Delrin Material: Top Choice for Durability & Performance

CNC MACHINING MATERIALS

Delrin

At a glance

Processes	Lead Time	Colors	Tolerance	Price	Applications	Grades
CNC Mill CNC Lathe	As fast as 3 days	White, black, brown	With drawing: as low as +/- 0.005 mm No drawing: ISO 2768 medium	$$	High rigidity and strength applications like gears, bushings, and fixtures	150, AF (13% PTFE Filled), 30% Glass Filled

About the Material

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.

Fictiv 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	Elongation at Break	Hardness	Density	Maximum Temperature
9,000 PSI	25%	Rockwell M90	1.41 g/㎤ 0.05 lbs / cu. in.	180° F

Delrin AF (13% PTFE Filled)

Tensile Strength	Elongation at Break	Hardness	Density	Maximum Temperature
9,000 PSI	25%	Rockwell M90	1.41 g/㎤ 0.05 lbs / cu. in.	180° F

Delrin (30% Glass Filled)

Tensile Strength	Elongation at Break	Hardness	Density	Maximum Temperature
9,000 PSI	25%	Rockwell M90	1.41 g/㎤ 0.05 lbs / cu. in.	180° 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

Max Part Size	Min End Mill Size	Min Drill Size	Min Wall Thickness	Undercuts	Radii : Depth
1200 x 500 x 152 mm [x, y, z] (mill) 152 x 394 mm [d, l] (lathe)	0.8mm (0.03 in)	0.5mm (0.02 in)	0.5 mm	Square profile, full radius, dovetail profiles	Depth must not exceed 12x drill bit diameter. For end mills, depth must not exceed 10x tool 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.

Delrin FAQs

Can Delrin be machined?

Delrin can be used in cnc machining. It is a good plastic for applications that will experience lots of friction, require tight tolerances, or need a high stiffness material.

Can you laser cut Delrin?

Yes, because Delrin can easily be removed by the laser beam, it is especially useful for laser cutting or engraving.

How do you cut Delrin plastic?

It’s possible to cut Delrin with a bandsaw, RAS, miter saw, or lathe.

Is Delrin stronger than nylon?

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