Nylatron(R) GS Rod

Nylatron(R) GS is extruded nylon 6/6 filled with molybdenum disulphide - extruded and type 6/6, not cast nylon 6, which is a common mix-up and matters because the two differ by 80F in melting point. The MoS2 raises load-bearing capacity and drops dynamic friction against steel to 0.20, lifting the published limiting PV to 3,000 psi-ft/min with a wear factor of 90 x 10^-10. Tensile strength is 12,500 psi on a 480,000 psi modulus, flexural strength 17,000 psi, compressive strength 16,000 psi at 10% deflection and hardness Rockwell M85 (R115).

Its distinguishing property is dimensional rather than mechanical: coefficient of thermal expansion is 40 microinch/in/F, the lowest of any nylon, and 24-hour water absorption is 0.30%, so machined components keep their fits and clearances better than the alternatives. It is specified for bushings, bearings, roller wheels, pulleys, sheaves, wear pads and valve seats in construction and heavy equipment. Melting point is 500F and continuous service 220F. Two cautions: notched impact is 0.500 ft-lb/in, below the unfilled grade, and no FDA, NSF, USDA or 3A compliance is published, so it does not belong in food contact. Dark grey is the only colour.