Nylon 6/6 MoS2 Rod

Molybdenum disulphide worked through extruded nylon 6/6 turns a general-purpose machining stock into a bearing grade. The finely divided MoS2 raises load-bearing capacity and drops the dynamic coefficient of friction against steel from 0.25 to 0.20, lifting the published limiting PV from 2,700 to 3,000 psi-ft/min and improving the wear factor to 90 x 10^-10. It also stiffens the material: 12,500 psi tensile strength, 17,000 psi flexural strength, 16,000 psi compressive strength at 10% deflection and Rockwell M85 (R115), all above the unfilled grade.

The quieter advantage is dimensional. Coefficient of thermal expansion falls to 40 microinch/in/F, the lowest in the nylon range, and 24-hour water absorption sits at 0.30%, so machined parts hold their fits and clearances better than any other nylon here. 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 things to know: notched impact drops to 0.500 ft-lb/in against the unfilled grade, and the MoS2 grades carry no FDA, NSF, USDA or 3A compliance at all, so keep them out of food contact. Dark grey is the only colour, and it looks identical to the cast MoS2 grade - label the rack.