How iron ring is fixed to a cart wheel?
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The wooden wheel is slightly larger than the steel rim. Heating the steel rim causes it to expand enough to fit over the wooden wheel easily. The steel rim is then cooled rapidly and it contracts to fit the wheel tightly and hold everything together without nails or screws.
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Iron ring is heated first, it expands . It will be placed around the wheel . When iron ring is cooled it will contract and fixes to the wheel
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