Part of the metal, not a coating on top
Anodizing converts the surface of aluminum into a hard, integral oxide layer that is part of the metal itself. The result resists corrosion, accepts dye for consistent color, and adds meaningful hardness without building up significant thickness on critical features. We coordinate anodizing through our trusted finishing partner NorTex Metal Finishing — your machined parts arrive complete and ready to assemble.
Type II vs. Type III
Type II (sulfuric acid anodize) is the standard commercial process — a thinner oxide layer that accepts dye and paint well. The right choice when color consistency, paint adhesion, or moderate corrosion protection is the goal. Type III (hard anodize) is thicker, denser, and significantly harder — built for parts that face abrasion, wear, or aggressive environments. Both are available in clear and black.
- Type II — commercial anodize, excellent color and paint-adhesion properties
- Type III — hard anodize, exceptional abrasion and wear resistance
- Clear (natural) and black color options
- Post-anodize Teflon / PTFE impregnation for added lubricity
Dimensional impact you can plan for
Because the oxide grows into the surface, the impact is predictable — roughly 0.0001" per side for Type II and up to 0.001" per side for Type III. When tight-tolerance bores or mating features must be held after anodize, we factor it in at the machining stage. Anodizing pairs naturally with our aluminum CNC machining; for conductive aluminum surfaces, see chem film.