VDI 3400 Standard: High-Precision VDI Finish, Surface Texture & Grain Solutions
VDI 3400 Finish Technical Chart (VDI 12 to VDI 45)
Our VDI finish grades follow the strict VDI 3400 specifications, suitable for EDM, laser, and VDI etching processes.
| VDI Grade | RA (µm) | VDI Grade | RA (µm) |
|---|---|---|---|
| VDI 12 | 0.40 | VDI 30 | 3.15 |
| VDI 15 | 0.56 | VDI 33 | 4.50 |
| VDI 18 | 0.80 | VDI 36 | 6.30 |
| VDI 21 | 1.12 | VDI 39 | 9.00 |
| VDI 24 | 1.60 | VDI 42 | 12.5 |
| VDI 27 | 2.24 | VDI 45 | 18.0 |
Plaque & Scale Specifications
A: Metal VDI Texture Plaque (200×85×5mm) – Full VDI 3400 standard scale by EDM/Laser (GF-AgieCharmilles).
B: Plastic VDI Surface Plaque (200×145×3.5mm) – Ideal for PP/ABS via EDM, VDI grain etching, or sandblasting.
C: Metal & Plastic VDI Finish Scale (130×30×4mm) – Portable VDI 3400 scale reference.
D: Plastic VDI Plaque (200×145×3.5mm) – Specially designed for transparent materials via EDM/Laser/Etching/Sandblasting.
E: Plastic SPI Scale (200×145×3.5mm) – SPI Finish standard for PP/ABS/PC materials.
F: Steel Plate SPI Set (25×48mm) – Professional SPI finish standard (Complete 12 pcs set).
Expert Insights into VDI 3400 & VDI Surface Texture
VDI 3400, established by the Verein Deutscher Ingenieure (VDI), is the global benchmark for VDI surface quality. While commonly processed through EDM (Electrospark Machining), our expertise extends to achieving precise VDI grain via chemical etching and advanced sandblasting.
We provide the full spectrum of VDI finish grades, from the mirror-like VDI 12 to the high-friction VDI 45. Our SPI Finish options include grades A1-A3, B1-B3, C1-C3, and D1-D3 for diverse mold surfaces.
Looking for a reliable mold texture supplier in China? We specialize in VDI 3400 finish and VDI surface texture for automotive, medical, and electronic industries.
Our standardized VDI grain and SPI finish solutions help clients achieve international quality while reducing costs by 40-50%. Trust us for “Excellent Management and Quality First” in every VDI finish project.