how many holes are they good for?

[2010]

how many holes are 365 drill bits good for in hard 10mm porcelain?

could i guess at 365?

 

[Gazzer]

Nope but they last a lot longer than they claim IMO

 

[Ian]

Used correctly, you'll get anywhere between 10 and 20 holes from one core, depending on tile type. On soft ceramics, even more than that.

 

[EverDon Tiling]

I did 22 40mm holes in ceramic one after the other for toilet flushers and theres still plenty of life left in it.

 

[Deleted member 1779]

40-76 holes in C5 Grade porcelain holes per pack
Approx 10 to 19 holes per drill
(RRP: £29.99)

40-80 holes in C5 Grade porcelain holes per pack
Approx 10 to 20 holes per drill
(RRP: £29.99)

MULTIPACK
40-80 holes combined in C5 Grade porcelain holes small diamond cores
40 holes each for the 16mm - 30mm - 40mm
(RRP: £49.99)

10mm 30-40 holes (twin pack) in C5 Grade porcelain holes small diamond cores
(RRP: £34.99)

 

[2010]

thanks, i will order some over the weekend

 

[poynton phil]

I'm still using the 6, and 8mm ones after about 18 holes each, cant fault them.

 

[Deleted member 1779]

I'm still using the 6, and 8mm ones after about 18 holes each, cant fault them.

Just remember the three basic rules Mr 2010

1) Take your time using them.
2) Dont apply too much pressure to the drill head. Let the drill do the work.
3) Use water. You need this to cool the core and wick away the heat. And also to remove the debris.

Draw back the diamond core every few seconds to allow water to reach the drilling point.
If the water and tile dust mix looks to be the consistency of toothpaste - its running too hot - if its the consistency of milk - you have it perfect.