GRINDING, PARTING LINES AND GATE AND RISER WITNESSES
Gates, risers, flash, fins and shifts will be removed and adjoining
surfaces blended to within the limits specified
below. Additional grinding will be performed only when specified. In the
absence of specific requirements it will be considered normal to blend
excess material into the castings contour within these limits.
Minimizing the requirements for grinding will result in a more economical
part. In general, less trimming will be performed on those surfaces that
subsequently will be machined.
Casting Weight |
Witness Marks |
Up thru 10 lbs. |
1/32 in. |
10 - 25 lbs. |
3/64 in. |
25 - 50 lbs. |
1/16 in. |
50 - 100 lbs |
1/8 in. |
Over 100 lbs. |
Consult Foundry |