Heat set brass inserts are small threaded components made of brass that are designed to be embedded into plastic parts to create strong, reusable threads. They're commonly used in 3D printing, injection molding, and other plastic fabrication applications where a metal thread is needed in a plastic part.

TO What They Are:

• Material: Brass (chosen for its good thermal conductivity and corrosion resistance)
• Shape: Usually knurled or with a helical knurling to ensure a strong bond with plastic
• Sizes: Vary by thread size (e.g., M2, M3, M4, etc.) and length

 How Heat Setting Works:

1. Heat Source: A soldering iron (with a special tip, ideally) heats the insert.
2. Insert Application: The heated insert is gently pressed into a pre-designed hole in a plastic part.
3. Bonding: As the insert heats the surrounding plastic, it softens and flows slightly around the knurling.
4. Cooling: Once the insert is in place and the plastic cools, it hardens around the knurls, locking the insert in.

 Benefits:

• Reusable threaded connection
• Much stronger than threading directly into plastic
• Clean, professional look
• Great for parts that will be assembled/disassembled frequently

Tips for Successful Installation

• Hole Preparation: Ensure the hole diameter matches the insert specifications (e.g., 3.2mm for M3 inserts).
• Temperature Settings: Use a soldering iron set between 180°C and 220°C, depending on the plastic material.
• Pressing Technique: Insert the heated brass insert vertically into the hole using a press tool or tweezers until it is flush with the surface.
• Cooling: Allow the plastic to cool and solidify around the insert for a secure bond.