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Design of Shaft

Design of Shaft. Shaft Design Procedure. Determine rpm of shaft Determine power or torque Determine part mounted on shaft (gears, belts…) Determine location of bearing Determine location of (key, fillets …). Shaft Design Procedure (Cont’d). Draw torque diagram Determine forces on shaft

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Design of Shaft

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  1. Design of Shaft

  2. Shaft Design Procedure • Determine rpm of shaft • Determine power or torque • Determine part mounted on shaft (gears, belts…) • Determine location of bearing • Determine location of (key, fillets …)

  3. Shaft Design Procedure (Cont’d) • Draw torque diagram • Determine forces on shaft • Resolve components of forces in horizontal & vertical plan • Solve the reaction on bearing • Produce S.F. Diagram & B.M. diagram

  4. Shaft Design Procedure (Cont’d) • Select material and specify its condition (Suggested material is : AISI 1040, 4140, 4340, 4640, 5150, 6150, and 8650). Then determine • Determine appropriate design stress, considering the manner of loading (smooth, shock…) • Analyze each critical point of shaft then decide which point is safer • Specify the final dimensions

  5. Forces exerted on shafts

  6. Forces exerted on shafts

  7. Helical Gears

  8. Bevel Gears

  9. Bevel Gears

  10. Chain Sprocket

  11. V-Belt sheaves

  12. Flat-Belt sheaves Stress Concentration in Shafts

  13. When shaft designed according to strength the following cases can be considered: • Shaft subjected to bending only (Axle) • Shaft subjected to torsion only

  14. Shaft subjected to torsion & bending

  15. Shaft subjected to torsion, bending and axial load

  16. For Hollow shaft and combined factors

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