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topic 427

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 edge

Jeff 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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