How best to mount metal railing in granite staircase

[jterra]

Hello, We are going to install a metal railing on a staircase made of granite blocks. I wonder how to mount the railing for the best result, with the least risk of cracks in the granite, etc. The company that manufactures the railing recommends a hammer drill and SDS drills for the drilling itself. In addition, I have read about using a chemical anchor/injection bolt. Wondering if that's the right way to go and tips on affordable SDS drills.

Chemical anchors (injection bolts):
This is the most common and safest option for granite and concrete. Drill holes in the granite/concrete, inject a chemical anchoring compound (e.g., epoxy or polyester-based), and then screw the fixture in place. This provides a very strong and durable connection.

 

[Claes Sörmland]

Don't be afraid to drill into granite with a hammer drill and suitable bit. It's easy and doesn't crack. The bits that, for example, Jula sells work well, and their red hammer drill also works fine.

Feels a bit like magic the first time you drill into stone, what has been so impossible is so easy with the right tools.

Ankarmassa seems like the right way to go once you have the hole.

 

[jterra]

Don't be afraid to drill into granite with a hammer drill and a suitable bit. It's simple and doesn't crack. The bits that Jula sells, for example, work well, and their red hammer drill also works well.

It feels a bit like magic the first time you drill into stone; what seemed impossible is so easy with the right tools.

Anchor adhesive seems like the right way to go once you have the hole.

Thanks for the response. I've heard that the bits can heat up significantly and need to be cooled down slowly. Should you have many bits, like 5-10, to rotate them? Is there a risk of slipping at the start when you first begin to drill into the granite, and is there any sensible technique to minimize that risk?