New at meviy: Geometric Dimensioning and Tolerancing Available for CNC Turning
At meviy, we are constantly striving to enhance our services and deliver precision-driven solutions for our customers. Today, we are thrilled to introduce a game-changing addition to our CNC machining capabilities: Geometric Dimensioning and Tolerancing (GDT) for CNC turned parts.
Geometric dimensioning and toleranceing are essential in modern manufacturing, ensuring that every part meets the highest standards of precision and functionality. With this new service, we’re empowering engineers and manufacturers to define and achieve tighter specifications, resulting in parts that perform flawlessly, even in the most demanding applications. Whether it’s about maintaining concentricity, flatness, or parallelism, our enhanced capabilities will help you achieve the exact tolerances you need for your projects.
What is Geometric Dimensioning and Tolerancing?
Geometric dimensioning and tolerancing is a system used in engineering and manufacturing to define and control the allowable variation in the shape, orientation, and position of a part’s features using symbols. Unlike traditional dimensional tolerances that focus on size, geometric tolerances specify how far a feature can deviate from its ideal form, ensuring that components fit and function as intended within an assembly.
Common types of geometric tolerances include:
- Flatness: Ensures a surface is even and free from waviness.
- Cylindricity: Controls the roundness and straightness of cylindrical parts.
- Concentricity: Ensures that the centre axis of one feature aligns with another.
- Parallelism: Verifies that surfaces or axes are parallel within a specified range.
By incorporating geometric tolerances into your designs, you can achieve higher precision, reduce assembly issues, and improve overall product quality.
Geomtric Tolerance for CNC Turned Parts at meviy
| Geometric Tolerance Type | Symbol | Plane | Cylindrical Surface | Datum | Corresponding Tolerance Value* |
|---|---|---|---|---|---|
| Flatness |  | 〇 | – | – | 0.01 to 0.1 |
| Parallelism |  | 〇 | – | Required | 0.01 to 0.1 |
| Perpendicularity |  | 〇 | 〇 | Required | 0.01 to 0.1 |
| Circularity |  | – | 〇 | – | 0.01 to 0.1 |
| Concentricity |  | – | 〇 | Required | 0.01 to 0.1 |
| Straightness |  | – | 〇 | – | 0.01 to 0.1 |
| Cylindricity |  | – | 〇 | – | 0.01 to 0.1 |
| Circumferential Runout |  | – | 〇 | Required | 0.01 to 0.1 |
| Full Swing |  | – | 〇 | Required | 0.01 to 0.1 |
Supported materials, surface treatment, and heat treatment
| Material | Type | Compatible Surface Treatment |
|---|---|---|
| Iron/Steel | EN 1.1191 equiv. (flat bar) (S45C) | Black oxide Electroless nickel plating Hard Chrome Plating (Flash Plating) Salt bath nitrocarburizing Phosphating (Manganese) |
| EN 1.0038 equiv. (SS400) | ||
| EN 1.7220 equiv.(SCM435) | ||
| EN 1.7220 equiv. (26 to 32 HRC) | ||
| EN 1.2825 equiv.(SKS3) | ||
| EN 1.2379 equiv. (SKD11) | ||
| EN 1.2344 equiv. | ||
| EN 1.3505 equiv. (SUJ2) | ||
| – | ||
| EN 1.4301 equiv.(304 Stainless Steel) | ||
| EN 1.4401 equiv. (316 Stainless Steel ) | ||
| 440C Stainless Steel | ||
| Aluminum | EN AW−2017 equiv. (A2027) | Clear anodized Black anodized Black anodized (matte) |
| EN AW-5056 equiv. (A5056) | ||
| EN AW-6061 equiv. (A6061) | ||
| EN AW−7075 equiv.(A7075) | ||
| Brass | C3604-LCd | – |
