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Tolerances
Aluminum
TOLERANCES FOR
PRESSURE DIECASTINGS
(DIN 1688)*
1) Determining the spatial diagonal:
The spatial diagonal R is that between the extreme points of the casting.
It is calculated from the nominal dimensions of the prismatic body, which delimits the casting, whatever its shape
R = l² + b² + h² (spatial diagonal)
Spatial
diagonal
area
over 180
over 50
up to 500
over 180
over 500
Table 1. Tolerances of dimensions for lengths, widths, heights, central distances, diameters and roundings.
Nominal Dimension Area
Degree of
Shape
over over over over over over over over over over over over over
exactitude dependency ^{up to 18}
30
50
80 120 180 250 315 400 500 630 800 1000
18 up to up to up to up to up to up to up to up to up to up to up to up to up to
30
50
80
120 180 250 315 400 500 630 800 1000 1250
GTA 13
Intrinsic
±0.14 ±0.17 ±0.20 ±0.23 ±0.27 ±0.32
Non-Intrinsic ±0.24 ±0.27 ±0.30 ±0.33 ±0.37 ±0.42
GTA 13/5
Intrinsic
Non-Intrinsic
±0.17 ±0.20 ±0.25
±0.32 ±0.35 ±0.40
±0.30 ±0.35 ±0.40
±0.45 ±0.50 ±0.55
±0.45 ±0.50
±0.60 ±0.65
±0.55
±0.70
±0.60
±0.75
GTA 14
Intrinsic
±0.22 ±0.26 ±0.31 ±0.37 ±0.44 ±0.50 ±0.60 ±0.65 ±0.70 ±0.80 ±0.90 ±1.00 ±1.20 ±1.30
Non-Intrinsic ±0.42 ±0.46 ±0.51 ±0.57 ±0.64 ±0.70 ±0.80 ±0.85 ±0.90 ±1.00 ±1.10 ±1.20 ±1.40 ±1.50
GTA 14/5
Intrinsic
Non-Intrinsic
±0.25 ±0.35 ±0.40
±0.55 ±0.65 ±0.70
±0.45 ±0.55 ±0.65
±0.75 ±0.85 ±0.95
±0.75 ±0.80
±1.00 ±1.10
±0.85
±1.10
±0.95 ±1.10
±1.20 ±1.40
±1.20
±1.50
±1.40
±1.70
±1.60
±1.90
Intrinsic dimensions are those in the same parts of the tool.
Non-intrinsic dimensions are those created by the interaction of movable tool components, e.g. wall thickness and base
thickness or dimensions affected by additives or extenders.
*Important: We assume no liability for quoted standards.
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