The Brass Heat-Set Threaded Round Insert Nuts is used every day for assemblies and components that need to be joined together. When fasteners are used in traditional manufacturing, bolts are often tapped straight into the metal substrates. 3D printed parts are unique from a material and robustness standpoint, therefore threaded holes can wear easily if the fasteners are taken on and off multiple times. Heat-set threaded inserts are your method for success for these types of assemblies.
The Heat-Set Threaded Round Insert Nut has been designed for post-mold installation into notch-sensitive thermoplastics using heat. It features very high pull-out and torque resistance.
A heat-set threaded insert has two important features. The inside of the brass piece of hardware has a nice, threaded thru-hole. The exterior has knurls and ridges, so when installed using heat, the plastic can easily flow around and then solidify. Once solidified, the insert is in place, making it resist torque and pull-out.
Note: Product Image and color may vary slightly from the actual product.
Tools you need:
Heat-set threaded Insert Nut
Plastic Body Part
Preparing the threaded insert:
Use the soldering iron on a low setting to preheat the threaded insert using a shallow tapered soldering iron tip.
When the threaded insert is up to temperature (should only take a few seconds) apply the insert to the appropriate hold. Apply a very little amount of pressure and the insert will melt the plastic in the hole and allow the insert to be set in place. The plastic will flow around the knurls of the insert. Be sure to align the insert squarely and flush to the plastic surface. Remove the soldering iron when it is in place.
After a few moments, the threaded insert will be ‘set’ within the plastic. The threaded insert is ready to receive the screw’s threads and the parts can be assembled.
- Heat-Set is designed specifically for notch-sensitive plastics
- Expansion-Sets offer simple press-in installation
- Flow-Sert is a blind insert for installation during the moulding process
- Brass Material Can Resist Heat.
- Not Easy to Rust, Strong Corrosion Resistance.
- Very high pull-out and torque resistance.
- Can be installed by ultrasonic or Heat into thread tapered hole, or moulded in during injection.
- No need to counterbore or countersink the boss hole since the insert has guide pilot.
- Used on the injection moulding for tightly fixing.
shobitsharma01 (verified owner) –
works great, I have used them with my 3d printed designs. No complaints with quality of product.
One thing to look for is that they have low pull out resistance due to vertical knurling.
So any application where there is a high load on the bolt, threaded insert will be pulled out.
For the application like lid for battery and other 3d printed containers, or applications with low load, these are perfect.
I suggest you to see the video on “CNC Kitchen” youtube channel on 3d printed inserts.