Examples involving radii and holes

For each example, project five views in first angle projection, taking the view in the direction of the arrow A as the front view. Hidden detail is required in the solutions to these problems, and note that in some cases the position of some of the holes will be found to coincide with centre lines. Where this occurs the dotted line should take priority. Take each side of the grid triangle to be 10 mm in length.

If only three views of each component were required, which ones would you choose? The professional draughtsman would select a front view, end view and plan view with the least number of dotted lines. Study your solutions carefully and where an ideal choice exists, box this solution with a thin chain line. In some cases more than one choice can be made and these are indicated in the solutions.

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