Determine the concept of Shrink-fitting of metal tyres
Shrink-fitting of metal tyres on the wheels of bullock carts is well known. As the hot metal tyre rings cool down, they are not able to regain their original size due to the wooden wheels. Consequently, wooden wheel parts remain together. The similar concept was used in the older times in wooden barrel construction by fitting of metal bands forcefully. Another example is the use of rubber bands to contain a sweet box. The sweet box keeps the rubber band in a stretched state and the rubber band consequently applies compression on the sweet box to keep it closed.