CNC Machining Materials

ABS

At a glance

Processes

CNC Mill
CNC Lathe

Lead Time

As fast as 2 days

Colors

Black, neutral

Tolerance

With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Price

$

Applications

Impact-resistant applications, production-like parts (pre-injection molding)

About the material

ABS is a low-cost engineering plastic, widely used for pre-injection molding prototypes. CNC machined ABS is a great option for production-like parts, where detail and mechanical properties are important.

Material Properties

Tensile Strength

5,100 PSI

Elongation at Break

40%

Hardness

Rockwell R100

Density

0.969 g/㎤
0.035 lbs / cu. in.

Maximum Temperature

160° F

McMaster Part Number

8586K66

Material Finish

ABS has a somewhat matte finish (think lego bricks) and can be painted. Certain faces may appear more shiny depending on their geometry and how they’re machined. If painting ABS parts, finish will be dependant of the choice of paint.

Design Recommendations

Max Part Size

1200 x 500 x 152 mm [x, y, z] (mill)
152 x 394 mm [d, l] (lathe)

Min End Mill Size

0.8mm
(0.03 in)

Min Drill Size

0.5mm (0.02 in)

Min Wall Thickness

0.5 mm

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 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.

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