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‘Color’ series diamond drill bits promote productivity

January 24, 2018  By Ground Water Canada

Jan. 24, 2018 – Boart Longyear has released its Green Bit, the first in a new line of diamond drilling bits.

The Longyear Diamond Bit Color series of diamond coring bits are engineered to drill faster, last longer and outperform existing bit technology, the company said in a press release.

Because small diamonds work harder in a low-torque matrix, drillers should find the color-coded Longyear diamond bits effective in achieving higher productivity, the company said.


The new technology creates a chemical bond between diamond and matrix that is stronger than the diamond itself. The increased diamond projection and improved face flushing create a bit with more versatility, higher penetration rates and longer life, the company said, adding that its smooth drilling characteristics mean increased productivity for the entire operation and more core.

Tapered intermediate waterways improve flushing and prevent accumulation of debris. Designed for fast cutting in competent ground, the bits’ new express geometry is available in 16-millimetre crown heights to maintain bit life at higher cutting speeds.

Proprietary Razorcut protrusions on the face of the bit contain diamonds enable the bit to begin cutting right out of the box – even in the softest ground. The arrangement of these protrusions also improves the tracking and balance in the hole when drilling begins.

The Green Bit is now available in Australia as a result of successful testing by Boart Longyear Drilling Services in underground and surface coring. The company’s Australian drilling crews improved shift performance and ultimately metres drilled, time down the hole and core in the box using the new Green Bit, Boart Longyear said.

“The new Longyear Green Bit simply cuts faster . . . and lasts longer. The new line of colour coding is meant to make it easier to select and use bits for every type of ground condition and for every driller experience level,” said Chris Lambert, senior product manager.

Once successful testing is complete, these additional bits will be available in Australia and later rolled out in other parts of the world.

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