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Folded Fin Heatsinks

Custom Folded Fin Heatsink

All our folded fin heatsinks are built to customer specifications. Folded fin heatsinks can offer better thermal performance by maximizing surface area and minimizing space. Another advantage is the fin thickness to fin pitch can be made smaller than that of an extruded fin heatsink.

Folded fin heatsinks are generally made from aluminum and/or copper alloys, although other materials can be used. One advantage to this is that heatsink bases thicknesses can be made of thinner.

With folded fin heatsinks, base and fin materials can be mixed in order to tailor thermals to a customer's needs. Either a thermally conductive bonding adhesive or soldering can be used to attach fins to base material. See additional info for manufacturing specifications.

Standard Fin Materials are as follows:

Aluminum, Brass, Copper, Stainless steel, and Steel. (Fins are generally formed from soft temper grades of these materials)

Flow Length (A): From 1/8" to 24"

Standard tolerance on the cut width (flow length) is ± .010 However, due to expansion from forming, ± .015 should be allowed.

Cut Length (B): Limited only by machining capacity

Standard tolerance on the cut length is generally ± .03 Lengths are limited only by shipping capabilities.

Material Thickness (C): From .002" to .040"

Material thickness can range from a minimum of .002 thick to a maximum of .032 thick. The standard industry tolerance on the thickness is 10% of the total thickness.

Height (D): From .020" to 4.00"

Standard tolerance for fin height is ± .004. By adding a secondary sizing operation a tolerance of ± .002 may be held.

# Fins per Inch: From 2 to 65

Folded fin can be fabricated with a minimum of (2) fins per inch, up to a maximum of (65) fins per inch. The standard tolerance is generally ± 1 fin per inch. Fin heights over .30" can be sized to acquire exact fin count. Fin heights under .30" will require special tooling in order to acquire exact fin count.

Standard Fin Constructions

Plain (Square or Round ends):

Fin heights can be ordered in ranges from .020" to 4.000"

Ruffled:

Fin heights can be ordered in ranges from .020" to 4.000"

Ruffled/Lanced:

A combination of Ruffled and Lanced construction. (offers increased heat transfer)

Louvered:

Fin heights can be ordered in ranges from .100" to .500" Louver lengths range from .250" and up.

Lanced and Offset:

Fin heights can be ordered in ranges from .032" to .750" Lance lengths can range from .031" to 1.000"

Herringbone:

Fin heights can be ordered in ranges from .028" to 4.000"

Double Corrugation:

This configuration will allow for 30% more surface than with the Plain fin.

Folded Fin Heatsinks Custom Folded Fin Heatsink Request

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