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Manufacturing Standards Date:

Metal Extrusion

  • All quotes are based upon the assumption that designs have adequate wall thicknesses, radii, and feature sets designed for manufacturability in this process.
  • Critical-to-function tolerances should be discussed at the time of quoting to ensure that tooling strategy, check gages (if applicable), and other quality controls are encompassed in the quote.
  • Linear cross-section dimensions are +/- .010", or +/- .006” per inch, whichever is greater, excluding wall thickness.
  • Wall thickness is +/- 10% of the specified dimension.
  • Cross-section angularity for external corners is +/- 1 degree, and +/- 2 degrees for internal angles.
  • Critical toleranced features and surface finishes may require post-machining and should be noted in the quote before order. Post-machined features will follow Xometry’s CNC manufacturing standards.
  • Customer-provided models must contain appropriate material for additional post-processing efforts, such as post-machining. Xometry recommends providing the extruded 3D and final models with any accompanying technical drawings.
  • The surface roughness of as-extruded features is 125 μin Ra.
  • Twist not to exceed 0.5 degrees per 12” length is typical.
  • Straightness not to exceed .0125” per 12” length.
  • Sharp corners will have a radius of at least .016”.
  • Corner radii up to .188” will have a +/- .016” standard tolerance. Any radii over .188” will have a +/- 10% tolerance.
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Plastic Injection Molding

Plastic Injection Molding

  • All quotes are based upon the assumption that designs have adequate wall thicknesses, radii, and feature sets designed for manufacturability in this process.
  • Critical-to-function tolerances should be discussed at the time of quoting to ensure that tooling strategy, check gages (if applicable), and other quality controls are encompassed in the quote.
  • Critical toleranced features and surface finishes may require post-machining and should be noted in the quote before ordering. Post-machined features will follow Xometry’s CNC manufacturing standards for plastics.
  • Customer-provided models must contain appropriate material for additional post-processing efforts, such as post-machining. Xometry recommends providing the extruded 3D and final models with any accompanying technical drawings.
  • Wall thickness is typically +/- 10% of the specified dimension.
  • Angularity is typically +/- 3 degrees for rigid materials and +/- 5 degrees for flexible materials.
  • Twist typically does not to exceed 0.5 degrees per 12” length. Camber and bow not to exceed .025” per 12” length.
  • The surface roughness of plastic extrusions will be 125 μin Ra or better.
  • Sharp corners will have a radius of at least .016”.
  • Lumens within extruded tubes will be limited to four unless otherwise agreed upon.
  • Dimensions inside of hollows are difficult to control and will require tolerances considerably greater than the standard tolerances.

Standard Plastic Extrusion Tolerances By Feature Size

Size of Dimension Standard Tolerance *

< .125”

± .010”

.125” - .500”

± .020”

.500” - 1.00”

± .030”

1.00” - 1.50”

± .035”

1.50” - 2.00”

± .040”

2.00” - 3.00”

± .045”

3.00” - 4.00”

± .065”

4.00” - 5.00”

± .085”

5.00” - 7.00”

± .100”

7.00” - 10.00”

± .125”

* General tolerances strongly depend on the material extruded and cross-section complexity. Specialized tooling can be used to obtain tighter tolerances than those listed above.

Die Casting

Die Casting

  • Typical mold machined tolerances are +/- .010" when machining the mold and an additional +/- .001" per in. when calculating shrink rate.
  • Tighter as-molded tolerances can be requested and may increase the cost of tooling. Additionally, many tight tolerances require the mold to be manufactured, sampled, and groomed. Xometry will mill to a steel-safe condition on critical features.
  • Critical toleranced features and surface finishes may require post-machining and should be noted in the quote prior to order. Post-machined features will follow Xometry’s CNC manufacturing standards.
  • Xometry will produce die cast components according to the net-shape (as-cast) model provided by the customer. These models must contain appropriate material for any additional post-processing efforts, such as post-machining. It is recommended to provide the as-cast 3D model as well as the final model with any accompanying technical drawings.
  • Part-to-part repeatability is typically under +/- .004".
  • As-cast surface finish is typically 64 μin. The standard finish for die-casting is as-cast and cannot guarantee a specific Ra value without additional processing.
  • The lead time is for the first article shipment (T1 shipment). The remaining production time is confirmed after the first article approval.
  • Typical first article shipments are five pieces but may vary based on size, origin, and material.
  • All quotes are based upon the assumption that designs have an adequate draft, radii, and coring for manufacturability.
  • Cores, side actions, and tooling strategy are determined by Xometry unless explicitly discussed.
  • Gating, ejection, knit lines, and parting lines are at the discretion of Xometry unless explicitly discussed.
  • Parting line(s) on die cast parts will be visible as a thin ridge traveling across the part.
  • Cast parts may have one or many gate vestiges, which are trimmed, sheared, or ground off.
  • Ejector pin marks will be present on die cast parts, resembling round flats.
Plastic Extrusion

Plastic Extrusion

  • All quotes are based upon the assumption that designs have adequate wall thicknesses, radii, and feature sets designed for manufacturability in this process.
  • Critical-to-function tolerances should be discussed at the time of quoting to ensure that tooling strategy, check gages (if applicable), and other quality controls are encompassed in the quote.
  • Critical toleranced features and surface finishes may require post-machining and should be noted in the quote before ordering. Post-machined features will follow Xometry’s CNC manufacturing standards for plastics.
  • Customer-provided models must contain appropriate material for additional post-processing efforts, such as post-machining. Xometry recommends providing the extruded 3D and final models with any accompanying technical drawings.
  • Wall thickness is typically +/- 10% of the specified dimension.
  • Angularity is typically +/- 3 degrees for rigid materials and +/- 5 degrees for flexible materials.
  • Twist typically does not to exceed 0.5 degrees per 12” length. Camber and bow not to exceed .025” per 12” length.
  • The surface roughness of plastic extrusions will be 125 μin Ra or better.
  • Sharp corners will have a radius of at least .016”.
  • Lumens within extruded tubes will be limited to four unless otherwise agreed upon.
  • Dimensions inside of hollows are difficult to control and will require tolerances considerably greater than the standard tolerances.

Standard Plastic Extrusion Tolerances By Feature Size

Size of Dimension Standard Tolerance *

< .125”

± .010”

.125” - .500”

± .020”

.500” - 1.00”

± .030”

1.00” - 1.50”

± .035”

1.50” - 2.00”

± .040”

2.00” - 3.00”

± .045”

3.00” - 4.00”

± .065”

4.00” - 5.00”

± .085”

5.00” - 7.00”

± .100”

7.00” - 10.00”

± .125”

* General tolerances strongly depend on the material extruded and cross-section complexity. Specialized tooling can be used to obtain tighter tolerances than those listed above.

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