Performance Specifications

Materials

Aluminum

Hardkote-anodized aluminum (left);
Clear-anodized (right)

6061-T6: An aluminum alloy that has excellent corrosion resistance to air and salt water. It is an easily-welded tough alloy that responds well to anodizing.

Hardkote-anodized:Hardcoat aluminum anodizing is an electrochemical process that produces a corrosion-resistant finish with hardness characteristics second only to diamonds. Harken’s hardcoating process, “Hardkote,” is twice as thick as black anodization to provide extra protection against scratches, dents, superficial deformation, and corrosion.

Clear-anodized (or Clear-coat anodized): Clear aluminum anodizing is an electrochemical process that produces a corrosion-resistant finish. It also hardens the surface, making components less prone to scratches and dents. It is “clear” because the protective layer isn’t thick enough to change the color of the component (though dye can be added). More rigorous anodization, such as black-anodized or Hardkote, can give components a black or colored hue.

Teflon®-impregnated: Teflon® impregnation, along with anodization, protects aluminum against corrosion by sealing the surface from moisture. It also minimizes friction and gives the component better wear resistance.

Stainless Steel

316: Nonhardenable. High corrosion resistance to freshwater and saltwater. Molybdenum provides resistance to pitting and crevice corrosion in chloride environments. Excellent in range of atmospheric environments and corrosive media. Subject to some pitting and brown staining in crevices and on pieces with rough finishes.

17-4PH: Hardenable to extremely high strengths with heat treatment. More corrosion-resistant than any other standard hardenable stainless steel.

Titanium

Titanium metal and its alloys are light in weight with very high tensile strength. Titanium is almost completely rustproof and has outstanding resistance to corrosion from salt water.

Composites

Torlon®: Exceptionally strong crush/impact-resistant bearing material that withstands heavy long-term use and shock loading. Torlon is greenish brown in color. All Harken hardware that sees extreme loads (except 16 mm pulleys) uses Torlon bearings. All roller bearings are Torlon.

Delrin®: Well suited for low- to moderate-load applications. Black or (in older-model pulleys) white. Delrin is used in ball bearings, sheaves, and pulley sideplates. Delrin sideplates are often reinforced by stainless straps.

Testing Procedures

If your project requires CE certification we are happy to work with you to have the product certified for your application.