Rock Products

JAN 2019

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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46 • ROCK products • January 2019 EQUIPMENT & TECHNOLOGY DRILLING & BLASTING Boart Longyear said that the complete series of Longyear Diamond Drilling Bits is now available. All drillers from the newly promoted to the seasoned veteran find the col - or-coded Longyear diamond drilling bits much more effective in obtaining higher productivity, according to the company. The complete Longyear Diamond Bit Series includes a Red, Orange, Yellow, Green, Blue and Purple Bit for a wide range of drilling conditions and ground formations, with each color corresponding to specific hardness ratings found on the stan- dard Mohs hardness scale. "Drillers want to know, which bit to use, how fast will it cut, and how long will it last?" said Chris Lambert, senior prod- uct manager. "The new LongyearBits simply cut faster (right out of the box) and last longer. The new line of color coding is meant to make it easier to select and use bits for every type of ground condition and for every driller experience level." After the initial launch of the Longyear Green Bit in Novem- ber 2017, trials of additional colors in the series of diamond drilling bits have proven successful. Drill crews in Australia tested several Longyear bits including Green, Yellow, and Red Bits over a three-month period after adoption. The combined result of these tests showed a 60 percent improvement over the competition, a full doubling in penetration rate, and placed 23 percent more core in the box. "The new Longyear bits cut faster and last longer," Robert Jex, division manager of U.S. North Coring explained. "These two qualities in a bit are hard to come by. Usually, a bit that cuts faster gets used up faster – which means more tripping to change the bit. The new Longyear bits seem to have the right balance. It's important to select the right bit for the type of rock encountered. Longyear bits make that easier to do. I highly recommend the new Longyear bits – they have improved penetration rates, productivity and outlast any other bit I've used." To date, drilling crews utilizing Longyear bits have improved shift performance, time down the hole, and meters drilled, ultimately placing more core in the box. As a result of suc- cessful testing in both underground and surface coring environments, the complete line of new Longyear diamond drilling bits is now available to drilling companies throughout the world. Boart Longyear, Cat Tricone Drill Bits Designed to Lower Drilling Costs Cat Tricone Drill Bits are designed for the most severe rotary blasthole applications, yet are cost effective for a wide range of drilling needs. The new line includes six diameters ranging from 171 mm (6 ¾ in.) to 311 mm (12 ¼ in.). Their carbide shapes and cutting face arrangements are optimized for high wear resistance and improved rock fragmentation, and the aggressive, long-lasting cutting structure delivers a superior rate of penetration. Caterpillar's heat treatment technology and advanced air-cooled bearing design yields longer bit life and results in lower overall drilling costs. Cat bits also use innovative technology to prevent cut- tings and unbroken rock ridges from inflicting severe wear on the cone. The result is improved working life. Also, the gauge row design improves resis- tance to diameter shrinkage. Cat Tricone Drill Bits have demon- strated significantly lower total cost of drilling in head-to-head tests conducted in mines. Caterpillar, Boart Longyear Offers Diamond Bit Series

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