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Product Specifications:
| Item | Miniature Ball Bearing |
| Abec Rating | 1 |
| Abec Tolerance | 1 |
| Ball Material | Alloy Steel |
| Ball Material Grade | Grade AISI 52100 |
| Bearing Industry Number | 638 |
| Bore Dia. | 8 mm |
| Bore Diameter Tolerance | -0.008 mm to 0 mm |
| Cage Type | Sealed |
| Closure | Double Sealed |
| Closure & Seal Type | Double Sealed, Contact Seal |
| Dynamic Load Capacity | 1020 lbf. |
| Dynamic Radial Load Capacity | 1020 lbf. |
| For Environment | Oily, Greasy |
| Includes Retaining Ring | No |
| Lubricant Material | Polyrex EM |
| Max. Speed | 34000 RPM |
| Max. Temp. | 302°F |
| Min. Temp. | -40°F |
| Miniature Bearing | Yes |
| Outer Ring Width | 9 mm |
| Outside Dia. | 28 mm |
| Outside Diameter Tolerance | -0.009 mm to 0 mm |
| Retaining Ring Dia. | Not Applicable |
| Retaining Ring Groove | No |
| Retaining Ring Thickness | Not Applicable |
| Ring Material | Alloy Steel |
| Ring Material Grade | Grade AISI 52100 |
| Seal Material | Rubber |
| Seal Type | Contact |
| Standards | Afbma, Iso Certified 9001 |
| Static Load Capacity | 450 lbf. |
| Static Radial Load Capacity | 450 lbf. |
| System Of Measurement | Metric |
Shipping Info:
| Ship weight (kg) | 0.03 |
| Ship height (cm) | 2.8 |
| Ship length (cm) | 2.8 |
| Ship width (cm) | 0.9 |
| Country of Origin | CN |
Product Variants
| Model | Closure | Bore Dia. | Ring Material | Outside Dia. | Outer Ring Width | Cage Material | Retaining Ring Groove | Static Load Capacity | Price | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1657 ZZ PRX | Double Shielded | 1 1/4" | Alloy Steel | 2.562" | 0.687" | Steel | No | 2251 lbs. | €21.42 | |
| SSRI1038 ZZ SRL | Double Shielded | 3/8" | Stainless Steel | 5/8" | 0.156" | Stainless Steel | No | 53 lbf. | €20.58 | |
| SSRI1212 ZZ SRL | Double Shielded | 1/2" | Stainless Steel | 3/4" | 0.156" | - | No | 66 lbf. | €20.58 | |
| SSRI614 ZZ SRL | Double Shielded | 1/4" | Stainless Steel | 3/8" | 1/8" | - | No | 20 lbf. | €11.09 | |
| SSRI8516 ZZ SRL | Double Shielded | 0.312" | Stainless Steel | 1/2" | 0.156" | - | No | 40 lbf. | €12.12 | |
| RI814 ZZ PRX | Double Shielded | 1/4" | Alloy Steel | 1/2" | 0.187" | Stainless Steel | No | 40 lbf. | €10.14 | |
| SSRI814 ZZ SRL | Double Shielded | 1/4" | Stainless Steel | 1/2" | 0.187" | - | No | 40 lbf. | €11.57 |
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TRITAN 638 2RS PRX Miniature Ball Bearing, 638, Dbl Sealed, Contact Seal, 8 mm Bore, 28 mm OD
€39.01 /unit


