Safety First!

Machining can be very dangerous. Sometimes parts can be ripped out of a vise during drilling or milling, and cause significant damage. This is why CNC machines typically have safety glass on the front doors, and most newer machines by will not run with the doors open by default. At Mecha, we mill parts as…

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Do Plating and Painting Thicknesses Matter?

The dimensions on almost all drawings for machined components are assumed to be after plating. However, plating thicknesses generally only matter when machining parts with tight tolerances (<0.001″). Most plating processes only add a couple tenths or less (<0.0002″) of thickness per side. This includes chromate conversion, Type II anodizing, and electroless nickel plating. Measuring…

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Anodizing Thicknesses

This is a bit of an oversimplification, but when a part gets anodized, the anodize layer forms halfway into and halfway above the original surface.  So if a drawing calls for 0.002″ of anodizing, then the part will “grow” in size by 0.001″ per side of the part.  For example, if a raw part is…

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Deburring and Edge-Breaking

Deburring is the process of removing extraneous material leftover from machining. This material is not considered part of the design and cause a variety of issues if they come loose later. Issues may include plating voids, cosmetic paint imperfections, mechanical damage, or electrical shorts in some products. Burrs must be removed manually using various hand…

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