Comparison of Standard Manufacturing Processes
The chart below summarizes the characteristics of the standard manufacturing processes to help you choose the right one for your products. We offer most of these processes.
|PROCESS||DIE CASTINGS||PRECISION SAND CASTINGS||RUBBER PLASTER MOLDING||INVESTMENT CASTINGS||PERMANENT MOLDING||GRAPHITE PERMANENT MOLD|
|Weight Range||0-30 lb (0-15kg)||0-45kg||0~ 12 kg||0-20 lb (0-10 kg.)||0 ~ 45 kg.||0 ~5 kg|
|Tolerance||±0.002" (±0.1mm); add ±0.015" across parting lines||±0.5-3.0mm||±0.2~3 mm||±0.003" to 1/4"; 0.004" to 1/2"; ±0.005" to 3"; then add 0.003" per inch||±0.4mm||±0.2mm|
|Flatness||Within 0.2mm (geometry dependent)||Within 0.5mm (geometry dependent)||Within 0.3 mm (geometry dependent)||Within 0.015" (geometry dependent)||Within 0.3mm (geometry dependent)||Within 0.2mm (geometry dependent)|
|Surface Finsh||32-63 RMS||120-175 RMS, except on cored areas||63-125 RMS||63-125 RMS||150-300 RMS||63 RMS or better|
|Minimum Draft Required||1° to 3°||0.5° to 3°||0.5° to 2°||None||2° to 4°||1° to 2°|
|Minimum Wall Section||0.030"-0.060" (0.8-1.5mm)||Typical: 3.5-5mm; Minimum: 2.0mm (geometry dependent)||Typical: 2.5~5mm. Minimum: 1.0mm (geometry dependent)||0.060" (1.5mm)||5mm||2.5mm|
|Typical Tooling Cost (N.R.E.)||$3k-$100k||$800-$4k||$3K - 15K||$3K - 10K||$5K - 15K||$1.5K - 5.5K|
|Nominal Lead Time||Samples: 4-6 wks; Production: 4-6 wks after 1st article approval||Samples:1-4 wks. Production:1-5 wks. after approval.||Samples:2 - 4 wks. Production:1-5 wks. after approval.||Samples:2-4 wks. Production:5-12 wks. after approval.||Samples:8-20 wks. Production:10-12 wks. after approval||Samples:3-6 wks. Production:2-4 wks. after approval. Lifetime use.|
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