Robbyrockett2
Air-Valve Autobot!
Since I had to do a lot of measuring to make matches I figured I might as well share. Could be helpful for making an exact repair.
So our main angle 6 deg;
The secondary angle stubs off about 1.1mm of what it would be if it continued.
Secondary angle 12deg
Again stubbed off flat , cutting about .3mm of what it would be;
The flat tip is about .05mm across, these are .1mm divisions;
A common method called centerless grinding is likely used, it a bit difficult to fully control so the angle actually runs slightly off parallel from the needles axis even though the point is centered.
(Imagine balancing a cone on a rod and tilting the bottom of it a bit)
This is why the taper length is different depending on which side it's measured on, as you see here;
This means the taper length can measure 11.1-11.5 mm.
So, to blueprint this needle tip I used a little applied trig.
I'll put that in the next post.
So our main angle 6 deg;
The secondary angle stubs off about 1.1mm of what it would be if it continued.
Secondary angle 12deg
Again stubbed off flat , cutting about .3mm of what it would be;
The flat tip is about .05mm across, these are .1mm divisions;
A common method called centerless grinding is likely used, it a bit difficult to fully control so the angle actually runs slightly off parallel from the needles axis even though the point is centered.
(Imagine balancing a cone on a rod and tilting the bottom of it a bit)
This is why the taper length is different depending on which side it's measured on, as you see here;
This means the taper length can measure 11.1-11.5 mm.
So, to blueprint this needle tip I used a little applied trig.
I'll put that in the next post.