Update on the rocket engine tooling.
The #6-32 tap arrived for threading the pin retention holes.
The holes were drilled past the center of the anvil in order to get a complete thread thru the center hole.
Anvil with pin and retaining bolt:
A longer socket head cap screw was chosen to eliminate the need for a wrench to tighten it.
In this image, I have highlighted the slight undercut (blue) to assist in pin retention without excessive bolt torque that would likely deform the pin if tightened with a wrench against the full diameter of the pin.
The pin was tapered by .010" in it's exposed length (red)
to assist in removal from the rocket engine charge after tamping.
The pin diameter where it enters the anvil is 1/8th of an inch, or approximately 3mm
The #6-32 tap arrived for threading the pin retention holes.
The holes were drilled past the center of the anvil in order to get a complete thread thru the center hole.
Anvil with pin and retaining bolt:
A longer socket head cap screw was chosen to eliminate the need for a wrench to tighten it.
In this image, I have highlighted the slight undercut (blue) to assist in pin retention without excessive bolt torque that would likely deform the pin if tightened with a wrench against the full diameter of the pin.
The pin was tapered by .010" in it's exposed length (red)
to assist in removal from the rocket engine charge after tamping.
The pin diameter where it enters the anvil is 1/8th of an inch, or approximately 3mm