Core Drill. Anyone Used One

Quote:

---

Originally Posted by d2dave

In my case I can't access both sides as it is an external wall on a brick veneer house.

I have loads of Makita 18 volt stuff with plenty of batteries including an SDS drill.
The core bits on ebay that come with an SDS adapter also have a pilot drill.
It is the ones that are designed to screw onto a one and a quarter inch core drill don't seem to have pilot drill.

As my holes are half the size of yours it should be a bit easier.

I was reluctant to go down the path of using a normal drill as my research has suggested that when it jams you risk serious injury,
one case of a broken wrist, whereas the proper core drill has a safety clutch.

I would prefer the Makita drill option though, as this will save me $100 on a core drill.
So, is it safe doing it this way?

---

I am not sure how much I shortned the life of my Makita drill but it is still working OK two years later. I had to go through the inside wall but because I was drilling a 110mm hole there was plenty of clearance for the drill body once I drilled through giprock on the internal wall. With a 50mm hole this may not be possable. I would think it would not be that expensive hireing a core drill & 50mm bit for the amount of time you will need it.

Quote:

---

Originally Posted by 1950landy

I am not sure how much I shortned the life ofof my Makita drill but it is still working OK two years later. I had to go through the inside wall but because I was drilling a 110mm hole there was plenty of clearance for the drill body once I drilled through giprock on the internal wall. With a 50mm hole this may not be possable. I would think it would not be that expensive hireing a core drill & 50mm bit for the amount of time you will need it.

---

I do not need to go right through both walls. I only have to get through the brick to the wall cavity for electrical wiring.

I priced hiring one about six weeks ago. Don't remember how much, but it was more than the $150 I can buy a drill and bit off ebay.

So my question to you is this. Did you have any issues with it jamming and risking hurting your wrists when using in an ordinary drill?

If not, I will go down the path of an SDS adapter and just a bit.

Quote:

---

Originally Posted by scarry

You can get a 50mm dry core for bricks from Trade tools,very cheap.

If it is a very old house,it will be slow going,modern brick,it will go through easy.

Cant borrow a rotary hammer for the job from someone?

Only other option is to hire(or buy)one.

And YES it has to have a pilot drill or it is useless.

---

Paul. House was built early to mid 80s.

Rotary hammer drill, Are you referring to one of the type that uses SDS drills. If so I have two of them. One 240v and an 18volt Makita.

Please use correct terminology, chaps. I wondered what you were on about drilling brick and masonry with a core drill. A core drill is used by a Machinist in a drill press, radial drill, milling machine, magnetic drill press to enlarge an existing hole to required size. Commonly a hole left in a casting by use of a core hence the name core drill. What you are using are annular cutters, rotary broaches, hole saws.

Quote:

---

Originally Posted by Bigbjorn

Please use correct terminology, chaps. I wondered what you were on about drilling brick and masonry with a core drill. A core drill is used by a Machinist in a drill press, radial drill, milling machine, magnetic drill press to enlarge an existing hole to required size. Commonly a hole left in a casting by use of a core hence the name core drill. What you are using are annular cutters, rotary broaches, hole saws.

---

The concrete cutters I use call drilling holes into concrete core drilling...I’m happy with the terminology

Quote:

---

Originally Posted by d2dave

Paul. House was built early to mid 80s.

Rotary hammer drill, Are you referring to one of the type that uses SDS drills. If so I have two of them. One 240v and an 18volt Makita.

---

Yes the one from trade tools is SDS.
But ring before you go as they are sometimes out of stock.
There are a few different sizes.

Just go slow you will be Ok,we have used them hundreds of times,using a Bosch cordless 36V rotary hammer.

Quote:

---

Originally Posted by W&KO

The concrete cutters I use call drilling holes into concrete core drilling...I’m happy with the terminology

---

Thats the common terminology,the contractors around here even have it written on their vans.

"concrete core drilling and cutting"

Quote:

---

Originally Posted by d2dave

I do not need to go right through both walls. I only have to get through the brick to the wall cavity for electrical wiring.

I priced hiring one about six weeks ago. Don't remember how much, but it was more than the $150 I can buy a drill and bit off ebay.

So my question to you is this. Did you have any issues with it jamming and risking hurting your wrists when using in an ordinary drill?

If not, I will go down the path of an SDS adapter and just a bit.

---

I was using an Ozito SDS rotary hammer from Bunnings, no clutch, correct you don't want it to catch & jam , the torque will spin you around, best brace yourself and expect it. If you use a chuck & adaptor it will just slip rather than break your wrist. The work kit was a Makita that looked the same as Ozito but it had a clutch & was forever disengaging.

Quote:

---

Originally Posted by Bigbjorn

Please use correct terminology, chaps. I wondered what you were on about drilling brick and masonry with a core drill. A core drill is used by a Machinist in a drill press, radial drill, milling machine, magnetic drill press to enlarge an existing hole to required size. Commonly a hole left in a casting by use of a core hence the name core drill. What you are using are annular cutters, rotary broaches, hole saws.

---

These are core drills.

Core Drills

Quote:

---

Originally Posted by Bigbjorn

These are core drills.

Core Drills

---

So are these

Concrete Drilling Equipment | Smart Diamond Tools