OEM Customization Checklist for NEMA 23 Orders

1) Define non-negotiable specs

Send must-have values first: target torque window, speed window, current class, shaft geometry, cable/connector standard, and ingress protection expectation.

If you include only marketing terms like high torque or high speed, sample rounds will expand and risk of mismatch rises.

2) Align validation method with factory

Agree on test condition baseline before sample build: voltage, current limit, controller pulse mode, load inertia, and acceptance criteria.

This prevents a common dispute where factory test passes but customer-side commissioning fails under a different setup.

3) Plan supply continuity before pilot lot

For repeated B2B orders, ask for winding code traceability, connector BOM lock, and controlled change process.

A simple change-notice agreement helps avoid silent substitutions during scale-up.

4) Lock commercial terms tied to engineering risk

Define MOQ by configuration, not by family name. Custom shaft, cable, or connector often creates a different MOQ and lead-time profile than standard parts.

Ask for split lead-time visibility: engineering confirmation, sample build, validation iteration, and mass-production window should be shown separately.

Include an engineering change clause in quotation terms so approved samples cannot drift silently during repeated orders.

5) Build a sample validation matrix before approving MP

Test rows should include torque-speed point checks, no-step-loss acceleration profile, thermal soak result, connector pull/fit verification, and cable flex behavior if moving harness is used.

Each row needs pass criteria, test owner, and evidence format. Without this matrix, teams often approve by impression instead of measurable performance.

Keep one reference controller and one reference driver setup for all sample rounds to avoid apples-to-oranges comparisons.

6) RFQ email structure buyers can copy

Subject example: NEMA 23 OEM RFQ - shaft custom + cable harness - annual qty. Body should include target torque/RPM, current class, shaft drawing, connector spec, validation criteria, expected annual quantity, and required delivery milestone.

When needed, add one line for preferred communication: quote-only first or engineering discussion first. This reduces back-and-forth and shortens quote cycle.