How is brushed finish before anodizing done?
We manufacture small aluminum enclosures and chassis for electronic equipment. We would like to have a brushed finish prior to anodizing. We have called every metal finisher we can find, but no one has provided an answer.
I think it's done with carbide brushes or a drum sander. Can anyone help?Ron Laury
The Electronic Workshop
As I recall from a sheet metal shop in a company that I used to work at, a large belt sanding type machine that resembles a wood planar was used to give a brushed finish to all flat stock. It also served to "plane" the metal down to a specific thickness. After this mechanical process, any punching, cutting, or bending ops would be performed. I don't recall any full sealed box forms being produced; mostly 19" rack panels (some had wrapped mounting flanges but none were sealed edgeJeff Albom
- El Granada, California
there are several ways brush finishes can be applied depending on the equipment used. there are buffing lathes that can be purchased using a variety of wheels or contact wheels with belts. if there are recessed area's there are a number of hand held tools that can be used. there are many types of abrasives on the market I would suggest calling a 3-m distributor they should be willing to help.Kent Glover
We manufacture custom wall plates and equipment rack panels using the finish you described. The name used to refer the process producing a linear grain "brushed" appearance is "Time Saving". Jeff Albom's description is great. You will have a choice as to the grit of the belt used. We job out all of our "Time Saving". Try contacting machine shops first. Good Luck.Jon Conger
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