Koyo BK4020 drawn cup needle roller bearing
Koyo BK4020 drawn cup needle roller bearing: roller bore diameter Fw 40 mm, outside diameter D 47 mm, width 20 mm; cross-references: IKO TLAM4020, INA BK4020.
Figure © Koyo, clipped unaltered from Koyo Ball & Roller Bearings catalog B2001E-6 — Standard Bearings section (B2001E-6b). It illustrates the product family printed there, which may include other sizes. Removed on request.
Specifications
| Roller bore diameter Fw | 40 mm |
|---|---|
| Outside diameter D | 47 mm |
| Width | 20 mm |
| Basic dynamic load rating Cr | 25.1 kN |
| Shaft diameter | 40 mm |
| Basic static load rating C0r | 50.4 kN |
| Limiting speed, grease lubrication | 5200 min-1 |
| Limiting speed, oil lubrication | 7900 min-1 |
| Mass | 0.070 kg |
| Product type | Drawn cup needle roller bearings, metric series |
All specifications: Verifiedprinted in Koyo’s own catalogue
Cross-references
| Part | Manufacturer | Relationship | Evidence | |
|---|---|---|---|---|
| TLAM4020 | IKO | Dimensional interchange | Single sourcestated by Koyo; not corroborated | |
| BK4020 | INA | Dimensional interchange | Single sourcestated by Koyo; not corroborated | |
Koyo: 'Dimensional interchangeability only. This does not imply interchangeable in all respects.' (Metric NRB Interchange Guide p18)
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