Question about eBay diamond hole saws...

[iairj84]

<a href=showthread.php?s=&postid=11462714#post11462714 target=_blank>Originally posted</a> by Ontosrob
Here is one here: Diamond hole saw w/pilot bit

I believe the pilot bit is a diamond drill bit as well.

Do NOT buy the ones with the pilot bits, they're worthless. I ended up not being able to use them as they make the bit chatter on the glass too much... My only reccomendations is to keep the vibration off of the glass.. the best way I found to do it was to cut a hole in a piece of 3/4'' mdf of ply wood (doesn't matter much) and drill a hole with a hole saw the same size as the diamond bit. Then clamp it tightly to the glass and add the water in there. The bit will have no where to chatter and vibrate the glass and it also keep the bit wet as a damming method....

Worked really well for me. use at your own risk

 

[Ontosrob]

Thanks alot! Appreciate the good advise!

 

[draleigh]

i agree with all those who have bought and used the cheapo's. I two have bought the cheap ones and mine are still like new. I drilled 4 holes in my 180 gallon with them, then holes in my 30, 20L, and about to drill my friends 55 all with the same bits. They work fine. As stated, go slow, use lots of cool water to keep the bit cold.

 

[hllywd]

<a href=showthread.php?s=&postid=11459716#post11459716 target=_blank>Originally posted</a> by Ontosrob
Has anybody used the holesaw bits with the "centering bit" style like you would use wood holesaws?

I have a carbide saw I use for water and gas lines through tile, never tried it on glass....

This is what I use for glass, dirt cheap, great customer service, and I've drilled 20 or so holes with the 45mm one.

Tim

 

[BeanAnimal]

The carbide saws will not work for glass or porcelain... you need diamond

 

[BeanAnimal]

The carbide saws will not work for glass or porcelain... you need diamond