Designing an LED fixture and the catalog heat sink doesn't fit your board or your wattage? EKINSUN machines a custom aluminum LED heat sink to your exact LED/COB footprint — no extrusion die, from 1 piece. Quote in 24 hours.
An LED Heat Sink Matched to Your Board
Off-the-shelf LED heat sinks come in fixed sizes and hole patterns — great until your COB, MCPCB or star board doesn't line up, or the thermal budget needs a bit more fin. We machine the heat sink to your LED instead: the correct mounting holes, a flat lapped contact face for the thermal pad, and the fin area your drive power requires. Because it's CNC machined, not extruded, there's no die to pay for and the minimum order is one piece — ideal for a prototype fixture that later scales to production.
Sizing by LED Power
The right heat sink depends on drive power, ambient temperature, orientation and the target junction temperature — but as a starting point:
| LED power | Typical approach |
|---|---|
| 1–3 W | Small finned block or star heat sink, passive |
| 5–20 W | Finned plate, natural convection, black anodized |
| 20–60 W COB | Larger finned body; pin/blade fins, sometimes active |
| 60–150 W+ | Heavy finned mass or active/liquid — high-bay, streetlight, grow light |
Send us the LED, the power and where it runs, and we'll size and quote it — no thermal-engineer required on your side.
LED Applications We Machine For
COB & high-power LEDs
Cree, Bridgelux, Luminus and generic COBs — heat sink matched to the LES and hole pattern.
Downlights & spots
Round finned heat sinks for MR16, downlight and track fixtures.
High-bay & street lights
Large-mass finned sinks for 50–150W+ outdoor and industrial fixtures.
Grow & UV-LED
Heat sinks for horticulture bars and UV-LED curing modules that run hot and continuous.
Material, Finish & Mounting
- Aluminum 6061 / 6063 — 6063 for fin-dense bodies, 6061 for machined heat sinks with mounting features and driver pockets. Copper for extreme flux.
- Black anodized — raises emissivity for better radiative dissipation and protects the surface; clear and colored also available.
- Flat lapped contact face for the LED/MCPCB thermal pad or paste, tapped holes for the star/COB holder, and an optional pocket for the driver.
Just have the LED and a target wattage? That's enough. Send the part number or footprint and the drive power — we machine the aluminum heat sink to it, from one piece.
Frequently Asked Questions
Can you make a heat sink for a specific LED or COB?
Yes. Send the LED/COB part number or its footprint, hole pattern and thermal pad size, plus the drive power. We machine the aluminum LED heat sink to match the mounting exactly with the fin area your wattage needs.
What wattage can you cool?
From a 1W indicator to 100W+ COB arrays and high-bay fixtures. We size fin area and mass to your power, ambient and target junction temperature — passive, or active where space is tight.
Should it be black anodized?
Usually yes — black anodizing raises emissivity (better radiative dissipation) and protects the aluminum. Clear/colored also available.
Machined or extruded?
We machine — no die, no tooling cost, MOQ 1, and we match non-standard footprints. For very high volumes of a simple profile, extrusion may be cheaper and we'll tell you.
Minimum order?
1 piece, no setup fee. The same program scales to production as your fixture ramps.
Related: all custom aluminum heat sinks · CNC milling · order from a sketch · all custom parts
Get a Free Quote
Send the LED/COB, the wattage and quantity — or a drawing. Reply within 24 hours.
Response within 24h · Drawings kept confidential