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What does “break all sharp edges and remove all burrs” mean?

“Break all sharp edges and remove all burrs,” is a common drawing note used to notify the manufacturer that the sharp edges and burrs produced by the manufacturing process must be removed from the part. A burr is displaced material, typically generated through machining, that hangs on to the finished part.

What is an example of a break edge?

This is an example of a break edge. There is no GD&T symbol for a break edge. Break edges are also not referenced in the engineering drawing standard ASME Y14.5. Break edge callouts are specified directly on the drawing to reference a certain surface or as a note e.g. “Break all sharp edges”.

How do I remove sharp edges & burrs from a drawing?

You may indicate to break a specific edge by adding a note with a leader line pointing to the edge that you want broken. However, to require all sharp edges and burrs to be removed from your part, you would add a note to your drawing like the one shown in Figure 2. Figure 2: Drawing Note for Removing Sharp Edges and Burrs

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