PEEK

peek cnc material

At a Glance

Process

Lead Time

Colors

Tolerance

Price

Applications

As fast as 3 days
Opaque beige
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium
$$$
Metal-alternative for high-stress applications

About the Material

In high-stress/high-temperature applications, PEEK is a great lightweight substitute for most soft metals. Additionally, PEEK is resistant to moisture, wear, and chemicals.

Glass-filled PEEK is a high performance plastic with excellent rigidity, strength and toughness. The addition of glass fibers enhances its ability to maintain dimensional stability even in harsh thermal and chemical environments. This material is often used in the following industries: aircraft, automotive, medical, chemical, semiconductor and microwave.

Material Properties

PEEK

Yield Strength (tensile)

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

14,000 psi
20%
Rockwell R125
0.047 lbs / cu. in.
480° F

PEEK (30% Glass Filled)

Yield Strength (tensile)

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

14,000 psi
3%
Rockwell R126
0.054 lbs / cu. in.
480° F

Material Finish

PEEK comes in an opaque beige color and can be machined to a variety of surface finishes.

cnc machined delrin

Design Recommendations

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8 mm
(0.03 in)
0.5 mm
(0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill) 

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.

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