Replacement Sprocket/Break for Folding Handcart Fuxtec CT500 CT700, CT800

Introduction:

Whoever owns a folding handcart probably knows the problem with the break system.

After some days of use my break sprockets looked like this:

I used the handcart of FUXTEC model CT700. The model has in total 4 of those sprockets. two in the front and two at the back (CT500 only has 2 at the front). But similar handcarts do have the same sprockets.

I checked the official FUXTEC shop and saw that a replacement sprocket is 23,00 € each. (https://www.fuxtec.de/zahnkranz-bremse-bollerwagen-ct500-ct700-ct800/)

So i decided to re-model it and print it myself. The exact model information is:

Product Number: FX-CT700E1002
EAN: 4260449126594

Repair procedure:

1. If you wonder why the breaks do not work properly any more, check the sprockets at your wheels.
2. Print as many replacements as you need.
   (The additional ring is not really necessary, but the original model has this inner ring elevated to reduce friction. To keep printing easy is separated the part.)
   Print the side with the 14 ligaments printbed facing
3. Disassemble the wheels
   (pretty easy, just unscrew the screw that is the axis of the wheel)
4. Pull or lever out the old sprocket
5. Press the new sprocket in place and add the ring if you want.
   Consider that every 120° there is a fit, it's not every 60° as the ligaments are assymmetrical
6. Mount the wheel again and have fun =)

Result:

Now your breaks will work again and every time you accidentially break when the bar is not in the right position you will not pay 23 € plus porto, but only the filament you used ;-)

Additional information:

• Materials: I printed my versions in ABS, PLA+ or PETG should be fine as well
• Print orientation: With the 14 ligaments facing to the print bed. Then you only have small bridges and no support is needed
• Print settings:
  • I printed my part solid, as it consists anyway of perimeters mostly
  • For better layer adhesion slightly increase nozzle temperature and lower fan speed
  • You probably need to add a brim to increase layer adhesion
  • Layer hight between 0,15 and 0,2 mm is fine
• Other models (should probably work, but i cannot guarantee):
  • Kesser GT9000
  • Tresko
  • Arebos

If you like my work and want to support it you can do it here: 
https://paypal.me/sebastiandruckt

If you have any questions just drop me a message :-)