Hertzian Contact Apparatus

Bench top experiment for demonstrating Hertzian contact
Dynamo meter spring balance
Sliding device for spring balance to allow continuously adjustable contact force
Pressure pad made of silicone rubber
Sturdy metal chassis with rubber feet
Transparent plastic pressure plate
Optimal illumination of the contact area using halogen light from the side.

Spring balance
0...25N, graduations: 0.5N
Halogen lamp
Power: 20W
Voltage: 12V.
Pressure pad: 60 Shore.