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DRY Film Lubricants

“Dry Film Lubricants”, (DFLs) also called solid film lubricants (SFLs), are:

  1. Materials with inherent lubricant properties.
  2. Firmly bonded to the surface of a substrate.
  3. Applied in the liquid state, generally by spray, tumble coater, or bath immersion.
Dry Film Lubricants

Unlike wet lubricants, i.e. oil, grease that stay ‘wet’ while on the part, dry film lubricants go on wet, but then dry on the part it has been applied to. Particles do not stick to dry lube. Dry lube does not require any maintenance like wet lube. DFLs can be powder or liquid coatings such as PTFE, Xylan®, Epoxy, Polyester or Urethane.

The range of coatings includes environmentally friendly and REACH compliant coatings, as well as air cured, high temperature and PTFE. Among the solid film lubricants coatings we offer are Everlube®, Microseal®, Lube-Lok®, Lubri-Bond®, Ecoalube®, Ever-Slik®, Esnalube™, Perma-Slik®, Electrobond®, Flurene® , Formkote® and Henco-Mask™.

Dry film lubricants are made up of a combination of resin binders and lubricating pigments. The resin holds the lubricating pigment in place so that a layer interposes between the rubbing surfaces. As the surfaces move, the coating prevents direct contact of the substrate materials.
DFLs create a “Slippery” Factor

Without SFL
Fretting and galling of the substrate


With SFL
Protective layer created between substrates

Dry Film Lubricants

Dry Film Lubricants - Brands

  • Everlube® (H3)
  • Microseal®
  • Lube-Lok®
  • Lubri-Bond®
  • Ecoalube®
  • Ever-Slik®
  • Esnalube™
  • Perma-Slik®
  • Electrobond®
  • Flurene®
  • Formkote®
  • Henco-Mask™

Dry Film Lubricants - Environmental Factors

Solid Film Lubricants excel in:
  • High load applications
  • Applications where a very low coefficient of friction is desired
  • High-temperature environments
  • Chemical and corrosionDelays or prevents corrosion
    Abrasion resistance / reduced wearWithstands loads in excess of 250 ksi
    FrictionReduces coefficient of friction
    LubricationDoes not attract containments like “wet lubes”
    No maintenance required
    Water Based CoatingsLower VOCs, easy to apply
    TemperatureFrom -395ºF (-237ºC) to over 2000ºF (1093ºC)

    Dry Film Lubricants- Product Applications

    Fasteners: Torque/tension control, anti-galling, corrosion resistance
    Couplings: Lubrication, anti-seize, chemical & corrosion resistance
    Valves: Chemical & abrasion resistance, anti-seize
    Pumps: Break-in lubrication, wear-life extension, chemical resistance
    Gears: Close tolerance, precision gear lubrication, break-in lubrication
    Bearings – Operation in vacuum or dirty environment, temperature extremes
    Turbines: Turbine blade root sections and disk slots to aid in assembly, disassembly and reduces fretting and galling.
    Firearms: Wear resistance, protection against corrosion, durability, lubricity, and decreased friction.

    Dry Film Lubricants - Main Categories

    Crystalline Lattice (lamella) Type Structures

    The shear forces between the layers are weak,  which results in increased lubricity between the sliding surfaces.

    • Molybdenum Disulfide (MoS2)
    • Tungsten Disulfide (WS2)

    Graphite and Fluorocarbons

    PTFE is a white, opaque synthetic fluoropolymer that provides lubrication in continuous use up to 260oC (500oF). The fluorocarbon molecule is structured such that the fluorine atoms surrounding the carbon atoms prevent any other atoms from getting near the carbon, Prohibiting any further reaction. For this reason, PTFE is very unreactive which causes it to have a very low coefficient of friction and allows things to slide across its surface very easily.

    Dry Film Lubricants - Benefits

    The key factors for PTFE dry film lubricant coatings are:
  • Flexible
  • Chemically resistant
  • Non-stick characteristics
  • Electrically resistant
  • Very low coefficient of friction, especially in lower load carrying applications
  • Improve chemical resistance to attack, abrasion and corrosion.
  • Enhance performance of the material:
    • corrosion protection
    • wear resistance
    • electrical insulation
    • electromagnetic shielding
    • chemical agent resistance.
  • Selecting the Correct Dry Film Lubricant

    What properties are desiredWhat is the environment
    Load carrying capacity Temperature
    Low coefficient of frictionHigh vacuum
    Corrosion resistanceMoisture / Humidity
    Electrical propertiesPresence of oxygen
    Radiation

    Dry Film Lubricants - Types

    propertiesMolybdenum DisulfideGraphitePTFE
    Load carrying capacity >250 ksi<50 ksi<20 ksi
    Coefficient of friction0.04-0.080.04-0.100.02-0.04
    Affect of moistureNegativePositiveNone
    Electrical conductivityNot conductiveConductiveNot conductive
    Max operating temp in air750F1200F500F
    Operation in fluids /lubesBreak-in onlyBreak-in onlyYes
    Key strengthHigh loads, operates in vacuum and cryogenic environmentsModerate loads, high operating temp., electrically conductiveDoes not lubricate sacrificially, clean environments, coatings can be decorative

    Smaller electronic components are particularly susceptible to damage or failure due to electrostatic discharge. EMI/RFI shielding blocks unwanted external and/or internal electromagnetic waves from emitting and interfering with other circuits or devices.

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