HDPE

At a Glance

Process

Lead Time

Colors

Tolerance

Price

Applications

3 days (rush)
5-7 days (standard)
white
ISO 2768
$
plugs and seals, electrical insulator

About the Material

High-density polyethylene (HDPE) is a slippery plastic that is often machined into plugs and seals. It is also an excellent electrical insulator as well as being moisture and chemically-resistant.

Material Properties

Tensile Strength

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

4,000 PSI
500%
Rockwell R65
0.958 g/㎤
0.035 lbs / cu. in.
180° F

Material Finish

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