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Liquid Nitriding

Liquid nitriding is a subcritical surface enhancement process with one of the longest track records of success of any case hardening technology.

PVD Coatings

PVD coatings involve the deposition of thin (2-10 microns; 0.0001" – 0.0004") films on the surface of tools and components.

Engineered Bushings

HEF bushings are recognized worldwide for their excellent frictional and anti-seizure properties, and ability to withstand high loads.

CERTESS® DT DLC Coating

CERTESS ® DT Physical Vapor Deposition PVD Coating

CERTESS DT is an excellent coating for precision
wear components and decorative + functional
finishes on armaments.

CERTESS DT is a lubricious multilayer coating applied by a combination of PVD and PECVD (plasma-enhanced chemical vapor deposition), utilizing HEF's proprietary CAM technology. This coating is a metal (tungsten) doped amorphous carbon-hydrogen coating. The layers are deposited with no significant effect on surface geometry or part dimensions.

CERTESS DT films are tribological coatings that are ideally suited for applications that require a moderate degree of abrasion resistance, reduced adhesive wear (anti-seizure & anti-scuffing properties) coupled with friction reduction – medium load gears, roller bearings, molds & dies, dry or semi-dry punching & forming, armaments. Temperature resistance is up to 300°C. Deposited films are 2 to 4 μm, tailored to the application; hardness ranges from 1200 to 1400 HV and Young's modulus in the range of 120-130 GPa.