zipline zip line rope 10 mm tyrolienne corde 10 mm

DON'T PUT THE ROPE TOO HIGH IN CASE OF BREAKAGE !!!!!
I put the zip line just at a child's height (less than 1m50) so that he has to bend his legs to avoid touching the ground.
tested ok with under 20 kg kids.
tested also with my 75 kg but I just didn't slide.

customized from https://www.thingiverse.com/thing:363800
added emplacement for two 608 bearing in order to reduce friction and strengthen the axis
added 2 mm on pulley for the thicknness of bearings
added 1 mm on each side for the wear of friction of the rope
reduced the axis to 10 mm to place a 10 mm handle (aluminium rod for mine)

DON'T PUT THE ROPE TOO HIGH IN CASE OF BREAKAGE !!!!!
I put the zip line just at a child's height (less than 1m50) so that he has to bend his legs to avoid touching the ground.

needs
2 608 bearing
3 m4 screws
1 aluminium rod approx 200 mm