#4-40 x 0.135 Qty 50 Threaded Heat-Set Inserts used for connecting 3D printed and injection molded parts.
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Wbruwer
> 24 hour0 )
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Jason
> 24 hourEasy to melt these into PLA with a soldering iron, very good hold.
50 x English #4-40 size and thread
Use a soldering iron like the Hakko FX888D and tip (both not included) to heat up the insert and then press into a printed or pre-drilled hole that is slightly smaller than the mid dimension of the insert. Start out by designing a hole approximately 0.165" (4.2mm) in diameter. If you are drilling the hole, you can start with a 5/32" bit or a No 19 drill bit.
#4-40 heat set inserts
Use for connecting plastic 3D printed and injection molded parts
True heat-set style inserts which are wider at the top than the bottom
- Quantity of 50
- Increase connection strength between parts where at least one side is plastic and using #4-40 machine screws to secure
- Repeatedly connect and disconnect parts without stripping plastic
- Create a professional or commercial look to your parts
- Increase part life
English #4-40 heat set insert dimensions
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0.1355" (3.44 mm) tallEnglish #4 threads Be sure to give the hole this goes into extra depth beyond the 0.1355" for melting plastic to subside into. We usually add at least 50% the height of the insert. More the better. |
0.1723" (4.38 mm) wide at the top of the insertTrue heat set inserts are wider at the top than the bottom |
0.1577" (4.0 mm) wide at the bottom of the insertTrue heat set inserts are narrower at the bottom than the top |
How to use inserts
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Create hole in your work pieceYou can design in a hole with your CAD system and 3D printer. Or you can just drill a hole where you want. For these #4 inserts, the hole should be about 5/32" or the size of a number 19 drill bit. You will need to design in extra depth in the hole so that melting plastic from the heat set will flow downward and out of the way rather than come up into the insert threads. |
Set your soldering iron temperature to at least your plastic melt temperatureHotter irons will melt the plastic much faster. If it"s too hot, the plastic will smoke. If it"s too cold, you will have to put a lot of pressure and the insert will go much more slowly. Every type of plastic is different. Find out the melt temperature of your plastic and start the soldering iron temperature there and adjust up or down as needed to control smoke, speed, and pressure required to do the insertion. |
Horizontal methodThere are two primary ways to hold the insert on an insertion tip for best results. The horizontal method allows the insert to sit on the end of the tip without falling off. See listing video for an example. |
Vertical methodThe vertical method requires that you hold the insert with a small set of needle nose pliers or some type of holding device. Since the tips are designed to slide right out, you will bring the soldering iron to the held insert, insert the soldering iron into the insert, and then let go of the pliers and begin to hot press the insert into the plastic. See listing video for an example. |
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| English #4-40 threaded inserts | English #4, #6, #8, 1/4" | English #4, Metric M5 | Metric M2, M2.5, M3, M4, and M5 | Metric M3 with 30 M3 inserts | |
| English units | ✓ | ✓ | ✓ | ||
| Metric units | ✓ | ✓ | ✓ | ||
| Hakko FX888D compatible | ✓ | ✓ | ✓ | ✓ | |
| Usable with these inserts | ✓ | ✓ |