EZO R2 Open Inch Ball Bearing 1/8 x 3/8 x 5/32 in (3.175 x 9.525 x 3.967 mm)
Available
This EZO range covers 8 inch series single row deep groove ball bearings, open, from 1/8 to 1 in bore (3.175 to 25.4 mm), with outer diameters of 9.525 to 50.8 mm and widths of 3.967 to 9.525 mm. Select the size from the drop-down: each size has its own bearing number and dimensions in the Model Details.
Deep groove bearings are the most widely used ball bearing type. They carry radial loads and axial loads in both directions, run at high speed and need no adjustment. These bearings are open, with no seals or shields, so they run with the least friction and take oil or grease from the machine.
Where this product is used
- Small electric motors, fans and appliances
- Power tools, 3D printers and hobby models
- Office equipment, instruments and light automation
Features
- Open design with no seals or shields: the lowest friction and the highest speed capability, with oil or grease lubrication supplied by the machine
- Basic dynamic load ratings 0.63 to 9.38 kN and static load ratings 0.22 to 5.06 kN across the sizes with published ratings
- Inch series sizes for imperial shafts and housings, with the metric dimensions given in the Model Details
Key specifications
| Specification | Detail |
|---|---|
| Type | Single row deep groove ball bearing |
| Bearing numbers | 8, from R2 to R16 |
| Bore d | 1/8 to 1 in (3.175 to 25.4 mm) |
| Outer diameter D | 9.525 to 50.8 mm |
| Width B | 3.967 to 9.525 mm |
| Seals / shields | Open (no seals or shields) |
| Radial internal clearance | Normal (CN) |
| Material | High carbon chromium bearing steel rings and balls |
Available sizes
| Model | Size d x D x B (mm) | Size d x D x B (in) | Cr (kN) | Cor (kN) | Limiting speed, grease (rpm) |
|---|---|---|---|---|---|
| R2 | 3.175 x 9.525 x 3.967 | 1/8 x 3/8 x 5/32 | 0.63 | 0.22 | 56,000 |
| R3 | 4.762 x 12.7 x 3.967 | 3/16 x 1/2 x 5/32 | 1.3 | 0.49 | 43,000 |
| R4 | 6.35 x 15.875 x 4.978 | 1/4 x 5/8 x 0.196 | 1.48 | 0.62 | 38,000 |
| R6 | 9.525 x 22.225 x 5.558 | 3/8 x 7/8 x 7/32 | 3.33 | 1.41 | 32,000 |
| R8 | 12.7 x 28.575 x 6.35 | 1/2 x 1-1/8 x 1/4 | 5.11 | 2.41 | 27,000 |
| R10 | 15.875 x 34.925 x 7.142 | 5/8 x 1-3/8 x 9/32 | 6 | 3.27 | 21,000 |
| R12 | 19.05 x 41.275 x 7.938 | 3/4 x 1-5/8 x 5/16 | 9.38 | 5.06 | 17,000 |
| R16 | 25.4 x 50.8 x 9.525 | 1 x 2 x 3/8 | – | – | – |
Load ratings and speeds are not published for the R16.
Selecting the right option
Open bearings give the lowest friction and the highest speed capability, and are the only version with an oil speed rating, but they rely on the housing for lubrication and protection. Choose a shielded or sealed bearing where the bearing is exposed.
Fitting and use
Check the load and speed against the figures for your size before ordering and apply a suitable safety factor. Deep groove bearings must always carry a minimum radial load so the balls roll rather than slide, and heavy axial loads should be checked with AIMS before ordering.
Press on the ring that is being fitted, not the other ring or the balls: force goes through the side face of the inner ring on a shaft and through the outer ring in a housing.
Related products
Also available from EZO: sealed and shielded inch ball bearings (16 sizes).
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1/8 x 3/8 x 5/32"mm bearing
Model Number: R2/EZO
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1/4 x 5/8 x 0.196"mm bearing
Model Number: R4/EZO
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1/2 x 1-1/8 x 1/4"mm bearing
Model Number: R8/EZO
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1 x 2 x 3/8"mm bearing
Model Number: R16/EZO
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3/16 x 1/2 x 5/32"mm bearing
Model Number: R3/EZO
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3/8 x 7/8 x 7/32"mm bearing
Model Number: R6/EZO
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3/4 x 1-5/8 x 5/16"mm bearing
Model Number: R12/EZO
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5/8 x 1-3/8 x 9/32"mm bearing
Model Number: R10/EZO
