Catalog FATH US Industrial Hardware 2.2 - Page 272



Informaon
Technical
Surfaces
SURFACE SPECIFICATIONS AT FATH
(Excerpt from FATH norm )
. Barrel Finishing
Preparatory treatment for further finishing (coloring, powder
coa ng...). For bulk ware with smaller irregulari es.
. . Sandblas ng – Glass Bead Blas ng
Preparatory treatment for further finishing (coloring, powder
coa ng...). For single parts.
. Roughness and Func on Specifica on of Surfaces
. . Erosion Structure on visible Plas c Surfaces
All visible surfaces of plas c parts have an eroded structure
according to VDI
.
Ejectors may not be placed on visible surfaces if not indicated
otherwise.
This is a Ra value of approximately . .
Comparison table VDI 3400 – DIN EN ISO 1302 (approx. values)
Value VDI
Value DIN EN ISO 1302 [μm]
18
.
ISO 1302
N6
25
.
N7
30
.
N8
36
.
N9
42
.
N10
45
N10
Example: Indica on on drawing
Visible surfaces erode VDI ; Ref. No. XX according to FATH
. . Surface Specifica ons According to DIN EN ISO
Drawings created at FATH usually provide no surface specifica ons.
Manufacturers are intended to be “as free as possible” in
manufacturing as far as all dimensions are correct.
In case surface specifica ons are made on the drawing these are
related to DIN ISO
.
If not indicated otherwise, surface specifica ons refer to the Ra-value.
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