Tolerance Capabilities for Custom Metal Fabrication and CNC Machining

Please note that these tolerance capabilities are average tolerances. Actual results may vary slightly by design/material requirements.

  • Material Thickness, single pass rolling

    0.008 inches Total Range
  • Formed Wall thickness

    0.004 inches Total Range
  • Radial hole location, degrees

    ±1 degree
  • Inside Diameter

    Without expanding
    ±0.005 inches
    With expanding up to 10” diameter
    ±0.002 inches
    With expanding 10 – 18” diameter
    ±0.004 inches
  • Rolled Ring Expanded

    Out of round, free state form, 2.5" to 4"
    0.020 Total Range
    4" to 6"
    0.030 Total Range
    6" to 10"
    0.045 Total Range
    10" to 13"
    0.060 Total Range
    13" to 16"
    0.093 Total Range
    16" to 19"
    0.125 Total Range
  • Lock Seam

    Out of round, 1" to 2.5"
    0.020 Total Range
    2.5" to 4"
    0.035 Total Range
    4" to 6"
    0.045 Total Range
    6" to 10"
    0.062 Total Range
    10" to 13"
    0.093 Total Range
    13" to 16"
    0.125 Total Range
    16" to 19"
    0.187 Total Range
  • Lock Seam Perpendicularity

    bumped up to 4.5” diameter
    0.010 Total Range
    Unbumped up to 19” diameter
    0.060 Total Range
  • Ring Length

    bumped up to 6.5” diameter
    ±0.005 inches
    Unbumped 1.5” to 6” diameter
    ±0.025 inches
    Large ring 6" to 19” diameter
    ±0.032 inches
  • Axial hole location from the gaged edge

    Internal punch & button
    ±0.015 inches
    Within a die set
    ±0.005 inches
    From CNC axial datum edge
    ±0.005 inches
  • Unbumped offset axial

    1" to 6” diameter
    0.015 Total Range
    6" to 18” diameter
    0.030 Total Range
  • Base location from ring edge

    ±0.02 inches
  • Base location radial, degrees

    ±1 degree
  • Weld spot location

    ±0.125 inches
  • CNC machining tolerances

    Length cutoff
    ±.004 inches
    Parallelism
    .005 Total
    Perpendicularity
    .005 Total
    Internal and external dia turning
    ±0.005 inches
    Depth of (rabbets)
    ±0.015 inches