I bought a brand new fancy expensive deadbolt lock for my new apartment, a Medeco Maxum to be exact. The problem is, the old hole for an old deadbolt which I never had the key for is 1/2" too small for the new mechanism. I have a semi-powerful cordless drill, and the appropriate hole bits to drill out the lock, but I cant get any sort of leverage or pull to be able to drill through the wood sandwiched on either side with metal. The drill bit is for metal/wood and is similar to this
, where there is a large hole bit, and a smaller bit inside to initially drill and pull the rest of the bit through the wall straight.
Now I ask you, metafilter, what's the best way to widen this hole? My ideas thus far have been:
- Fill the hole with bondo or similar and see if I can drill it out like that.
- Screw a bit of wood in a T shape with the bottom of the T going through the hole, and then nail/screwing the top of the T to the outside of the door and drilling into that.
Thats all I got. Is there a better/proven way to do this? Should I fill and forget about this old hole? There's already a second lock, and a doorknob, and the old deadbolt is in a good place, anywhere else and it would be awkward.