Plaster Mold Casting Tolerances
Dimension | Normal Tolerance | Premium Tolerance | |||
Inches | MM | Inches | MM | Inches | MM |
Up to 2 | Up to 50 | ±0.010 | ±0.25 | ±0.005 | ±0.13 |
Up to 3 | Up to 75 | ±0.015 | ±0.40 | ±0.010 | ±0.25 |
Up to 4 | Up to 100 | ±0.019 | ±0.50 | ±0.012 | ±0.32 |
Up to 5 | Up to 125 | ±0.022 | ±0.60 | ±0.014 | ±0.37 |
Up to 6 | Up to 150 | ±0.025 | ±0.68 | ±0.015 | ±0.40 |
Up to 7 | Up to 175 | ±0.028 | ±0.74 | ±0.016 | ±0.42 |
Up to 8 | Up to 200 | ±0.031 | ±0.78 | ±0.017 | ±0.45 |
Up to 9 | Up to 225 | ±0.034 | ±0.85 | ±0.018 | ±0.47 |
Up to 10 | Up to 250 | ±0.037 | ±0.92 | ±0.019 | ±0.50 |
Maximum Variation | ±0.040 | ±1.00 | - | - |
Plaster Mold Process Overview
The plaster mold casting process is similar to sand casting. A slurry of molding plaster is dried onto a pattern to form clean, smooth, detailed mold halves. The halves are mated together to form the mold. Metal is typically gravity poured into the mold. When compared to sand casting processes, plaster molding allows for tighter tolerancing, minimal wall thickness, and smooth aesthetic surface finishes. This process is ideal for your more intricate and/or thin-walled castings in lower volumes. The plaster mold casting process is excellent for low volume production or as a bridge to high-volume production processes.
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Advantages
Exceptional detail through intricate sections
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Create With Ease
Ease of mold creation and customization allows for rapid prototyping and the production of unique, complex parts.
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Strength
Appropriately alloyed and treated, aluminum can be as strong as some steels with minimum yield strengths as high as 76,000 psi. Can also be made with lower strength where product specifications call for it.
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Resilient
Can deflect under loads and shock and spring right back. Can be designed as a product function wherever functional strength is valued.
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