- Carbide 7mm porcelain tile drill bit (straight shank) + 7mm pro masonry drill bit.
- This Armeg PTC drill bit has diamond-ground tip geometry that bites into tiles, eliminating wander & slip at the start of drilling.
- Armeg PTC drill bits need a constant flow of water at the tip through the entire drilling process.
- Can achieve 15-25 holes in grade 5 porcelain, 50+ holes are possible in lesser grades of porcelain. When it has been exhausted in porcelain it can still be used to drill softer tiles.
- Armeg PTC carbide tile drill bits can also be used in marble, granite, travertine, natural slate, quarry tiles, ceramic tiles, natural stone, limestone, rosemary roof tiles, etc.
- 8mm drill bit pictured, 7mm will be supplied.
Frequently Asked Questions... What speed should the drill bits be used at? The drill bits should be used at the optimum speed range of between 700 and 900 rpm. Drilling outside this speed range will reduce the number of holes achievable.
How quickly should I be able to produce a hole through a porcelain tile? A hole should be produced through a porcelain tile in seconds rather than minutes. Excessive drilling times are usually due to insufficient pressure being applied through the drilling process or incorrect speed setting on the power tool.
How much pressure should I apply whilst drilling? Sufficient pressure should be applied to keep the drill bit progressing through the tile (signified by tile dust being visible in the cooling water). Insufficient pressure will result in premature wearing of the carbide tip.
Why are there two drill bits in my plastic tube? The drill bit with the red wax cover over the tip is the tile drill bit, the other is a professional quality masonry bit for producing the fixing hole behind the tile. Do NOT use the tile bit for drilling masonry!
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