Technical reference of aluminum sand casting

Table of tolerance level of sand casting parts

Basic dimension (mm) tolerance level of raw casting dimension (mm)
from to 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
/ 10 0.09 0.13 0.18 0.26 0.36 0.52 0.74 1 1.5 2 2.8 4.2 / / / /
10 16 0.1 0.14 0.2 0.28 0.38 0.54 0.78 1.1 1.6 2.2 3 4.4 / / / /
16 25 0.11 0.15 0.22 0.3 0.42 0.58 0.82 1.2 1.7 2.4 3.2 4.6 6 8 10 12
25 40 0.12 0.17 0.24 0.32 0.46 0.64 0.9 1.3 1.8 2.6 3.6 5 7 9 11 14
40 63 0.13 0.18 0.26 0.36 0.5 0.7 1 1.4 2 2.8 4 5.6 8 10 12 16
63 100 0.14 0.2 0.28 0.4 0.56 0.78 1.1 1.6 2.2 3.2 4.4 6 9 11 14 18
100 160 0.15 0.22 0.3 0.44 0.62 0.88 1.2 1.8 2.5 3.6 5 7 10 12 16 20
160 250 / 0.24 0.34 0.5 0.72 1 1.4 2 2.8 4 5.6 8 11 14 18 22
250 400 / / 0.4 0.56 0.78 1.1 1.6 2.2 3.2 4.4 6.2 9 12 16 20 25
400 630 / / / 0.64 0.9 1.2 1.8 2.6 3.6 5 7 10 14 18 22 28
630 1000 / / / 0.72 1 1.4 2 2.8 4 6 8 11 16 20 25 32
1000 1600 / / / 0.8 1.1 1.6 2.2 3.2 4.6 7 9 13 18 23 29 37
1600 2500 / / / / / / 2.6 3.8 5.4 8 10 15 21 26 33 42

Required machining allowance for raw sand casting parts(RMA)

maximum dimension (mm) level of required machining allowance
from to 1 2 3 4 5 6 7 8 9 10
/ 40 0.1 0.1 0.2 0.3 0.4 0.5 0.5 0.7 1 1.4
40 63 0.1 0.2 0.3 0.3 0.4 0.5 0.7 1 1.4 2
63 100 0.2 0.3 0.4 0.5 0.7 1 1.4 2 2.8 4
100 160 0.3 0.4 0.5 0.8 1.1 1.5 2.2 3 4 6
160 250 0.3 0.5 0.7 1 1.4 2 2.8 4 5.5 8
250 400 0.4 0.7 0.9 1.3 1.4 2.5 3.5 5 7 10
400 630 0.5 0.8 1.1 1.5 2.2 3 4 6 9 12
630 1000 0.6 0.9 1.2 1.8 2.5 3.5 5 7 10 14
1000 1600 0.7 1 1.4 2 2.8 4 5.5 8 11 16
1600 2500 0.8 1.1 1.6 2.2 3.2 4.5 6 9 14 18

Value added services available for aluminum sand casting and gravity casting parts

value added services aluminum sand casting part aluminum gravity casting part aluminum die casting part
sand blasting √ √ √
tumbling √ √ √
common polishing √ √ √
mirror polishing   / √ √
heat treatment √ √ not available
powder coating √ √ √
plastic coating √ √ √
painting: 　------------------- 　　------------------- 　　-------------------
stoving varnish √ √ √
lacquer varnish √ √ √
silk screen printing √ √ √
electroplating: 　　------------------- 　　------------------- 　　-------------------
zinc plating √ √ √
nickel plating √ √ √
chrome plating √ √ √
black hard anodizing √ √ not available
chemical impregnation √ √ √
passivation √ √ √
electrophoresis √ √ √
assembly √ √ √
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