HDPE

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：4,000 PSI

Elongation at Break：500%

Hardness：Rockwell R65

Density：0.958 g/㎤，0.035 lbs / cu. in.

Maximum Temp：180° F

McMaster Part Number：8619K611

Material Finish

HDPE is a naturally opaque white because of its crystalline structure, but is also available dyed black in more limited stock sizes. It has a waxy finish leveraged for low-friction applications.

Design Recommendations

Min Wall Thickness：1.0 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.

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.