What drill bit for installing 3mm countersunk masonry screws into brick?

[EllieBee]

 

Hello! 
I have had a look at the step-by-step guide on repairing cracked cornices but I had a few more questions. 
I have purchased the supplies in the guide, including a hammer drill because the walls behind the plaster are brick. I have bought 3mm countersunk masonry screws. 
What drill bit do I need to buy for this project? 

[MitchellMc]

Hi @EllieBee,

If it was the Ramset Black Countersunk Masonry Screws then they are self-drilling and do not require pre-drilled holes. If you were struggling to drive them in, then you could potentially pre-drill them with a 3mm masonry bit.

If the cornice is easily pushed back in position, you might like to squirt some Liquid Nails up behind it and tape it back into position until the adhesive dries. Although this method isn't as secure as adding screws, given your masonry walls, it might be an easier solution.

Please let me know if you have any questions.

Mitchell

[EllieBee]

Thanks Mitchell. I purchased the XU1 corder hammer drill for the job. What attachment do I need to drill the ramset countersunk screws? 

https://www.bunnings.com.au/ramset-black-countersunk-masonry-screw-box-100_p0261458 

[JacobZ]

Hi @EllieBee,

You can use a 3mm masonry bit such as this Kango 3mm x 90mm Masonry Drill Bit to create a pilot hole.

You can then use a Phillips head driver bit such as this IRWIN 69mm PH2 Fastening Bit to drive the screws in.

Let me know if you have any further questions.

Jacob

[EllieBee]

Thanks Jacob! So it doesn’t need to be a special drill bit for a hammer drill?

[JacobZ]

Hi @EllieBee,

Assuming this XU1 500W 13mm Hammer Drill is the one you've purchased, then no it doesn't require any specialised drill bit.

If you have any other questions, please let me know.

Jacob