UHMW

At a Glance

Process

Lead Time

Color Options

Tolerance

Price

Applications

3 days (rush)
5-7 days (standard)
White, black
ISO 2768
$
Machine guards, liners in chutes and hoppers

About the Material

Ultra-High-Molecular-Weight Polyethylene (or UHMW) is a hard plastic with a slippery surface, which resists abrasion and wear. Additionally, it offers high impact strength and is the optimal material for chute/hopper liners and machine guards.

Material Properties

UHMW

Yield Strength (tensile)

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

5,000 psi
200%
Durometer 70D
0.034 lbs / cu. in.
180° F

Material Finish

UHMW comes in an opaque black or white color and can be machined to a range of surface finishes. It also has a slippery texture, which is ideal for machine guards and liners.

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