Delrin
At a Glance
Process
Lead Time
Colors
Tolerance
Price
Applications
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.
Material Properties
Tensile Strength
Elongation at Break
Hardness
Density
Maximum
Temperature
McMaster Part Number
Material Finish
Delrin is naturally opaque white because of its crystalline structure and has a matte finish.
Design Recommendations
Min Wall Thickness
Min End Mill Size
Min Drill Size
Max Part Size
Undercuts
Radii : Depth
0.5 mm
0.8mm
(0.03 in)
(0.03 in)
0.5mm
(0.02 in)
(0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill)
152 x 394 mm
[d,h] (lathe)
152 x 394 mm
[d,h] (lathe)
Square profile, full radius, dovetail profiles
Depth must not exceed 12x drill bit diameter.
For end mills, depth must not exceed 10x tool 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.
Related Resources
Engineer's Guide to CNC Machining for Prototyping Hardware
Fictiv CNC Material Datasheet