A pulley is designed to fit on a 90mm diameter shaft with a medium drive fit.
After a design review it is decided that a more positive drive transfer mechanism is required and a rectangular key is added.
This results in a fit between the hole in the pulley and the shaft being changed to a close running fit.
a) Explain the changes in the tolerance of both shaft and hole, and give an
indication of what this means to the manufacture of the parts.
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