Aluminum Cnc Machining Spare Parts

Powder coating

Powder coating refers to adding a thin layer of protective polymer on the surface of parts. Powder coating is a robust, wear-resistant surface treatment that is compatible with all metal materials. Combined with sandblasting, parts with smooth and uniform surfaces and excellent corrosion resistance can be manufactured.

The powder coating process is similar to spray painting. These parts are first coated with an optional phosphating or chromate coating to increase their corrosion resistance, then coated with dry powder using an electrostatic "spray" gun and cured at high temperatures ( usually in an oven at 200 degrees Celsius ).

Multilayers can be applied to form a thicker coating with typical thicknesses ranging from about 18 μm to 72 μm. There are many colors to choose from.

What Is Engineering Tolerance?
Engineering Tolerances

Assume that we are machining a 100 mm metal rod. Even if we intend to machine all the bars into the same shape and size, we won't end up with exactly 100mm. The reason is that the bars' size and course cannot allow it. Though the plan and fabrication sites work towards lowering such changes, they still can't reduce them to zero.

The change in size and shape may rise or fall with the target value at the center. Therefore, we determine the acceptable upper limit and the lower acceptable limit relative to the target size depending on the use of the metal bar. We refer to the variation between these two values as 'tolerance'.

Engineering tolerance is the acceptable variation in the dimension of parts that arises during processing. Despite allowing the variation, the product can still perform the intended task. Part aspects that are within the allowed tolerance range thus qualify. Common engineering tolerances include dimension tolerance, position tolerance, and shape tolerance.