Shafting - Plating and Coating

The Thomson standard chrome option is pure chrome with a thickness of .00005” - .0001”. (Process per AMS 2460, Class 1 (Corrosion Protective Plating), Type II (Satin finish), but with no nickel underlayer. Other plating options are available for quote, including but not limited to Thin Dense Chrome plating per MIL-S-13165 and MIL-R-81841.

Note: Our Chrome Plated with Plain Ends (CPPE) shafts do not have coaxial holes in any length, but the chamfered edges and cut ends are not plated.

The benefits of black oxide is corrosion resistance and black color. The Thomson standard black oxide option meets MIL-DTL-13924D Class 1.

The benefits of Armoloy plating are a 78 RC surface finish, reduction of wear and friction in moving parts, and absolute adhesion to base metal (no chipping, cracking, flaking or peeling will occur). The Armoloy thickness is .0001”. Final plated shaft is within specified tolerance class. Specifications typically satisfied with Armoloy plating are AMS-2438, AMS QQ-C-320 and AMS-2406.

As a result of the plating process and the need to hold parts during plating, coaxial holes may be added as follows: