A riser is a feeder with a job to do. Position follows the thermal map of the casting, and removing it to save metal is a false economy with a delayed bill.
Metal contracts as it cools, so the pattern is made larger on purpose. How the allowance is applied directionally, recorded, and proved on the first casting.
Section thickness decides the solidification pattern of a casting, and with it where shrinkage ends up. How to read a part for feeding before the pattern is cut.
Fabrication is the default for a reason, but joints carry cost and distortion. When one piece of stock beats several pieces, where the crossover sits, and why the hybrid design usually wins.
Titanium keeps cutting heat at the edge instead of sending it into the chip. Why dwelling cuts harden the surface, what the colour on a machined face reports, and how a burnt edge fails years later.
A cutter changes size while it works, so the last hole in a batch is not cut by the tool that cut the first. Wear patterns, drift direction, and how shops compensate before a part fails.
The first piece proves the setup, not the run. Why it starts longer, what the extra stock does, what gets measured on it, and why a one-off order is a first article with nothing behind it.
