Tork Craft Diamond Core Bit 38mm for Tiles

38mm Diamond Core bit Application:
The diamond Core bit is used to drill holes in:
Ceramic tiles
Marble
Grade 5 porcelain (hardest)
Granite
Glass
Slate The diamond Core cuts faster, smoother and lasts longer than any other Core drills. How to use the diamond Core bit:
The diamond Core drill bit must be used with water at all times when drilling. The water serves as a coolant to prevent the diamonds from overheating. ...The maximum allowable temperature for a diamond Core bit is 500 degreeC. There is no pilot drill with the diamond Core bit. A low rpm rotary drill with a planetary gearbox is required to be used with a diamond Core bit. It is possible to use a cordless drill, but in the lowest gear setting. No hammer action is used.

Tightly fasten the diamond Core bit in the drill's chuck.
Keep the bIt'steady at a 45° angle  with the starting point on the edge of the assigned area to be  drilled whilst the bit is rotating.
A notch will be made (this is normal). 
Gradually move the drill from 45 degree to 90 degree and continue drilling unt  finished.
Allow the diamond Core bit to cool down completely before proceeding t  drill another hole.

Water can be applied by:

spraying water on the surface,
using a wet sponge,
attaching a water feed device. This is necessary when drilling into a 
wall tile.

Please have a look at the video in the tabs above
showing how to use the diamond Core bit.
An indication of the correct spindle speed:

    DIAMOND Core BIT DIAMETER
    SPINDLE SPEED


    Ø5.0mm
    800 rpm


    Ø6.0mm
    600 rpm


    Ø7.0mm
    500 rpm


    Ø8.0mm
    500 rpm


    10.0mm
    400 rpm


    More than 10.0mm (>10.0mm)
    less than 400 rpm

Important:
The tool life will mostly depend on the proper usage and the hardness of the items
drilled into. It is normal for a diamond Core bit to last up to 10 or more
drilled holes in hard tiles. Please remember to always use
water when drilling with diamond Core Bits. What’s in the box
1 x Diamond Core Bit 38mm for Tiles