Caliburn Short Head Bolt
thingiverse
The long head of the current print rod can shatter at the O-ring passage due to excessive material ahead of it. Moving more weight forward of this weak spot generates additional inertia. This Short Head Bolt maintains identical functionality (vacuum seal channels, O-ring channels), but is less likely to break. The O-ring channels have been curved to eliminate the 90-degree angle that amplifies the risk of a break, and can accommodate two or three O-rings for maximum sealing performance.
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