Delrin

Delrin (generic: acetal) is a low-friction, high-stiffness material. It is used in applications ranging from auto parts to musical instruments. With a relatively high toughness and minimal elongation, Delrin boasts excellent dimensional accuracy.

JingYu also offers Delrin AF (13% PTFE-Filled) and Glass-Filled Delrin.

When compared with standard Delrin, Delrin AF has an increased coefficient of friction for applications that require lubrication. With an excellent wear resistance, toughness, strength and dimensional stability, this material is often found in load bearing applications such as bushings, bearings, cams, thrust washers, gaskets and valve seats.

Glass-filled Delrin offers superior stiffness and dimensional stability with a high resistance to creep. Glass fibers increase impact resistance and fatigue endurance. This material is commonly used for automotive applications, construction, fixturing, and gear manufacturing.

Material Properties

Delrin 150

Tensile Strength：9,000 PSI

Elongation at Break：25%

Hardness：Rockwell M90

Density：1.41 g/㎤，0.05 lbs / cu. in.

Maximum Temperature：180° F

Delrin AF (13% PTFE Filled)

Tensile Strength：7,690 - 8,100 PSI

Elongation at Break：10.3%

Hardness：Rockwell R115-R118

Density：1.41 g/㎤，0.05 lbs / cu. in.

Maximum Temperature：185° F

Delrin (30% Glass Filled)

Tensile Strength：7,700 PSI

Elongation at Break：6%

Hardness：Rockwell M87

Density：1.41 g/㎤，0.06 lbs / cu. in.

Maximum Temperature：185° F

Material Finish

Delrin-150 and Glass-Filled Delrin materials are naturally opaque white because of its crystalline structure and has a matte finish. Delrin AF comes in a brown color (pictured on the right).

Design Recommendations

Min Wall Thickness：0.5 mm

Min End Mill Size：0.8 mm (0.03 in)

Min Drill Size：0.5 mm (0.02 in)

Max Part Size：1200 x 500 x 152 mm[(x,y,z] (mill) 152 x 394 mm [d,h] (lathe)

Undercuts：Square profile, full radius, dovetail profiles

Radii（Depth） ：

· Depth must not exceed 12x drill bit diameter.

· For end mills, depth must not exceed 10x drill bit diameter.

Warping：

Due to the composition of Delrin and temperatures from machining, it is highly susceptible to warping on large, flat parts or where there are thin walls. We recommend avoiding thin walls; if you need thin walls, use fasteners to clamp down your design.

Cost Saving Tip：To reduce costs, limit the number of part setups, the number of inspection dimensions or tight tolerances, and deep pockets with small radii.