Delrin® 100AF Full Strength Rod

Delrin® 100AF Full Strength is acetal homopolymer carrying the full 20% PTFE fibre loading on the high-viscosity Delrin® 100 base resin - half again the PTFE of the 100AF Blend, which is diluted back to 13%. The extra PTFE buys bearing headroom: limiting PV rises to 11,000 against 8,300 for the blend on DuPont's own comparison, and friction against steel runs dry at 0.18-0.19 static and 0.19-0.20 dynamic. Published properties for the 20% PTFE stock shape - one datasheet covers the loading rather than each base resin - are 6,630 psi tensile strength at yield, a 540,000 psi tensile modulus, 12,500 psi flexural strength, 12,600 psi compressive strength and 30% elongation at break, with heat deflection at 244°F under 264 psi and 334°F under 66 psi.

It is machined into bearings, bushings, thrust washers, cam followers, cams, gears, rollers, sleeves, slide pads, guides, valve seats and wear plates for conveyor systems, printing, packaging and paper machinery, business machines, automotive assemblies and heavy industry, wherever a bearing has to carry load at speed with no lubrication. Of the two AF base resins the Delrin® 100 base is the tougher, so this is the one to choose where the part takes shock. Be clear-eyed about the trade: against the 13% blend the full loading gives up tensile strength, compressive strength and hardness, and the published wear factor is slightly worse at 65 against 57, so buy it for PV capability and low friction rather than as an all-round upgrade. Melting point is 350°F, continuous service 185°F, flammability UL 94 HB, and the grade is not FDA, NSF or USDA compliant.