Shot peening is the process of cold working or hammering the surface of a material with steel shot at relatively high velocities. These shot particles create a series of overlapping dimples on the material’s surface which improves the fatigue strength or working life of the material.
Typical products which require shot peening are:
- Transmission gears, axles, universal joints, and drive shafts
- Connecting rods and crankshafts
- Pistons, cylinder heads and blocks
- Turbine engine disks, blades and shafts
- Aircraft wing skins, stringers and chords
- Landing gears
- Fillets
- Wheels
- Valves
- Springs