Sewing Machine Decomposition

A full teardown of a handheld sewing machine to understand how consumer products are actually engineered — not from specs, but from the parts themselves. Working with Matthew Maiava and Chris Pisinski, the project catalogued all 35 components: materials, manufacturing processes (injection molding, stamping, die casting, wire winding), and a 27-step disassembly sequence that revealed the modular subassembly logic underneath. The standout finding was intentional: polymer gears instead of metal reduce cost and weight at the expense of longevity — a conscious trade-off for a budget product where replacement is cheaper than durability.

Course: ME 40