3D Printer Aluminum Heat Sink for MK7 MK8 Extruder

3D Printer Aluminum Heat Sink for MK7 MK8 Extruder
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  • Product Code:SQ8269
  • Availability: 1000
  • $0.50
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  • Ex Tax:$0.50

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Tags: heat sink, aluminum heatsink, 3D printer part, MK7 MK8, extruder cooling, cooling block

The extruder cooling block is a black anodized aluminum heat sink designed specifically for 3D printer extruders, particularly the widely used MK7 and MK8 models. Measuring 40 × 40 × 11 mm, it is machined from high-quality aluminum to provide rapid heat transfer away from the extruder, preventing overheating and protecting temperature-sensitive components during long prints. The precisely spaced fins increase the surface area for efficient thermal exchange, while the oxidized surface coating adds hardness and corrosion resistance.
Standard mounting holes with 31 mm spacing allow straightforward installation onto the extruder kit, and the block is compatible with common MK-series cooling fans. Weighing approximately 17 g, this aluminum cooling fin adds minimal mass while improving thermal stability. Whether you are replacing a worn heat sink or upgrading a stock extruder, this 3D printer heat sink helps maintain consistent extrusion temperatures, reduce clogs caused by heat creep, and extend the service life of your printer’s hotend assembly.

3D Printer heat sink Application

  1. Cooling the extruder on MK7 and MK8 3D printer hotends
  2. Preventing heat creep and filament jams during long prints
  3. Replacing worn or damaged stock extruder heat sinks
  4. Upgrading cooling performance on DIY 3D printers
  5. Maintaining stable extrusion temperature for consistent print quality
  6. Extending the service life of extruder components

3D Printer heat sink Specifications

  1. Model: ALEX-B
  2. Type: B-type aluminum heat sink for MK7 and MK8 extruders
  3. Material: High-quality aluminum
  4. Dimensions: 40 × 40 × 11 mm
  5. Mounting Hole Spacing: 31 mm
  6. Center Hole Size: 12 mm
  7. Screw Size: 3 mm
  8. Weight: Approximately 17 g (per third-party sources; not listed on the Aftab Rayaneh page)
  9. Color: Black
  10. Surface Finish: Oxidized (anodized) coating
  11. Fin Pattern: Dotted lines (per third-party sources)
  12. Compatibility: MK7 and MK8 extruders
  13. Operating Temperature: Not specified in the available sources
Physical Parameters
Size 40mm x 40mm x 11mm
Material Aluminum
Color Black, Gold

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