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Die Cast Production Specifications
To be used in consultation with your die caster (Use in combination with Checklist C-8-2)*

Checklist for Die Cast Production Part Purchasing

This Production Checklist provides a convenient method for assuring important factors involved in purchasing die cast parts are evaluated and clearly communicated between the purchaser and the die caster.

It should be used as a supplement to the essential dimensional and alloy specifications detailed on part prints submitted for quotation, since the listed factors directly affect the basis on which the die casting quotation is made. The checklist may be reproduced for this purpose. Your die caster will clarify any item requiring further explanation.

This checklist provides a numbering system in which the lowest numbered description for each requirement can be met at the lowest production cost, as follows:

No.	Cost Effect
1	Most economical basis for production
2	Involves additional work which may affect cost
3	Additional work and special requirements which increase cost

A.	Surface Condition	1. Some residue and chips not objectionable
		2. Shop run - blown reasonably free of chips but not degreased
		3. Clean, dry and free of chips

B.	Cast Surface Finish	1. Mechanical Quality - finish is not significant
		2. Painting Quality - streaks and chill areas coverable with paint
		3. Highest Quality - for electroplating, decorative finishing, O-ring seats

C.	Flash Removal Parting Line External Profile	1. No die trimming - break off gate and overflows
		2. Die trimmed to within 0.010 in. (0.25 mm) of die casting surface
		3. Hand filed or polished - flush with die casting's surface

D.	Flash Removal Cored Holes	1. Flash not removed
		2. Flash trimmed to within 0.010 in. (0.25 mm) of die casting surface
		3. Flash to be machined

E.	Flash Removal Ejector Pins	1. Not removed (See NADCA Guideline G-6-5)
		2. Crushed or flattened (See NADCA Guideline G-6-5)
		3. Removed from specific locations

F.	Pressure Tightness	1. No requirement
		2. Pressure-tight to agreed-upon psi (kPa). Testing medium:
		3. Other arrangements to be agreed upon

G.	Flatness	1. No requirements
		2. To NADCA "Standard" specification tolerances (S-4-5)
		3. Critical requirement - to NADCA "Precision" specification tolerances (P-4-5)

H.	Dimensions	1. Normal: per NADCA "Standard" specification tolerances (S-4-5)
		2. Semicritical: "Precision" specification tolerances on specified dimensions, others "Standard"
		3. Critical: Special tolerances to be agreed upon

I.	Customer's Receiving Inspection	1. No unusual inspection requirements - no Statistical Quality Control
		2. Statistical Quality Control: Acceptable at Cpk 1.33 or higher (or AQL over)
		3. Statistical Quality Control: Acceptable at Cpk 2.0 or higher (or AQL over) (2 and 3 above: Require details of inspection procedure, with major and minor defects agreed upon)

J.	Packaging	1. Not critical - bulk packed
		2. Layer packed, with separators, or weight restriction
		3. Packed in cell-type separators or individually wrapped

K.	Casting Insert	1. No insert used in cast part
		2. Inserts required, to be supplied by customer at 10% overage
		3. Inserts required, to be supplied by die caster

*The specification provisions and procedures listed in Section 7, "Quality Assurance," subsections 3, 4 and 5, should also be addressed. Publisher grants permission to reproduce this checklist as part of a part of a die casting Request for Quotation or Reproduction Specification.

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