CNC Machined Heat Sink Base Plate

The base plate is where heat first lands. A 0.1 mm flatness error cuts the contact area noticeably — no fin design can recover that.

Critical dimensions

Mounting-face flatness, stud position and hole depth are the three points we control. Flatness is corrected before drilling so a second clamping does not disturb the datum.

With fins

Finned base plates are skived first, then the base is milled. Milling keeps clear of the fin roots to avoid loosening or cracking them.

Process notes

Billet cutting, skiving if required, base milling, flatness correction, drilling and tapping, deburring, chromate or anodized finish, CMM sampling.

Applications

Power device cooling, laser bases, power modules, server CPU cold plates.