Delrin® 100AF Blend Rod

Delrin® 100AF Blend is acetal homopolymer with 13% PTFE fiber dispersed through it, formulated specifically for unlubricated bearing duty. The PTFE fiber lowers the dynamic coefficient of friction to 0.182 dry against steel, while the homopolymer matrix keeps most of the strength of unfilled Delrin®: 7,100 psi tensile strength at yield, 350,000 psi tensile modulus, 10.3% elongation at yield and Rockwell M79 hardness. Heat deflection temperature is 244°F at 264 psi, long-term service is 185°F with 300°F intermittent, and moisture absorption is 0.12% in 24 hours.

It is used for bearings, bushings, thrust washers, cams, gears, slides and valve seats in conveyor systems, printing and packaging machinery, business machines, automotive assemblies and heavy industry, particularly where a bearing must carry high load at speed without lubrication and without slip-stick chatter. Stock shapes machine cleanly. Limitations to plan around: strength and impact are lower than unfilled acetal homopolymer, the material is attacked by strong acids and oxidizing agents, it is not UV stable, and as with acetal homopolymer generally, inspect large-diameter rod for centerline porosity before through-boring.