Oil Filled Cast Nylon 6 Rod

Oil-filled cast nylon carries a lubricating oil dispersed through the polymer during casting, so it cannot spin out, dry out or drain out the way an applied lubricant does. The result is the lowest friction of any machinable nylon short of the food-grade variant: 0.14 dynamic against steel dry, a wear factor of 72 x 10^-10 and a published limiting PV of 6,000 psi-ft/min - double the unfilled cast grade. Tensile strength is 9,900 psi on a 465,000 psi modulus, flexural strength 15,000 psi on a 525,000 psi flexural modulus, compressive strength 13,500 psi at 10% deflection and hardness Rockwell M85 (R120).

It is the grade for bushings, bearings, gears, sprockets, wear rails and pads, pulleys, sheaves, conveyor wheels, rollers, feed screws and star wheels - anywhere a part has to run unlubricated because greasing it is impractical or unwelcome. Continuous service is 220F and the melting point 420F. Be clear about what you give up: this is the weakest of the cast grades, with tensile strength about 2,000 psi below plain cast nylon, and the oil does nothing for temperature - heat deflection at 264 psi is still 200F. It still takes up 6.0% water at saturation. And standard oil-filled cast nylon is not FDA compliant; the food-grade variant is a different, natural-coloured product.