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Cobalt tungsten carbide glass tile drill bit with 4-face point and double flute

ARTU USA INC

ARTU USA INC 5/16 In. x 4-1/2 In. Cobalt Tungsten Carbide Glass Tile Drill Bit

SKU CH-N26S-ZYNEG

A cobalt tungsten carbide drill bit for glass and porcelain tiles up to scratch hardness 8, with a ground double flute for dust removal and a 5/32 in. pilot bit included

  • Product typeDrill Bits
  • Clean holes with no chipping thanks to unique point grinding
  • Bit won't walk so tape or centre punching is unnecessary
  • Double flute clears dust fast and prevents clogging
  • Drills porcelain tiles up to scratch hardness 8
  • Operate motor at 400-600 rpm for best results

Precision drilling for hard tile

The 5/16 inch cobalt and tungsten carbide bit is built for porcelain and glass up to scratch hardness 8. Its four-face grind centres the hole without tape or a centre punch and resists walking. The ground double flute clears dust quickly to prevent clogging and extend cutting life.

Ideal for clean holes in brittle surfaces

Installers who need fast, chip-free starts in porcelain, ceramic or glass will benefit from the low-pressure design. The fixed 5/16 inch shank and 4-1/2 inch overall length limit use to drills that accept that shank size and jobs that fit the reach. Buyers who need a different diameter, a longer reach or a hex shank should look elsewhere.

Run only at 400-600 rpm

The bit must be driven between 400 and 600 revolutions per minute. Exceeding that range will overheat the carbide tip and destroy the cutting edges. A 5/32 inch pilot bit is included to help start the hole accurately.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 66% of the 5,493 comparable items (median $27.99).

Specifications

Product
Product typeDrill Bits

Questions about this item

How does the 5/16 inch diameter perform in a real drill motor?

The bit cuts clean holes in porcelain tiles up to scratch hardness 8 with minimal pressure and no walking, eliminating the need for tape or centre punching.

What speed range does the shank design require in practice?

The drill motor must run between 400 and 600 rpm; operating outside this range reduces bit life and hole quality.

What physical clearance does the 4-1/2 inch length and included 5/32 inch pilot bit need to fit?

The overall length is 4-1/2 inches with a 5/16 inch shank, so the chuck must accept that diameter and the work area must accommodate the full bit length plus pilot extension.

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