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Guidelines to Prepare Engineering Drawings

Sathish Kumar
24/01/2022 0 0

GUIDELINES:

• Follow the angle of Projection.
• Not necessary to provide 3-views, if two views are sufficient to cover all details
• The orientation of the parts shall be shown inline concerning actual assembly.
• Extension lines of one dimension shall not cross the other dimension.
• Dimension lines shall be shown in line with the dimensions shown in the base view.
• No repetition of dimension.
• Typical dimensions (Typ.), applicable only for symmetrical parts about any axis.
• Avoid redundant dimensions; if unavoidable, use REF.
• Diameter dimensions shall always be shown with the view, where the entire circularity is seen.
• If the part has many numbers of holes, then it is good to show with notations like ax5 (a type hole 5 Nos)
• Critical dimensions are shown with **
• Theoretical exact dimensions shall be enclosed with a rectangular border.
• Slot dimension shall be marked with outer size in the order of the X and Y-axis direction. Ex: Slot 50x10 mean slot whose external dimension of 50mm lengthwise and 10mm along the Y-axis
• Leave a standard gap of 1.5mm between part and dimension lines.
• Use the appropriate feature frame.
• Blank development, if any, shall be shown so that the user can easily interpret it.
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