Data Sheet
10/10/2018 Fathom Spool Documentation
http://docs.bluerobotics.com/spool/#specifications 9/19
For the large version, use six threadlocked M5x16 screws instead and a 3.0 mm hex driver to secure the six spool
standos and one stiening ring, with the stiening ring placed between the standos and the spool face. Match the
stiening ring cutout pattern to the spool face. Tighten the screws until they indent the plastic slightly.
Step 5: Attaching the Crank Arm Hub to the Second Flange
Using four threadlocked M5x12 screws and a 3.0 mm hex driver, secure the crank arm hub to the second ange. Note
the screw heads come through the plastic ange to screw into the aluminum crank arm hub, and the short end of the
core should be passed through the central hole in the ange. The two teeth on the crank arm hub should line up with
two splines on the ange. If they do not, rotate 90° and secure. In addition, the ange should be oriented with the
splines curving as shown. Press the black plastic plug in the hole in the crank arm hub. Tighten the screws until they
indent the plastic slightly.
Step 6: Adding the Tether Securing Clips
DO NOT use threadlocker for this step.