End Milling an Aluminum Window Transom for Joint Fit
A worked example of using an assembled sample to evaluate transom end milling and fit against a mating aluminum frame section.
Application and evidence
A transom end must seat into a mating frame section while preserving the visible shoulder line. This application example follows the joint from section drawing to trial assembly.
Setup and process
Compare the two profile cross-sections and mark the shoulder datum and contour. Mill a sample from the intended stock, keeping the finished face protected during locating and clamping.
How to verify the sample
Assemble the sample and inspect the shoulder gap, step between faces and fit across the full joint width. If drainage holes or slots are also required, inspect those separately against the marked face and finished-end datum.
Related selection guides
For aluminum window profile end milling, take the shoulder datum from the mating section and carry it through the drawing, setup and dry-fit inspection.