so my issue is as follows:

Part of my work is with jet nozzles and spray patterns, these balls have a flat top fir the tubing "pullout" and then round off into a one half of a sphere and then there is a bottom half that get welded together in manufacturing ( ill attach screengrabs) .

i have a circle at the exact point inside the " top" to align the robo drill square to the ball no matter what direction the "stream" is going.

m current process of moving all these lines out to this "shoulder radius is going into top orientation 2d wireframe, and using the snap to apparent intersection , move the grip of each line from center out to this circle.  this is very tedious for 300 + lines at a time.  any help?

thank you all in advance 

By "move the grip of each line" do you mean that only that one end of a line moves to the Circle, and its other end stays where it was, or that the entire line moves, so it stays at the same slope?  [I can imagine from your description that the slope might be important, and should be preserved though the line is moved outward.]

You don't show an image in 3D of the "after" condition, but you talk about apparent intersections.  Do the moved endpoints go on the circle, or to the point on the line that is above the circle in the Z direction [the apparent intersection in plan view, but where that is on the line rather than on the circle]?  If the latter, can TRIM do what you want?

Is the common endpoint of the lines where they intersect accurately at the center of the circle, in all three directions?

Are the lines always drawn in the same direction, either outward from the center or inward toward it?

What would be the process?  User selects circle and lines associated with it?  Routine finds them all without User selection?  Would there be more than one set in the same drawing?

thanks for getting back to me.

T he goal would be  - once all lines are drawn from common start point in  various places in space, the user can select all lines he wants from common point in  "center of ball", then select the circle he wants to move them to , hit enter and all the selected lines move up ( or down) on the Z axis till they intersect that circle, latch to that point on the radius, and then are trimmed or shortened to remove " leftover line" if any in the ball.

this would happen a few times in a model , however the ball and lines will all be drawn in the same ball they will be moved to shoulder of in the command.

an added bonus would be a selection option after all lines are selected in the aforementioned process, that the command asks if you want to move tom start point of lines or end point.  for a different process we do entirely. the rest would be same.   this is completely extra though and not relevant to the problem i hope to solve ASAP.   thank you! i know this is wordy but trying to get all the information out there   and then ill fine tune whatever you need!

THANK YOU AGAIN  THIS IS VERY MUCH APPRECIATED ! 

LENGTHEN command, DElta option, give it the negative of the Circle's [the ball's] radius, and shorten all Lines by that amount by picking on them at/near that center-of-it-all location.  If that does what you want manually, it may be automatable.