Best drill bit for drilling into marco rocks for frag plugs

[TeoTheCoral]

Does anyone have suggestion for best drill big to drill into marco rock for frag plugs ? Thanks

 

[REPOWER]

These low cost bits worked well for me.

https://www.harborfreight.com/titanium-drill-bit-set-29-pc-61637.html

 

[turbonut]

Masonry bit. Habor freight has them


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[TeoTheCoral]

Is that like a burr type with diamond dust? I see them on Amazon. Any size recommendatjkn

 

[TeoTheCoral]

The problem I find is that with regular, screw type of drill sometimes the rock just crack. Maybe a burr type drill with diamond dust might not cause such focal force and crack rocks?

 

[REPOWER]

So the ones I used above, I already had in my tool box so I gave it a shot and worked. The Marcos already had indentations or small crevices and simply drilled through with no issues. I used 1/2 and 5/8. Try to control the drill speed.

The masonry bit Turbonut mentioned will work much better.

https://www.harborfreight.com/masonry-drill-bit-set-5-pc-63074.html

 

[Smite]

The masonry bit doesn’t have the sharpness in the end. Is like welded bead across shaped like an arrow so it shouldnt catch as much.
Also if you’re using a chuck drill, use the clutch. Set it very low so it doesn’t have the torque to crack the rock

 

[TeoTheCoral]

Hello all. What is a Chuck drill? Thanks for all your useful input

 

[TeoTheCoral]

Bought this 3/8. Will it work and is 3/8 big enough of a diameter ? Thanks

 

[TeoTheCoral]

Ended up also getting diamond dusted core drill

 

[Smite]

Hello all. What is a Chuck drill? Thanks for all your useful input

A standard drill. The chuck is the part of the drill you spin to tighten down on a bit. Most chuck drills have clutch setting just behind that that will be a numbered collar you can spin for different settings. Lower the number the sooner the clutch will engage and slip keeping you from over tightening things.

 

[Smite]

3/8" will be pretty close to the base of most frag plugs.

 

[TeoTheCoral]

3/8" will be pretty close to the base of most frag plugs.

Looks like 1/2 is best then. Thanks for the infos. Yes I do have a chuck drill then. I think the punch drill bit with diamond dust should work. Can’t wait to get started

 

[Dwizzle28]

You guys are so smart, never thought about drilling in the rock to insert frag plugs. I just snapped the base of the plugs and glued them on!