Geometric Tolerancing for CNC Turned Parts
Last Updated: Aug 27, 2024
April 16, 2024 – meviy has rolled out a significant enhancement: geometric tolerancing for CNC Turning. This addition further amplifies the platform’s capabilities, enabling you to access nine types of geometric tolerances with a remarkable accuracy of up to 0.01 mm.
Available Geometric Tolerances
| Geometric Tolerance Type | Symbol | Flat surface | Cylindrical face | Datum |
|---|---|---|---|---|
| Flatness |
 |
〇
|
–
|
–
|
| Parallelism |
 |
〇
|
–
|
Required
|
| Perpendicularity |
 |
〇
|
〇
|
Required
|
| Circularity |
 |
–
|
〇
|
–
|
| Concentricity |
 |
–
|
〇
|
Required
|
| Straightness |
 |
–
|
〇
|
–
|
| Cylindricity |
 |
–
|
〇
|
–
|
| Circular runout |
 |
–
|
〇
|
Required
|
| Total runout |
 |
–
|
〇
|
Required
|
*Depends on the material.
Compatible Materials, Surface Treatments, and Heat Treatments
| Material | Tolerance Range | Compatible Surface Treatments | |
| Steel |
1045 Carbon Steel
|
0.01-0.10
|
Black Oxide
Electroless Nickel Plating Hard Chrome Plating Salt-Bath Nitrocarburizing Phosphate Coating |
|
1018 Carbon Steel
|
0.01-0.10
|
||
|
4135 Alloy Steel
|
0.01-0.10
|
||
|
4140 Alloy Steel
|
0.01-0.10
|
||
|
O1 Tool Steel
|
0.01-0.10
|
||
|
SKD11
|
0.01-0.10
|
||
|
SKD61
|
0.01-0.10
|
||
|
SUJ2
|
0.01-0.10
|
||
| Stainless Steel |
303 SS
|
0.01-0.10
|
—
|
|
304 SS
|
0.01-0.10
|
||
|
316 SS
|
0.01-0.10
|
||
|
440C SS
|
0.01-0.10
|
||
| Aluminum |
2017
|
0.02-0.10
|
Clear Anodize
Black Anodize Black Anodize (matte) |
|
5056
|
0.02-0.10
|
||
|
6061
|
0.02-0.10
|
||
|
7075
|
0.02-0.10
|
||
| Brass |
C3604-LCd
|
0.02-0.10
|
—
|
