm, an outside diameter of 140mm, and a width of 24mm, these bearings are made of steel and manufactured in the United States. The model number 7018C 3MM 9118 WI DUL ABEC7 indicates high precision and quality standards, making it a reliable choice for various mechanical power transmission applications.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9118WIDUL |
| Model | 7018C 3MM 9118 WI DUL ABEC7 |
| Bearing Type | Deep Groove Ball Bearing, Open |
| ID | 90 mm |
| OD | 140 mm |
| Width | 24 mm |
| Advertise | 1 |
|---|---|
| Material | Bearing Steel |
| Series | 9100 |
| Condition | New – Open box |
| Preload | Light |
| Category 1 | Ball & Roller Bearings |
| Category 2 | Bearings & Bushings |
| Category 3 | Business & Industrial |
| Category 4 | Industrial Automation & Motion Controls |
| Category 5 | Mechanical Power Transmission |
| Min Temp | -30°C |
| Cage Type | Machined |
| Dynamic Load Rating | 75.2 kN |
| Static Load Rating | 65.8 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Balls |
| Max Temp | 100°C |
| Item Weight | 2.56 lbs |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25°C |
| Mounting Arrangement | Universal |
| Internal Clearance | CN |
| Cross Reference 1 | SKF 7018 ACD/P4ADGA |
|---|---|
| Cross Reference 2 | FAG B7018-E-T-P4S |
| Cross Reference 3 | NSK 7018A5TYNSULP4 |
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