COMPRESSION SPRINGS

Mechanical Properties of some Spring Wires (0.0329 inch = 1 mm)

Formulas for the Dimensional characteristics of compression springs.

Largest Shear Stress

where

The Spring Rate

End-Condition Constants α for Helical Compression Springs Condition for absolute stability or Buckling criterion (Steel)

Solid Safe Criterionτ all ≤ Ssy

Maximum Allowable Torsional Stress for Helical Compression Springs in Static Application

BEARINGS

= application factor(1 Lb. = 4.448 N)

SPUR GEARS

,

, Where V is in ft/min, ‘n’ in rpm

, V = π d n / 60Wt = H/V Where V is in m/s, ‘n’ in rpm

Surface Compressive Stress (Hertzian Stress)

V-BELT

,

(Open Belt)

,

FLAT BELTS

, , ,

, (Open Belt)

, , , ,,

: :

CHAIN DRIVES

, , ,

,

,

AREA MOMENT METHOD

AREAS AND CETROIDAL DISTANCES FOR MOMENT DIAGRAM

POWER SCREWS

BOLTED AND RIVETED JOINTS LOADED IN SHEAR