Carbo X Treme Tonearm

This project is for a simple DIY Unipivot Tonearm that I designed. The pivot can be made as you wish but I chose to use Stew Nelless' ball point pen pivot he designed and posted on DIYAudio as user Nanook. Many thanks to Stew for this ingenious concept!

Can be used as a replacement or for new build.

These are the printed parts you will need to make a tonearm using two arrow shafts. This is still evolving and can be customized.

Concept:

In action: 

Parts needed:

• Gold Tip XT Velocity 300 Arrow Shafts (2)

• 3mm x 4mm heat set screw inserts (3)

• 3mm bolt cut to length for pivot

• Good quality ballpoint pen refill 

• Cartridge and 3mm mounting screws

• 3M heavy duty double sided tape

• Epoxy and CA

• Holes for wiring will need to be drilled

• Foam dampening inside tubes is recommended. Small pieces.

- The front cover should be epoxied to the holder. The rear cover is adhered with double side. tape as is the weight cover.

-The carbon tubes can be secured with a few drops of CA or press fit as desired.

-The heat set screw inserts are for cartridge bolts and pivot.

-I grounded the two carbon tubes by connecting them the the left ground connection on the cartridge

-The pivot spacer is used to measure the distance from the spindle to the pivot/ballpoint pen refill 

-The needle tip to pivot centre must measure 12"/304.8mm

-I use Cura and used 50% infill with great results. Polymaker Polylite at 210 deg. 

A video will be made soon and posted here, but the assembly is quite simple.

And, happy for folks to make and enjoy but if you wish to produce commercially , please contact me.

Added Phat Carbon Arm Holder Front only for wider cartridges.