Aluminum Die Casting Tolerance Standards

Aluminum die casting enables a higher manufacturing rate than many other metal alloys. This technique also tends to be less costly. It yields lightweight but durable parts ready for any application. NADCA dimensional tolerances for one aluminum die half are as follows:

· Standard: +/- 0.010 inch per 1 inch — then +/- 0.001 inch for each additional inch

· Precision: +/- 0.002 inch per 1 inch — then +/- 0.001 inch for each additional inch

Additionally, NADCA provides a set of cast component tolerance standards regarding dimensions over the parting line. These measurements are determined by the projected area of the die casting and expressed in inches squared. The standard tolerances for aluminum are:

· Up to 10 in2: + 0.0055 inch

· Over 11 in2 to 20 in2: + 0.0065 inch

· Over 21 in2 to 50 in2: + 0.0075 inch

· Over 51 in2 to 100 in2: + 0.012 inch

· Over 101 in2 to 200 in2: + 0.018 inch

· Over 201 in2 to 300 in2: + 0.024 inch

The precision tolerances for the projected area of the die casting are defined by these units:

· Up to 10 in2: + 0.0035 inch

· Over 11 in2 to 20 in2: + 0.004 inch

· Over 21 in2 to 50 in2: + 0.005 inch

· Over 51 in2 to 100 in2: + 0.008 inch

· Over 101 in2 to 200 in2:+ 0.012 inch

· Over 201 in2 to 300 in2: + 0.016 inch