🛠️ Precision Heat Set Insert Press Tool

This is a high-precision Heat Set Insert Press designed for makers who want perfectly vertical and consistent inserts every time. Built around a robust 2020 Aluminum Profile and an MGN9H Linear Rail, it offers industrial-grade stability in a compact, DIY format.

✨ Key Features

• Full Compatibility: The modular arm supports a wide range of tips (M2, M3, M4, M5, M6, M8).
• Smooth Action: Linear rail movement ensures zero play and perfect alignment.
• Auto-Retract System: Integrated mount for a retractable keychain to act as a smart counter-weight.
• Rigid Design: Optimized geometry (recently reinforced) to prevent flexing during use.

📦 Bill of Materials (BOM)

1. TOP Section

• Hardware: 2x M4x50mm (Countersunk), 2x M4 Nuts, 4x M4 Washers.
• Fixing: 3x M3x10mm (Countersunk) + 3x T-nut M3 
• Pulleys: 2x V624ZZ 
• 3D Parts: TOP.stl

2. BASE Section

• Assembly: 3x M3x10mm (Countersunk), 3x M3x8mm (Allen).
• T-Nuts: 6x
• Base Fixing: 2x M4 (Countersunk), 3x M4 (Allen).
• Retraction: 1x Retractable Key Chain 
• 3D Parts: BASE.stl

3. ARM Section

• Hardware: 6x Brass M4x5mm Inserts, 2x Brass M3x4mm Inserts.
• Screws: 4x M3x10mm (Countersunk), 2x M3x8mm (Allen).
• Tools: 1x 60W Soldering Iron + 1x Brass Heat Insert Nut Iron Tip Kit 
• 3D Parts: ARM.stl, LOCK.stl

4. BODY Section

• Structure: 1x 2020 aluminium profile 300mm 
• Motion: 1x Linear Bearingball MGN9H 300mm 
• Fixing: 5x M3x8mm Allen screws + 5x T-tut M3
• 3D Parts: BODY.stl x2

💡 Assembly & Printing Tips

• Material Choice: PETG or ASA is highly recommended, especially for the ARM piece. Since the soldering iron generates significant heat, it can soften PLA over time, leading to misalignment. Using high-temp materials ensures the tool remains precise and durable.
• Settings: 3-4 Walls | 15-20% Infill.
• Assembly: Use a long Allen key to reach the recessed screws.
• Counter-weight: Attach the retractable keychain to the rear of the base; thread the wire through the arm's guide hole or use the ring for a secure connection.

⚠️ Safety Note: Always ensure the soldering iron is securely locked and never leave it unattended while hot.

🔄 Changelog

• 2025/10/06: Reinforced ARM.stl for increased stiffness and better performance.