Tolerance Guide
A. | Dimensions one side of parting |
0" - 3" ±0.030" | |
3" - 6" ±0.040" | |
6" - 9" ±0.050" | |
9" - 12" ±0.060" | |
12" Plus ±0.060" ±0.002 in/in |
B. | Dimensions across parting |
1 to 10 sq. in. add ±0.015" | |
10 to 100 sq. in. add ±0.030" | |
100 to 250 sq. in. add ±0.045" | |
250 to 500 sq. in. add ±0.065" |
C. | Core dimensions Shell cores |
0" - 6" ±0.018 | |
6" - 12" ±0.025 | |
12" Plus ±0.040" ±0.001 in/in | |
Add 0.015 across parting | |
CO2, Oil Sand | |
Same as A and B Dimensions |
D. | Draft angles |
D1 Outside 1º - 3º | |
D2 Internal pockets | |
Drag 1º - 5º | |
Cope 3º - 7º | |
D3 Core box oil sand 2º - 5º | |
Core box shell 1/2º - 3º |
E. | Dimensions between 2 cores |
0" - 6" ±0.045" | |
6" - 12" ±0.06" | |
12" - Plus ±0.06" ±0.002 in/in |
F. | Dimensions between core and mold |
Same as E |
G. | Parting line fins |
±0.015 Grind finish required | |
±0.030 Commercial quality |
H. | Gate and Riser connection |
±0.015 Special grinding required | |
±0.06" - 0.03" Commercial quality |
I. | Wall thickness |
Up to 3/8" +0.060" - 0.030" | |
3/8 Plus ±10% of wall thickness |
J. | Mismatch or Mold and/or core shift |
0" - 8" ±0.030" | |
8" - 18" ±0.060" | |
18" Plus ±0.090" |
K. | Core fins |
±0.015" - Special quality" | |
±0.030" - Commercial quality |