Quick Overview
Nothing fancy here, just a remix of of my 32mm Tinkeriffic BB Bearing spindle. This one fits snugly in a **40mm** spool.
This three-part solution (thirteen parts, if one counts the 4.5mm BB's (http://bit.ly/1ngex61) is designed to use a Tinkertoy rod as an axle and is a much, much smoother ride for your filament spools.
I found inserting BB's into the original 608 bearing to be frustrating so I split the bearing in two and left it to the end user to super glue the parts together
40mm Bottom
Length: 1.57 in
Width: 1.57 in
Height: 0.14 in
Volume: 0.20 in cubed
40mm Core
Length: 0.60 in
Width: 0.60 in
Height: 0.28 in
Volume: 0.02 in cubed
40mm Top
Length:1.69 in
Width: 1.69 in
Height: 0.19 in
Volume: 0.23 in cubed