Delrin AF

Delrin AF is a unique thermoplastic blend of Acetal Homopolymer and high-strength PTFE (Teflon) fibers. It represents the ultimate solution for engineers seeking the stiffness and strength of Delrin combined with the world-class low friction of PTFE. This self-lubricating material eliminates the need for external grease, preventing the "stick-slip" effect and reducing mechanical wear. At Jucheng Precision, we specialize in the high-precision CNC machining of Delrin AF into bushings, thrust washers, and silent-running gears. Our expertise in processing this "super-slippery" polymer ensures that your precision components are delivered with exceptional surface quality and the dimensional integrity required for maintenance-free mechanical assemblies.

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POM / Acetal Material Variants

グレード	一般名	主な特性	代表的な用途
Delrin AF	PTFE充填POM	Lowest coefficient of friction. Blended with 13% or 20% Teflon fibers. Extreme wear resistance.	High-speed bearings, thrust washers, moving slide components, silent gears.
Delrin 150	POM-H（ホモポリマー）	Highest mechanical strength and stiffness. Best for precision gears.	Structural mechanical parts, precision gears, high-load clips.
POM-C	アセタールコポリマー	Zero centerline porosity and superior chemical resistance to hot water and bases.	Fluid manifolds, food processing parts, medical handles.

Delrin AF Machining Capabilities

能力	技術的説明	Juchengの強み
Ultra-Smooth Bore Turning	Machining internal bearing diameters to Ra 0.4μm to maximize the self-lubricating effect of the PTFE fibers.	We utilize specialized diamond-polished inserts to ensure the Teflon fibers are sheared cleanly, creating a slippery, low-friction interface.
Precision Thrust Washer Milling	Milling thin, flat washers with strict parallelism (+/- 0.02mm) to prevent uneven wear in rotating assemblies.	Our vacuum workholding systems ensure that thin Delrin AF plates remain perfectly flat during high-speed milling operations.
Complex Low-Friction Cams	Using 4-axis CNC milling to create intricate cam profiles that operate without external grease.	Jucheng’s precision ensures smooth profile transitions, reducing mechanical noise and stick-slip vibration in automated machinery.
High-Volume Bushing Production	Rapid production of self-lubricating bushings using automated bar-fed Swiss lathes.	Offers high-speed output with extremely consistent dimensions, making Delrin AF a cost-effective alternative to lubricated bronze.

Fabrication Guidelines for Delrin AF

Distinctive Appearance:
Delrin AF is typically dark brown or chocolate in color due to the PTFE fibers. ヒント: This makes it easily distinguishable from standard white or black POM during assembly and inspection.

Cutting Temperature:
While the PTFE fibers provide lubrication, heat buildup can still cause material softening. ヒント: We use sharp tools and high-volume air blast or water-soluble coolant to keep the material rigid for accurate cutting.

Avoid Bonding:
Due to the high Teflon content, Delrin AF is almost impossible to glue or bond. ヒント: Design your assembly using mechanical fasteners or interference (press) fits.

Environmental Stability:
Like all acetals, Delrin AF has very low moisture absorption. ヒント: It maintains its precise dimensions even in submerged or high-humidity environments, unlike Nylon.

主な用途

High-Speed Sliding Bearings
Bushings and sleeves in office equipment and conveyors that must operate silently without liquid lubricants.

Medical & Laboratory Equipment
Moving parts in diagnostic machines where grease contamination would ruin sensitive samples or sensors.

Consumer Electronics
Internal sliding mechanisms for cameras, lens actuators, and high-end audio-visual equipment.

Industrial Automation
Guide rails, wear strips, and cam followers that require long-term durability and a low “breakaway” force.

特性

密度	1.54 g/cm³
引張強度	50 - 55 MPa
Elastic Modulus	2.8 - 3.0 GPa
硬さ	115 Rockwell R
Coefficient of Friction	0.15 (Dynamic)
Wear Rate	Outstanding
連続使用温度	90 - 100 °C
吸水率	0.20%
Color	Dark Brown / Chocolate
被削性評価	優れている
最大部品サイズ	2000 x 800 x 600 mm