Standard Specs and Tolerances

eMachineShop default size and position tolerances.

Suface Finishes
Machined parts are as-machined. Vibratory tumble is available upon request.

Vibratory Tumble vs “As Machined”
Tumbling removes sharp edges and burrs. This may be more economical as it does not require machining chamfers to avoid sharp edges. In the example on the right, the part on the left is “as machined”, the part on the right is vibratory tumbled. (Chamfers were machined in this example.)

Note that the above images are samples only – actual results may vary.

Sheet Metal and Sheet Plastic Parts

Metal and Plastic: +/- .01″ for thicknessees ≤ .5″ and +/- for thicknesses > .5″
Holes: +/- .2″ for holes ≥ 2″

For parts with bends, the above applieds to the flat sheet before bending.

Upon request, tolerances down to +/- .001″ for metal and +/- .005″ for plastic are available for features up to 3″.

Machined Parts

Metal: 0-12″ +/- .005″      12-30″ +/- .01″      >30″ +/- .020”
*Double the above values for plastic; triple them for Teflon.*
Edge breaks: .005″ to .015″
Fillets at bottom of pockets: .003″ to .015″

Other Processes
For injection molding, rapid prototyping and other non-machining processes, please see the respective web pages.