material: Standard Locknut LLC SR 20-17 Stabilizing Rings
| Place of Origin |
USA |
| Brand Name |
Standard Locknut LLC |
| Certification |
CO CQ |
| Model Number |
SR 20-17 |
| Min.Order Quantity |
1SET |
| Price |
Check with us |
| Packaging Details |
Original Packing |
| Delivery Time |
Within 5 days |
| Payment Terms |
MoneyGram,Western Union,T/T |
Product Features
Standard Locknut LLC SR 20-17 bearing Size Chart (mm/inches) |
|---|
| Bearing number | 71903 CD/HCP4A |
| Size (mm) | 30x17x7 |
| Bore Diameter (mm) | 30 |
| Outer Diameter (mm) | 17 |
| Width (mm) | 7 |
| d | 17 mm |
| D | 30 mm |
| B | 7 mm |
| d1 | 20.9 mm |
| d2 | 20.9 mm |
| D1 | 25.7 mm |
| r1,2 - min. | 0.3 mm |
| r3,4 - min. | 0.2 mm |
| a | 6.7 mm |
| da - min. | 19 mm |
| db - min. | 19 mm |
| Da - max. | 28 mm |
| Db - max. | 28.6 mm |
| ra - max. | 0.3 mm |
| rb - max. | 0.2 mm |
| dn | 22.1 mm |
| Basic dynamic load rating - C | 4.2 kN |
| Basic static load rating - C0 | 2.1 kN |
| Fatigue load limit - Pu | 0.088 kN |
| Limiting speed for grease lubrication | 63000 r/min |
| Limiting speed for oil lubrication | 90000 mm/min |
| Ball - Dw | 3.969 mm |
| Ball - z | 14 |
| Gref | 0.24 cm3 |
| Calculation factor - f0 | 9.8 |
| Preload class A - GA | 15 N |
| Preload class B - GB | 30 N |
| Preload class C - GC | 60 N |
| Preload class D - GD | 120 N |
| Calculation factor - f | 1.05 |
| Calculation factor - f | 1 |
| Calculation factor - f2A | 1 |
| Calculation factor - f2B | 1.07 |
| Calculation factor - f2C | 1.12 |
| Calculation factor - f2D | 1.18 |
| Calculation factor - fHC | 1.04 |
| Preload class A | 18 N/micron |
| Preload class B | 24 N/micron |
| Preload class C | 34 N/micron |
| Preload class D | 47 N/micron |
| d1 | 20.9 mm |
| d2 | 20.9 mm |
| D1 | 25.7 mm |
| r1,2 min. | 0.3 mm |
| r3,4 min. | 0.2 mm |
| da min. | 19 mm |
| db min. | 19 mm |
| Da max. | 28 mm |
| Db max. | 28.6 mm |
| ra max. | 0.3 mm |
| rb max. | 0.2 mm |
| dn | 22.1 mm |
| Basic dynamic load rating C | 4.16 kN |
| Basic static load rating C0 | 2.08 kN |
| Fatigue load limit Pu | 0.088 kN |
| Attainable speed for grease lubrication | 63000 r/min |
| Attainable speed for oil-air lubrication | 90000 r/min |
| Ball diameter Dw | 3.969 mm |
| Number of balls z | 14 |
| Reference grease quantity Gref | 0.24 cm³ |
| Preload class A GA | 15 N |
| Static axial stiffness, preload class A | 18 N/µm |
| Preload class B GB | 30 N |
| Static axial stiffness, preload class B | 24 N/µm |
| Preload class C GC | 60 N |
| Static axial stiffness, preload class C | 34 N/µm |
| Preload class D GD | 120 N |
| Static axial stiffness, preload class D | 47 N/µm |
| Calculation factor f | 1.05 |
| Calculation factor f1 | 1 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.07 |
| Calculation factor f2C | 1.12 |
| Calculation factor f2D | 1.18 |
| Calculation factor fHC | 1.04 |
| Calculation factor f0 | 9.8 |
| Mass bearing | 0.015 kg |