Cast Iron

cast iron CNC material

At a Glance

Process

Lead Time

Finish Options

Tolerance

Price

Applications

As fast as 7 days
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium
$$
Automotive parts (e.g. brake calipers), fluid pipes, pump housings, weights

About the Material

Cast iron is a dependable wear-resistant material which machines faster than many steel varieties. This is an ideal material for absorbing vibrations. Parts commonly made with cast iron include gears, bases, pulleys and bushings.

Material Properties

Yield Strength

Elongation at Break

Hardness

Density

McMaster Part Number

120,000 PSI
1%
Rockwell C20
0.258 lbs / cu. in

Material Finish

Compared to steel alloys, cast iron is a darker shade of grey. To achieve a variety of surface finishes, cast iron parts can also be media blasted or tumbled.

cnc machined delrin

Design Recommendations

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8mm
(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.

Related Resources

Engineer's Guide to CNC Machining for Prototyping Hardware
Fictiv CNC Material Datasheet