bicycle bearing 39.7x50.8x8.0mm 397508 2RS MAX headset replacement bearing repair bearing
Technical Details
| Ball Material: | Stainless steel |
| Brand Name: | FREERUN |
| Cage/Retainer type: | Crown retainer or Ribbon Retainer |
| Coatings: | STEEL |
| Material: | Steel |
| Model Number: | 397508 |
| Number of Row: | Single Row |
| Oil Lubrication: | Shell Oil#12 and SRL Greased |
| Precision Rating: | ABEC-3 |
| Quality-standard of balls: | G10 as DIN 5401, ISO 3 290 |
| Rings' Material: | Chrome steel |
| RoHs: | We are complying 100% with the EU Directives for RoHS and WEEE |
| Structure: | Deep groove ball |
| Surface Roughness: | Ra 0.05 |
| Type: | Ball |
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