Our Manufacturing Standards
We strive to achieve and maintain design drawing tolerances with rigorous quality control. CNCdoing orders meet the minimum workmanship standards listed below.
1
Finished Surfaces Cosmetics
- Paint coverage on surfaces will be uniform, including adjacent materials of assemblies
- Finished surfaces will be free of defects including chips, scrapes, or other damage
2
Mill Steps, Tooling & Chatter
- Tool marks on as-milled surfaces will be free of defects including burrs, chatter, tool gauges and will meet surface roughness specifications
- Clearly indicated critical surfaces will be free of mill steps and marks across the entire surface
- Milled surfaces will meet surface roughness specifications
3
Chips, Burrs & Sharp Edges
- All exposed edges will be free of burrs, sharp edges, and metal slivers
- Sheet cut parts will not be deburred unless specified through a selected finish
4
Foreign Object Debris (FOD)
- Surfaces will be free of cutting fluid, metal chips, foreign objects, and other debris
5
Threads
- Threads will be fully formed and cut to specified size and class according to provided drawings
- Threads will be free of defects, notable damage, and contamination
6
Plated Surfaces
- Plated surfaces will be uniform, including adjacent surfaces of assemblies
- Plated surfaces will be free of machining marks, scratches, pits, protrusions, or any visible bare metal
- Some minor defects may be permissible in certain situations if they do not compromise the protective finish
7
Weld Joints
- Weld joints will be finished as specified in the weld callouts of the provided part drawing
- Welds without specific requirements will be cleaned to remove slag or other surface contamination
- If required, weld joints will not be painted until the welding has been completed and the weld has passed inspection
8
Countersinks
- Countersinks shall be round and made to print specifications and allow the proper designed fit with the mating screw
- Countersinks will be free of burrs, chatter, or other tooling defects
9
Painted Surfaces
- Painted surfaces shall be consistent and continuous in the finish
- Painted surfaces shall be free of visible machining marks, scratches, abrasions, dust particles, fisheyes, orange peel, or bare metal
- Painted surfaces should be reviewed against this standard at a distance of 18" at 1X magnification
CNC Orientation & Form Tolerances
Parallelism, Perpendicularity, Cylindricity, Circularity, Flatness, and Straightness over Part Length
| Dimension Range | Standard Tolerance | Precision Tolerance |
|---|---|---|
| 0 – 50 mm | ±0.05 mm | ±0.01 mm |
| 50 – 120 mm | ±0.10 mm | ±0.02 mm |
| 120 – 400 mm | ±0.15 mm | ±0.05 mm |
| 400 – 1000 mm | ±0.20 mm | ±0.08 mm |
| 1000 – 2000 mm | ±0.30 mm | ±0.12 mm |
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