Gigacasting
Look at how toys are made cheaply, then ask why full-size products cannot be made the same way
Gigacasting replaces hundreds of individually manufactured, welded, riveted, and bonded parts with a single massive casting. The insight came from studying how consumer toys achieve extreme precision and low cost: die-cast toy cars have their entire underbody as a single piece. Musk asked why full-size cars could not be made the same way. Most casting companies said it was impossible at that scale. One Italian company said yes and built machines that could cast an entire car chassis in 80 seconds.
- Look at how cheap consumer products are manufactured and ask why you cannot do it at scale
- Precision is not expensive—it is mostly about caring
- If something does not exist but would not break the laws of physics, push suppliers to build it
- Replacing hundreds of parts with a single casting eliminates hundreds of failure modes, assembly steps, and quality checks
- Study industries with extreme cost and speed constraints for inspiration
- Identify multi-part assemblies ripe for consolidationFind assemblies in your product that consist of many individual parts welded, riveted, or bonded together. These are candidates for single-piece casting.Pro tipThe more parts in an assembly, the greater the benefit of casting it as a single piece. Assembly labor, fixturing, and quality inspection all scale with part count.
- Study analogous manufacturing in consumer productsLook at how toys, appliances, and other mass-produced consumer goods achieve precision and low cost. What techniques do they use that your industry ignores?Pro tipToys must be manufactured cheaply, flawlessly, and by Christmas. These constraints force extreme manufacturing innovation.
- Find or commission the manufacturing equipmentIf the equipment to produce a single casting at the required scale does not exist, commission its development. If it does not break the laws of physics, it can be built.Pro tipAsk multiple suppliers. Five said impossible; one said yes. The one who says yes is the one who matters.WarningCustom manufacturing equipment is expensive. The investment is only justified at scale.
- Redesign the product around the castingDo not try to replicate the old multi-part design as a single casting. Redesign the product to take full advantage of the casting's properties.Pro tipCastings can integrate features (mounting points, channels, structural reinforcements) that would require separate parts in a traditional assembly.
Tesla's rear underbody previously consisted of over 100 parts that needed to be stamped, welded, riveted, and bonded. Using a 6,000-ton Idra casting machine, the entire assembly was replaced by a single aluminum casting produced in about 80 seconds.
Musk was playing with a die-cast toy Model S and noticed its entire underbody was a single piece. He brought it to a meeting and asked why Tesla could not do that for real cars. His engineers pointed out that no casting machine existed that was large enough. Five of six casting companies said it was impossible. Idra Presse in Italy said they could build a 6,000-ton, and later a 9,000-ton, casting machine. The result transformed car manufacturing.