You send a drawing to a CNC machine shop and the part has a 0.4 mm wall on a brass sleeve. Before cutting a single bar of material, you want to know whether that wall will hold across a 5,000-unit run. That conversation is what custom design support is for.
what does CNC design support include
Weeda Precision reviews incoming drawings for minimum wall thickness, tool access, thread depth, and burr-prone features. For a stainless steel bushing with a 6 mm bore and a 0.2 mm radial tolerance, the support team flags whether the internal threading will strip under normal operating torque.
This review happens before any CNC turning schedule is locked in. The buyer receives a short written note listing which features carry risk and what small change—a chamfer, a relief groove, a material swap from brass to bronze—would stabilize the part.
how to prepare drawings for design review
Attach your drawing revision number, expected annual volume, and the specific application: a plastic molding gate pin, a sensor housing sleeve, or an automation fixture shaft. State the surface finish you need; Ra 1.6 and Ra 0.8 change the turning pass count and cycle time noticeably.
If the part is new, request a sample quantity of 10 to 20 pieces. That allows the shop to cut, measure, and return an inspection report with thread gauge results before you commit to batch production.
Write your tolerance stack-up and the critical-to-quality dimensions in a separate table on the drawing. It shortens the back-and-forth and keeps the custom design support conversation about numbers rather than guesswork.