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1

Definitely not supposed to wobble in drill mode. I'm going through this same issue w milwaukee sds with warranty. Had a 21" but that got caught up in a tight space and ever since that it wobbles in drill only.mode luckily its fairly new and under warranty.


1

For a hole that diameter in concrete I'd strongly recommend a diamond core cutter. If it's a one-off operation, you can hire one, or you may even find a tradesperson who specializes in drilling such holes for builders and DIYers, using the right tool. Google is your friend. If it were brick or block, I'd look at buying a "longest" small diameter drill (...


3

You could drill another hole from the other side. It takes a bit of careful measurement to get the starting points lined up, and you have to make sure to keep the drill straight... To make sure you're lined up, you could drill a small pilot hole with a drill bit slightly over 4" long. If your pilot hole connects with the hole from the other side, you'll ...


1

A tripod & a lazermeter might be an okeyish solution. level the tripod to the desired height and put & turn on the lazermeter. each point snap it takes on the wall will be paralel.


50

A 1.5" hole (38mm) in concrete is beyond any conventional drill. You might get away drilling empty block, but not a foundation. I'd suggest renting a big rotary hammer drill driver for this job. Most rental places are happy to rent you a suitable bit for the task as well, on the basis if you didn't have the tool you're unlikely to have the proper sized ...


21

If you are using a core bit with a shaft for which there's an extension, you'd probably have thought of that already. As far as I know there's no extension available for SDS plus or SDS max shanks. There are extensions for the "rope" threads and for the 5/8" and 7/8" threads on diamond core bits. The John Henry method is to drill as far as you can, then ...


12

I have extended drills for one-off jobs by soldering (or welding / brazing) a piece of pipe (of a suitable diameter) to the end of the drill and putting an old drill into the other end of the pipe for the drive end. Need to go slow as they tend not to be perfectly straight :) but have got the job done...


3

Before I start - this is a simple task but it's not as simple as it might seem at first glance. I would mount this with flat head machine screws. I would take that lock to the hardware store and see what size fits right in the countersinks (the tapered part). It might be say a size 8 machine screw. Most of are threaded with so that there are 32 threads ...


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