found a cool article testing hobbed bolts against eachother, was wondering about this myself a while back but couldnt find the answer at the time

From article:
To summarize, here are the measurements from all of the tests, in order. An asterisk indicates the *8mm drive gears.

MK8 - 9#
MK7* - 9.7#
MK7 - 11#
Ultimaker - 11.3# (*&^%*O)
SeeMeCNC - 12.3#
Ultimaker - 13.3# (BangGood)
HobGoblin - 16#
HobGoblin* - 17#
Brass Gear - 17.3#
RobotDigg - 20+#
RobotDigg* - 20+#

Link:
[www.instructables.com]

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