Too long, didn't read:

Make your own 3D printer filament !
Cheap and high quality at a decent speed of 150-190 IPM ! (4-5 meters per minute)

UPDATE: Now with wiring diagram !

Long read:

3D printers are cool and they finally start to drop in price. Kickstarter campaigns like the one from QB-UP or M3D are popping up and they are finally "affordable". And with affordable I mean affordable like 200 $ and not "affordable" like 2.199$ affordable. However, once you are a proud owner of a 3D printer you will soon realize that your wallet is far from being let alone. No ! You need plastic filament of course to print those super awesome coat hooks and wheel chocks. Since the price for these filaments tend to top the actual material costs, printing before mentioned life savers is kind of expensive and could become a problem to the development of the ever growing 3D printer community

BUT FEAR NO MORE !! Some clever gents came along - Hugh Lyman with his Lyman Extruder may be mentioned here or the guys over at Filastruder.com - and saved the day ! YAY. And there was much rejoicing ! They have built plastic extruders everyone can build or buy at a decent price. However if you are a fellow Instructable.com user the first thing that should come to your mind is "I can build this by myself...and cheaper...". Building at lower costs is the nature of DIY after all.

And much more fun than putting together a premade kit, of course.

Special greetings go out to Xabbax and his plain simple but super awesome Low Cost Filament Extruder !

So how much money do I save when making my own filament ?

Good question ! A lot !

Depending on the pellets you get you can make your filament starting at 1$/kg.

How long does it take to produce 1 kg of filament you may ask ??

Using the build I describe here...roughly 1 hour. (for 1,75mm filament using ABS/PC pellets).

So, let's say on a Saturday in your next workshop session you start at 10 AM and batten down the hatches at 5 PM you could make 4-5 kg of filament, saving between 125-150 $ leaving you with lots of filament for hundreds of thousands of eggcups and phone cases and other useless needful things.

Oh yeah what about the build cost ?

Depending on shipping and local prices, I would guess around 130-150$.

Next step: List of Materials

Step 1: Material list

Except for the electronics everything listed here can be bought at your local hardware store.


  • 1x Wiper Motor (Ebay EU - 15€) / 5€ from the junkyard
  • 1x Auger bit(diameter = 16mm ; length = 460mm)
  • 1x PID Temperatur Controller - DC 12V version (Ebay)
  • 1x SSR-25DA Solid State Relay 3-32V DC / 24-380V AC / 25A (Ebay)
  • 1x K-type thermocouple (Ebay - like this one; does not need to be that shop :) just an example)
    -->!!! Sometimes the PID is bundled with an SSR and an K-Type Thermocouple !!!<--

  • 1x Motor Controller 20A (Ebay)
  • 1x Power Supply 12V, 240W+ (Ebay)
  • 1x Heating band (200 Watt 25mmx30mm) (Ebay)
  • 2x Fans (80mm) 12V
  • 1x Fitting 3/4" US Inch UNC --- 1/2" German Inch - 18cm long
  • 1x Water tap extension - 3/4" UNC threads --- 1/2" German Inch - 50mm long, 27mm diameter (one core thread and one exterior thread)
  • 1x End cap 1/2"
  • 1x Faucet-mounted filter - 1/2" diameter
  • 3x Steel angle
  • 1x Axial ball thrust bearing (Ebay) - Fitting exactly onto the auger bit's shaft.
  • 2x 10mm threaded rod
  • 1x Insulation
  • PTFE tape
  • Heat resistant tape
  • 3x Rocker (previously "rocket") switches
  • 1x Wooden board 100cm x 10cm x 2cm
  • Several screws and nuts
  • 2x sockets (1 that fits on the auger bit and 1 that fits on the nuts of the motor shaft)
  • Wires (two colors)


  • Multitool (Dremel-like)
  • Saw
  • Hammer
  • Drill

About This Instructable


2,044 favorites


Bio: AMA trainee teacher studying teacherism 'n stuff. Ask me questions!
More by ianmcmill: Things to build out of CD/DVD-Drives Build your own 3d printer filament factory (Filament Extruder) How to repair your worn out solder tip
Add instructable to: