Invent the coupling

Design a practical response to Tidewell’s cracked coupling. The goal is not to print every spare part. The goal is to shorten a specific supply delay without installing an untested component on a working pump.

Write a proposal with these parts:

• Part choice: identify the coupling or another specific replacement part, its job, and why it is suitable for a local pilot. If it is not suitable, say so and choose a safer non-critical part.
• Design control: name the approved file, version, dimensions, and who may revise it.
• Material and maker: specify the required material, the qualified local printer or shop, and any limits on heat, chemicals, pressure, or load.
• Verification: state who checks dimensions and fit, what test happens before installation, and who has authority to reject the part.
• Fallback: explain what Tidewell does if the first print fails inspection or if the part is not appropriate for additive manufacturing.

Keep the proposal local and specific. For example: “Use the approved revision of a low-load plastic guide, print it in the specified engineering plastic at the regional shop, measure it against the housing, run it through a supervised low-speed test, and keep the supplier order open until the maintenance lead accepts it.”

Do not call a part successful because it came off the printer. It is successful only if it passes the required checks and performs safely in its intended use.

Common mistake: treating speed of production as proof of fitness for use.