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  • Getting Out of the Sand Trap

    New Modular Wash Plant At GS Materials Produces Specialty Sand For Pinehurst Golf Club. By Mark S. Kuhar Read More
  • Carrying the Load

    Fracking boom helps Arcilla Mining double production, and it relies on heavy iron and smart financing to keep material moving. By Mark S. Kuhar Read More
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Rock from the Road: Blog and Travelogue

article thumbnailSept. 17, 2014 – I am blogging live this week from Denver, where KPI-JCI and Astec Mobile Screens are holding their annual National Dealer Conference. 

Prime-Time Products

article thumbnailThe new Cat 824K Wheel Dozer builds on the solid performance of predecessor models with engineering refinements in its power train, operator station and structures, and in features that enhance safety, serviceability and machine management. With a net power rating of 405 hp (302 kW) and a maximum operating weight of 74,966 lb. (34,004 kg), the 824K is available with six blade configurations...

Rock Stars

article thumbnailLafarge North America's Presque Isle Quarry in MIchigan celebrated its 60th anniversary by hosting its first annual Stoneport 5K Quarry Run/Walk on Aug., 28, 2014, to benefit the Cancer Center at Alpena Regional Medical Center (ARMC). 
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Manufacturers in Focus

article thumbnailSandvik Construction appointed Crusher Works as the official distributor of its surface drills line in Alabama. Crusher Works will not only be supplying a comprehensive range of Sandvik surface drills, but will also be providing full after-sales support, spare parts and dedicated customer service.

People on the Move

article thumbnailHitachi America Ltd. announced the appointment of Masaya Watanabe as president and CEO. Watanabe succeeds Kenji Nakamura, who has been appointed advisor to CMO, Corporate Sales and Marketing Group of Hitachi Ltd. The appointments will be effective Oct. 1, 2014.

Latest Digital Issue

Off-Highway Diesel Prices


The national estimated average price-per-gallon for off-highway diesel fuel as of Sept. 4 is $3.547. That is lower than the previous comparison price-per-gallon of $3.548.

Rokla GmbH Offers Blasting Alternative


German manufacturer Rokla GmbH has begun production of the latest generation of Webster Hydraulic Cutting Units under the brand name “Rockwheel.” The company is collaboration between Rokla GmbH and British engineer Ian Webster.

The Rockwheel is suitable for use in quarrying, demolition and building renovation, roadwork, trench construction, civil engineering, tunnelling, cutting slots and ditches, frozen ground, special underground engineering, removal of tree stumps and extraction of materials. According to the company, the Rockwheel can be a strong alternative whenever blasting is forbidden or not practical. Rockwheel cutting units work just as well underwater as in dry conditions without having to be modified.

“Our three-part Rockwheel cutting units provide the required maximum performance at all times but are significantly lighter in weight than those of the direct competitors,” said company founder Robert Piasecki. “As a result it is possible to achieve a powerful performance with Rockwheel cutting units – even with smaller excavators.”

All Rockwheel cutting units are equipped with high-torque hydraulic engines and are designed so that the picks, which are mounted on the drums at an optimal angle, can penetrate the material with maximum power.

In the middle-sized and medium-performance class, the Rockwheel cutting units have only three main components: the housing, motor and cutting heads (with picks). Currently the largest Rockwheel cutting unit being produced is for 4-ton excavators with a power of 140 kW to 220 kW.

The cutting heads of the cutting units operate smoothly and quietly while operating and rotate at a speed that achieves outstanding excavation and ensures a clean profile, the company said. The design and power components cutting units are adjusted so that the picks grip strongly and hardly ever bounce.

The Rockwheel is available internationally.

Rokla GmbH, www.rockwheel.com