Fabrication


Metal Finishing

3M Scotch-BriteTM Hand Pads

NumberColorAbrasiveGrit Equiv.Steel Wool Equiv.Description
7445
Light Duty Cleansing
White Flint, super fine grade 1200-1500   Excellent for fine finishes, light cleaning. One of the least aggressive hand pads. Less
Aggressive
Finer
Finish

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More
Aggressive
Coarser
Finish
7448
Ultra Fine
Light Gray Silicon Carbide, ultra fine grade 800-1000 #0000 Finest silicon carbide hand pad available. Excellent for final finishing and light cleaning.
6448
Light Duty
Dark Gray Silicon Carbide, ultra fine grade     Designed to clean, finish and buff.
7447
General Purpose
Maroon Aluminum Oxide, very fine grade 360-400 #00 - #000 Excellent starting point to clean, finish, grain, denib or defuzz.
8447
Production
Maroon Aluminum Oxide, very fine grade 360-400 #00 - #000 Provides most uniform finish. Excellent for use to clean, finish, grain, denib and defuzz.
6444
Extra Duty
Brown Aluminum Oxide, fine grade     Excellent for conformability in cleaning, finishing and graining. Also may be used to denib or defuzz.
7446
Blending
Gray Silicon Carbide, medium grade 120-150 #1 - #2 Excellent to grain, clean, denib, defuzz and finish. Resistant to loading.
7440
Heavy Duty
Tan Aluminum Oxide, medium grade     The most aggressive and durable web. Excellent for heavy cleaning, deburring, and finishing.
5440
Ultra Heavy Duty
Brown Aluminum Oxide, coarse grade     Resistant to loading. Does not contaminate. Excellent for cleaning scale or corrosion.


AbrasiveFinish (micro-inch)Grit Equiv.Steel Wool Equiv.
MaterialGradeAluminumStainless Steel
Silicon Carbide Super Fine 8-12 4-6 320-600 #00 - #000
Aluminum Oxide Very Fine 16-35 6-12 220-320 #0
Aluminum Oxide Medium 80-100 32-40 150-180 #1 or #2
Aluminum Oxide Coarse 130-150 62-72 80-150  


Brushed (or Grained) Aluminum Finish

Using a belt sander with a 320 or a 160 grit belt, sand the aluminum part in one direction only (preferably with the tool marks) using light, even pressure. The graining may be softened with a hand pad. Handle the brushed parts very carefully until they are anodized as they mark easily.


Notes

1 micro-inch  =  0.000001 inch


Other Resources


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DISCLAIMER

Page author: Dawn Rorvik (rorvikd@evergreen.edu)
Last modified: 10/02/2003