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Heat Sinks

Short answer: Heat sinks draw heat away from electronics through many thin fins that increase surface area. Fins can be made by extruding aluminum profiles, CNC milling, or skiving, in which a sharp blade slices thin fins up from a solid block of copper or aluminum.

The footage, credited to yh1234581, shows fins being sliced into a metal block.

VideoWrite-up1 sources
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What should you know about Heat Sinks?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Remove heat.

    DD-526-F01 · Write-up · Exhibit A (Purpose)

  2. More surface.

    DD-526-F02 · Write-up · Exhibit B (Fins)

Video transcript: Heat Sinks: Some Heat Sink Fins Are Sliced From a Solid Block

[...] are sliced [...] CNC milling, [...] or diamond [...] structure. [...] aluminum profiles [...] blades. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 17.9s Reel ·

Video coming soonHeat Sinks · Instagram Reel
Heat Sinks: Some Heat Sink Fins Are Sliced From a Solid Block Instagram Reel · · 17.9s

The write-up

Some heat sink fins are sliced from a solid block. More fins mean more surface to shed heat.

  1. Exhibit A

    Purpose

    Remove heat.

  2. Exhibit B

    Fins

    More surface.

  3. Exhibit C

    Methods

    Extrusion, milling, skiving.

  4. Exhibit D

    Metals

    Aluminum, copper.

  5. Exhibit E

    Skiving

    Blade slices fins.

Questions people ask about Heat Sinks

Fins add?

Cooling.

Source: Write-up · Exhibit A (Purpose) · Wikipedia: Heat sink

Common metal?

Light.

Source: Write-up · Exhibit B (Fins) · Wikipedia: Heat sink

Slicing method?

Blade.

Source: Write-up · Exhibit C (Methods) · Wikipedia: Heat sink

Another method?

Profiles.

Source: Write-up · Exhibit D (Metals) · Wikipedia: Heat sink

Purpose?

Electronics.

Source: Write-up · Exhibit E (Skiving) · Wikipedia: Heat sink

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. Fins add?

    1. Surface area
    2. Weight only
    3. Color
    4. Noise
    Show the answer

    Answer: A. Surface area Cooling. Source: Write-up · Exhibit A (Purpose) · Wikipedia: Heat sink

  2. Common metal?

    1. Aluminum
    2. Lead
    3. Gold
    4. Tin
    Show the answer

    Answer: A. Aluminum Light. Source: Write-up · Exhibit B (Fins) · Wikipedia: Heat sink

  3. Slicing method?

    1. Skiving
    2. Welding
    3. Casting
    4. Gluing
    Show the answer

    Answer: A. Skiving Blade. Source: Write-up · Exhibit C (Methods) · Wikipedia: Heat sink

  4. Another method?

    1. Extrusion
    2. Knitting
    3. Blowing
    4. Pouring
    Show the answer

    Answer: A. Extrusion Profiles. Source: Write-up · Exhibit D (Metals) · Wikipedia: Heat sink

  5. Purpose?

    1. Cooling
    2. Heating
    3. Lighting
    4. Sound
    Show the answer

    Answer: A. Cooling Electronics. Source: Write-up · Exhibit E (Skiving) · Wikipedia: Heat sink

Cite this case file

Easterling, Marcus. "Heat Sinks." The Detail Department (DetailEnjoyer), case file DD-526, last updated Mar 27, 2025. https://detailenjoyer.com/case/heat-sinks/

Permalink: https://detailenjoyer.com/case/heat-sinks/ · Last updated

Markdown version

Cite a single fact by its ID, for example DD-526-F01 → https://detailenjoyer.com/case/heat-sinks/#DD-526-F01