EZO R2-2RS Sealed 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 16 inch series single row deep groove ball bearings, shielded (ZZ) and sealed (2RS), from 1/8 to 3/4 in bore (3.175 to 19.05 mm), with outer diameters of 9.525 to 41.275 mm and widths of 3.967 to 11.113 mm. Select the size from the drop-down: each size has its own bearing number and dimensions, load ratings and limiting speed 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. Each size is available with two pressed steel shields (ZZ) or two contact rubber seals (2RS); both are grease filled for life.
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
- Two pressed steel shields (ZZ) hold the grease in and keep larger particles out without touching the inner ring, so friction stays low and speed capability high
- Two contact rubber seals (2RS) of nitrile rubber (NBR) hold the factory grease in and keep dust, dirt and splashes out
- Basic dynamic load ratings 0.63 to 9.38 kN and static load ratings 0.22 to 5.06 kN across the range
- 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 | 16, from R2-2RS to R12-ZZ |
| Bore d | 1/8 to 3/4 in (3.175 to 19.05 mm) |
| Outer diameter D | 9.525 to 41.275 mm |
| Width B | 3.967 to 11.113 mm |
| Seals / shields | Two pressed steel shields (ZZ) and two contact rubber seals (2RS) |
| Radial internal clearance | Normal (CN) |
| Material | High carbon chromium bearing steel rings and balls |
| Basic dynamic load rating Cr | 0.63 to 9.38 kN |
| Basic static load rating Cor | 0.22 to 5.06 kN |
Available sizes
Show all 16 sizes
| Model | Size d x D x B (mm) | Size d x D x B (in) | Closure | Cr (kN) | Cor (kN) | Limiting speed, grease (rpm) |
|---|---|---|---|---|---|---|
| R2-2RS | 3.175 x 9.525 x 3.967 | 1/8 x 3/8 x 5/32 | Rubber seals (2RS) | 0.63 | 0.22 | 56,000 |
| R2-ZZ | 3.175 x 9.525 x 3.967 | 1/8 x 3/8 x 5/32 | Metal shields (ZZ) | 0.63 | 0.22 | 56,000 |
| R3-2RS | 4.762 x 12.7 x 4.978 | 3/16 x 1/2 x 0.196 | Rubber seals (2RS) | 1.3 | 0.49 | 43,000 |
| R3-ZZ | 4.762 x 12.7 x 4.978 | 3/16 x 1/2 x 0.196 | Metal shields (ZZ) | 1.3 | 0.49 | 43,000 |
| R4-2RS | 6.35 x 15.875 x 4.978 | 1/4 x 5/8 x 0.196 | Rubber seals (2RS) | 1.48 | 0.62 | 38,000 |
| R4-ZZ | 6.35 x 15.875 x 4.978 | 1/4 x 5/8 x 0.196 | Metal shields (ZZ) | 1.48 | 0.62 | 38,000 |
| R4A-2RS | 6.35 x 19.05 x 7.142 | 1/4 x 3/4 x 9/32 | Rubber seals (2RS) | 2.34 | 0.9 | 36,000 |
| R4A-ZZ | 6.35 x 19.05 x 7.142 | 1/4 x 3/4 x 9/32 | Metal shields (ZZ) | 2.34 | 0.9 | 36,000 |
| R6-2RS | 9.525 x 22.225 x 7.142 | 3/8 x 7/8 x 9/32 | Rubber seals (2RS) | 3.33 | 1.41 | 32,000 |
| R6-ZZ | 9.525 x 22.225 x 7.142 | 3/8 x 7/8 x 9/32 | Metal shields (ZZ) | 3.33 | 1.41 | 32,000 |
| R8-2RS | 12.7 x 28.575 x 7.938 | 1/2 x 1-1/8 x 5/16 | Rubber seals (2RS) | 5.11 | 2.41 | 27,000 |
| R8-ZZ | 12.7 x 28.575 x 7.938 | 1/2 x 1-1/8 x 5/16 | Metal shields (ZZ) | 5.11 | 2.41 | 27,000 |
| R10-2RS | 15.875 x 34.925 x 8.733 | 5/8 x 1-3/8 x 11/32 | Rubber seals (2RS) | 6 | 3.27 | 21,000 |
| R10-ZZ | 15.875 x 34.925 x 8.733 | 5/8 x 1-3/8 x 11/32 | Metal shields (ZZ) | 6 | 3.27 | 21,000 |
| R12-2RS | 19.05 x 41.275 x 11.113 | 3/4 x 1-5/8 x 7/16 | Rubber seals (2RS) | 9.38 | 5.06 | 17,000 |
| R12-ZZ | 19.05 x 41.275 x 11.113 | 3/4 x 1-5/8 x 7/16 | Metal shields (ZZ) | 9.38 | 5.06 | 17,000 |
Limiting speed is the grease rating for the size; contact seals reduce it.
Selecting the right option
Pressed steel shields (ZZ) retain the grease and keep larger particles out without touching the inner ring, so friction stays low and speed capability high. A shield is not a seal: fine dust and moisture can still enter, so choose 2RS where dust, splashes or damp are present.
Contact rubber seals (2RS) give better protection against dust, dirt and splashes than shields and hold the factory grease in. The seal lips add friction, so a sealed bearing runs slower than an open or shielded bearing of the same size, and a high speed application is better served by an open or shielded bearing.
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.
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.
Sealed and shielded bearings are lubricated at the factory and built for inner ring rotation. Do not wash them or heat them before mounting, and do not rely on them for high speed outer ring rotation.
Related products
Also available from EZO: open inch ball bearings (8 sizes).
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EZO R2-R12 Inch Ball Bearings, Metal Shielded (ZZ) and Rubber Sealed (2RS), 1/8 to 3/4 in Bore: 1/8 x 3/8 x 5/32" / Rubber seals (2RS)
SKU: A0177811 | Model: R2-2RS/EZO
