Made for the heat.Built around the interface.

Start with the usable space above the processor, the socket mounting pattern and the chassis air path. Include the board stack-up, fastener access and clearance to the cover. A server rack-height designation alone does not define the space available for the heat sink; the assembly drawing controls the envelope.

Extrusion suits a continuous cross-section that can be cut and machined. Skiving creates fins from the parent material, while stamped or folded fins are formed from sheet and may require a joining operation. Compare fin geometry, tooling, base contact and production quantity together. We review the machining scope and confirm specialist forming or joining separately.

Send the fin thickness, pitch, height, unsupported length and base thickness as separate dimensions. Pitch is the repeating distance between fins; the open air gap is a different dimension. Feasibility depends on the forming route, alloy, tool access and handling strength. A single minimum thickness would be misleading across extruded, skived and machined designs.

The 2025 register for the former Dongguan site lists accuracy entries of 0.01–0.02 mm for three-axis CNC, 0.02 mm for five-axis CNC and 0.005 mm for Swiss-type turning. These are historical equipment-register values, not current Shenzhen capability or a universal finished-part tolerance. We confirm the tolerance for each critical feature against its size, material, setup, treatment and agreed inspection method.

No. A thickness tolerance controls a size; flatness controls the form of a surface. Specify the contact area, flatness, roughness and inspection condition separately, including whether the part is free or restrained. Thin bases can distort during machining, joining or clamping, so the acceptance condition matters as much as the numerical limit.

Define the finish by surface function. Mark any contact faces, threaded features and electrical bonding areas that need masking or a different treatment. State the coating specification and whether dimensions are accepted before or after finishing. A black surface alone is not evidence of a particular cooling performance.

The 2025 Dongguan metrology register included one CMM, three 2.5D instruments and three surface-roughness meters. Current Shenzhen instrument availability must be confirmed. For the project, agree the critical-characteristic list, datum scheme, accessible measurement points and report format. Instrument availability does not by itself establish measurement uncertainty for every feature.

A dimensional drawing alone is not enough. Supply the heat-source footprint, power, temperature limit, interface material and mounting pressure, plus airflow or coolant conditions. Agree who validates the assembled thermal performance and under which test conditions. Thermal resistance must identify the measurement locations and operating conditions.

Provide the channel and cover drawings, seal lands, port details, joining method and wetted materials. For an assembled scope, specify the test medium, pressure, hold time and permitted leakage. Machining, joining, cleaning and leak testing must have clear responsibilities before production.

Share the sample quantity, forecast, drawing revision and target delivery date. We review stock, tooling and the manufacturing route before confirming quantity and timing. Agree first-article dimensions and any functional tests before releasing the production batch; sample approval should refer to the same revision and finish condition.