Nyloil(R) FG Rod

Nyloil(R) FG is the food-grade oil-filled cast nylon: the same self-lubricating cast nylon 6 construction, in natural rather than the standard green, formulated and certified for direct contact with food. It carries FDA and USDA 3A compliance, which standard green oil-filled cast nylon does not - the two are not interchangeable, and that is the single most important thing to get right when specifying. Published properties are those of the Nyloil grade, as the manufacturer does not issue a separate FG property table: 9,500 to 11,000 psi tensile strength, 14,000 to 16,000 psi flexural strength on a 375,000 to 475,000 psi flexural modulus, 13,500 to 15,000 psi compressive strength, Rockwell R100 to R115 and Shore D74 to D80.

The 0.12 dynamic coefficient of friction against steel is the lowest of any nylon stocked here, and the published limiting PV is 16,000 psi-ft/min unlubricated on a thrust-washer test. That combination is why it ends up in food and dairy plants as bearings, bushings, wear strips, star wheels, guides and valve seats in wash-down and direct-contact service. Continuous service is 230F with intermittent excursions to 330F and the melting point is 430F. Limitations worth stating: it is among the weakest grades here, property ranges are genuinely wide because casting is a batch process, it still takes up 4 to 5% water at saturation, and the oil remains an oil - some plants will not accept it even with the approvals.