Drilling Out Anchors - Cheap Advice

[mobiledynamics]

I plan to drill out some 3/4 double expansion anchors that are currently in brick. Could be single expansion anchor - need to get back uptop the roof to verify OD of the holes they sit in.


Anyhow, the machine bolt itself is 3/8 ...

Presume the metal of these anchors is pretty much flared out onto the brick & and GOAL is to repurpose these holes and use new anchors, how would you attack this.

Methinks I might be going through quite a bunch of bit's just due to the very nature of how it needs to get drilled out.

Do you think it's possible to get something to ~punch~ the backside of the threaded portion out, will the outer sleeve collapse(lose it's expansion against the brick) and I could potentially literally pull the entire anchor out.

 

[Fcvapor05]

I plan to drill out some 3/4 double expansion anchors that are currently in brick. Could be single expansion anchor - need to get back uptop the roof to verify OD of the holes they sit in.


Anyhow, the machine bolt itself is 3/8 ...

Presume the metal of these anchors is pretty much flared out onto the brick & and GOAL is to repurpose these holes and use new anchors, how would you attack this.

Methinks I might be going through quite a bunch of bit's just due to the very nature of how it needs to get drilled out.

Do you think it's possible to get something to ~punch~ the backside of the threaded portion out, will the outer sleeve collapse(lose it's expansion against the brick) and I could potentially literally pull the entire anchor out.

Drilling them out is going to be difficult or impossible.

If it were me, id just chisel out the mortar and replace the bricks. Easy.

 

[Handyfarmer]

use a pipe or pipe like and thread it to the size of the bolt, and use for a guide for the drill may be able to drill it straight,

grind off the bolts, and re-drill the holes and use new bolts in a near by location,

if the same foot area is needed why not use the old bolts?

 

[2oolhound]

Just drill new anchors and leave the old ones.

 

[ddawg16]

Cut flush....and forget....

Drilling them out is more work than it's worth

In most cases...cutting flush lets you use a punch to push the remaining stud in and out of sight

 

[eddieK]

Just drill new anchors and leave the old ones.

YEP - Or cut a small steel plate, anchor it with the existing anchors and attach to this.

 

[Mr_fixit]

take the bolt out , get a new bolt, thread it in loosely, tap it in to knock the one wedge back to its loose position and wiggle it out.
It you had a double expansion anchor in your hand, look at it , see how it works, this will make more sense.