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Silver 1/4 inch cobalt tungsten carbide drill bit with ground double flute and four-face tip

ARTU USA INC

ARTU USA INC 1/4 In. x 4-1/8 In. Cobalt Tungsten Carbide Glass Tile Drill Bit

SKU CH-HBA8-NHG8Q

Drills clean holes in porcelain tile up to hardness 8 at 400-600 rpm with a cobalt-tungsten carbide tip that centres without walking

  • Product typeDrill Bits
  • Drills clean holes with no chipping thanks to unique point grinding
  • Starts accurately without walking so tape or centre punching is not needed
  • Double-flute design removes dust fast and prevents clogging during use
  • Suitable for porcelain tiles up to scratch hardness 8 for versatile tiling jobs
  • Operate motor at 400-600 rpm for optimal performance and bit life

Cobalt Tungsten Carbide Drill Bit

This 1/4 inch bit with a 4-1/8 inch overall length is built for drilling glass and porcelain tiles up to scratch hardness 8. The cobalt tungsten carbide tip and unique four-face point grind deliver accurate centering without tape or a centre punch. It suits professionals and DIY users who need clean holes in hard ceramic surfaces.

400 to 600 rpm drill requirement

The bit must be run in a drill motor operating between 400 and 600 rpm for proper performance. A 5/32 inch pilot bit is included to start the hole. The ground double flute clears dust efficiently and prevents clogging during use. No hammer action or impact driver is needed for this accessory.

Low pressure reduces heat and wear

Unique point grinding allows extreme low drilling pressure, which limits heat build-up and extends bit life. The design prevents the bit from walking and produces nice, clean holes with little to no chipping. Normal operation stays quiet and controlled when the rpm range is respected.

How it compares

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

Price $16.99
Cheaper than about 70% of the 5,493 comparable items (median $27.99).

Specifications

Product
Product typeDrill Bits

Questions about this item

What is the maximum safe drilling speed for this bit?

The drill motor must be operated at 400-600 rpm for proper performance and bit longevity.

How much heat builds up when drilling porcelain tile all day?

Running at the specified 400-600 rpm with the ground double flute design allows efficient dust removal, which helps control heat during extended use.

What chuck size do I need to hold the 1/4 In. shank?

A standard 1/4 In. drill chuck is required to secure the shank of this bit.

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