Nylon 6/6 (Polyamide)

Nylon 6/6 is the extrusion grade of the Nylon family of solid polymer shapes. It has been commercially available since 1948; developed by Dupont.  Nylon is well known for excellent toughness, low coefficient of friction and good abrasion resistance making it an ideal replacement for a wide variety of materials from metal to rubber. Using Nylon 6/6 reduces lubrication requirements, eliminates galling, and corrosion.  Low cost combined with improved wear resistance makes Nylon 6/6 an excellent choice for many bearing and wear components.

Nylon 6/6 is easily fabricated into precision parts using standard metalworking equipment. Tolerances of +/-.002 are easily achieved with experience.  It is available in a broad variety of shapes and sizes. Rod stock normally comes ground to size making turning easier.  Both extruded and cast grades of nylon are available with a variety of fillers to meet specific application demands.

Several manufacturers offer varying grades and filled versions thereof by the names of Tecamid® and Nylatron®commercially available to accommodate specific applications. Solid lubricants such as mineral oil, , graphite, PTFE, and MoS2 provide lower friction, while reinforcing agent such as carbon fiber, Kevlar®, and glass provide higher levels of strength and dimensional stability.

Specification Test Value Units
Specific Gravity, 73°F D792 1.15
Tensile Strength @ Yield, 73°F D638 12,000 psi
Tensile Modulus of Elasticity, 73°F D638 425,000 psi
Tensile Elongation (at break), 73°F D638 50 %
Flexural Strength, 73°F D790 15,000 psi
Flexural Modulus of Elasticity D790 450,000 psi
Shear Strength, 73°F D732 10,000 psi
Compressive Strength – Ultimate 300 psi
Compressive Strength at 2% Deformation D695 300 psi
Compressive Strength at 10% Deformation D695 8,000 psi
Deformation Under Load %
Compressive Modulus of Elasticity, 73°F D695 420,000
Compressive Strength ⊥ to Laminate (Modulus) psi
Compressive Strength ⊥ to Laminate (Yield) 1,000 psi
Compressive Strength ⊥ to Laminate (Ultimate) 1,000 psi
Hardness, Durometer (Shore “D” scale) D2240 D80
Hardness, Rockwell (Scale as noted) D785  115 Rockwell R
Izod Impact, Notched @ 73°F D256 Type A 0.6 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007 0.3
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007 0.25
Maximum Static Bearing Load (P) PTM55007 300 psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007 60 ft/minute
Maximum Limiting PV (Unlubricated) PTM55007 2,700 psi x ft/min.
Wear Factor “K” x 10-10 PTM55010 80 Cubic in.-min/ft.lbs.hr
Sand Wheel Wear/Abrasion Test 75 UHMW=100
Minimum Mating Surface Hardness 20 Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA) 5.50 in/in/°F x 10-5
Coefficient of Thermal Expansion // to Laminates E-831(TMA) 5.50 in/in/°F x 10-5
Coefficient of Thermal Expansion I to Laminates E-831(TMA) 5.50 in/in/°F x 10-5
Softening Point 200 °F
Heat Deflection Temperature 264 psi D648 200 °F
Embrittlement Temperature °F Min.
Continuous Service Temperature in Air 210 °F Max.
Short Term Service Temperature 210 °F Max.
Tg-Glass Transition (Amorphous) D3418 °F
Melting Point (Crystalline) Peak D3418 500 °F
Thermal Conductivity F433 1.7 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149 400 Volts/mil
Surface Resistivity D257 >1013 ohm/cm
Volume Resistivity D257 ohm/cm
Dielectric Constant, 106 Hz D150 3.6
Dissipation Factor, 106 Hz D150 0.02
Flammability @ 3.1mm(1/8 in.) UL94 UL94 V-2
Arc Resistance seconds
Water Absorption, Immersion 24 Hours D570 (2) 0.3 %
Water Absorption, Immersion Saturation D570 (2) 7.0 %
Machinability Rating 2 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)  .25 6.0 inches
Sheet Thickness Availability (Off the Shelf)  .125 3.0 inches
Characteristics / Attributes Excellent Toughness / Easily Machined / Low Cost