Enlarge hole for coax with coax still in

[Cinder]

Hey all.

I'm almost finished with some re-ruining of coax and Ethernet in my house.  I have come upon a problem.  The area where the cable was run in from the garage (hole though the header into the space between floors, which I can see but is unreachable from the adjacent room's drop ceiling) was drilled just wide enough for two coax cables to be pulled though without ends, and they were capped later. 

I have a piece of coax that I am trying to pull back though the hole attached to the other piece, but due to the hole not being large enough, the connector won't fit though. 

Anyone know a good way to make a hole wider without removing the coax that is in the hole?  I can't remove the coax since it was run though without the ends on, and then capped later.  And even if I recapped the end, I wouldn't be able to get the end back though. 

I tried drilling adjacent to the hole, and if I'm close enough it jumps over and would dig into the side of the coax.  I drilled about 1/8th inch to the side, and I feel like I need a chisel to remove enough of the wood. 

I have a Dremel Multi-max tool (it has various saw attachments and it vibrates to cut).  It works great until I get to the point where my blade isn't long enough to cut though the wood behind the drywall. 

Perhaps I just need to get a small chisel.  My Marlin Spike is too wide!  It worked for about half of the depth.  Or an old flat-head screw driver...

http://photosnpics.kokeytechnology.com/wp-content/uploads/2009/09/Dremel-Multi-Max-Oscillating-Tool-with-MM440-%C2%BE%E2%80%9D-Wood-Flush-Cut-Blade-Photo1111.jpg

[lentilman]

Can you drill a small hole about 1/4 in from the original hole and then use a file to expand it to remove the wood between the hole and the original cable passage?

[Cinder]

I don't have a round file, nor a flat file small enough to fit.  That is a great idea though!  I managed to get most of the way though... far enough to pull the double connector though the wall, now I need to figure out how i'm getting my second cable though next to it. 

I have the 'pullthough' cable in the hole now, so if a drillbit/chisel nicks it up, it is no big deal.  I think I may just work on chunkin out the side of the hold with the edge of a drillbit. 

Keep the suggestions flowing!  Later, I'll post a picture of how ugly I made the hole look!

[Spork]

I might just clip the end off, pull it back, re-drill, then re-crimp the end.

Now... there may be 300 feet to the end of this, making this plan unmanageable, but from how I picture it, that seems the easiest.

[Cinder]

The problem is that it was routed though an odd angle before they finished the drywall it looks like, so to route it, I'd have to cut an additional hole in the wall/ceiling, of where I'm not 100% sure exactly to cut. 

I think they added built-in bookshelves after they did this, so they probably cut the holes for the book-shelves, ran the coax, then finished the built-ins.  Otherwise, I wouldn't have messed with the existing cable at all, and just routed new!

[lentilman]

Instead of a file you can use a small jigsaw blade in the aux. hole and connect to the original hole by cutting by hand.  You can use a commercial handle for the blade, needlenose vice grips, a homemade rig with popsicle sticks, or just a wrapping of duct tape.  Be careful doing this so you don't cut the insulation of the existing cable.  You can even connect with a curved cut if desired.  Slow and steady will get there.