Plastopia provides VDI Scale for Surface Finishes at a pocket-size plastic card to give you visual and touchable reference on VDI texture standard. Each VDI texture scale card includes two sides of complete 12 VDI 3400 plaques :

The VDI 3400 refers to the German mold texture standard set by VDI (Verein Deutscher Ingenieure), the Society of German Engineers. The standard covers 45 grades of textures : from VDI 3400 #0 to #45 (RA 0.10 μm to RA 18.00 μm).

VDI 3400 Surface Finish – is a scale often used by German machine manufacturers and quite widely used in Spark and Wire Erosion (Verein Deutscher Ingenieure, the Society of German Engineers) Measurement of surface finishes is done with instruments called profilometers.

VDI 21 surface finish is in the lighter texture range for the VDI 3400 surface finish standard. It is widely used for automotive parts, consumer electronics, and other products where a specific texture is desired for aesthetic or functional reasons. The VDI 21 provides enough roughness for hand gripping and beautiful finish look.

2024年8月12日 · VDI 3400 defines surface texture standards for mold-making. It categorizes roughness classes using Ra values. German engineers played a crucial role in developing the VDI 3400 standard, ensuring consistent texture quality and improving product performance.

The following information has been collated to provide a guide to the surface finishes that we can achieve through electrical discharge machining (EDM). They are referenced as a VDI scale. = Average roughness of a surface. = Difference between tallest "peak" and deepest "valley" in surface. Filled materials tend to require more draft.

VDI 3400 is a vital texture standard developed by the Society of German Engineers (Verein Deutscher Ingenieure) that defines surface finishes for mold-making. This comprehensive standard covers 45 distinct texture grades, ranging from smooth to rough finishes, catering to various industries and applications.

VDI 3400 refers to the texturing standard set by the German Engineers Association Verein Deutscher Ingenieure (VDI). It is mainly processed by electrospark machining (EDM) in mold processing, but it can also be done by traditional texturing methods such as chemical etching.

Surface comparator scale VDI 12 to 45. One of the most important parameters for spark erosion treatment is the surface quality. The surface condition can be determined on a workpiece which is still clamped, simply and quickly using our comparison standard.

在国内实际生产中多用Ra指标；日本常用Rmax指标，相当于Rz指标；欧美国家常用VDI3400标准来标示表面粗糙度，做欧洲模具订单的工厂，经常会用到VDI指标，比如常听到客户说“这个产品的表面按VDI30做”。