InfraStructures - November 2019 - New Stone Slinger™ OS7 Slings Non-stop For Maximum Production

New Stone Slinger™ OS7 Slings Non-stop For Maximum Production

Bedrock Slinging company bills itself as “the Material Placement Guys” serving Colorado and a growing region around the state. What began as a single conveyor truck that Jordan Kamps purchased in 2003 has now grown into a fleet of 17 mobile material placement systems filling a unique niche in a wide range of construction applications.

The truck fleet quickly became a popular solution with builders and concrete contractors placing gravel fill into foundations or spreading soil or woodchips on landscape projects. The high-speed conveyors off-load the truck by launching the material to the target area in a controlled stream up to 33.5 m away. The system’s precise placement dramatically reduces time and costs for wheelbarrow labor with less waste and cleanup.

The latest addition to Bedrock’s fleet, a Stone Slinger™ OS7 machine, takes the concept and its cost-savings even further. It is the first production unit of its kind from the originator of “slinging” technology.

“The traditional Stone Slinger™ mounts our hopper and high-speed conveyor system to our customers’ choice of truck chassis. The OS7’s built with the same ‘slinging’ technology but without the truck,” explained Scott Nelson, president of W.K. Dahms Mfg. Ltd. “It’s a selfpropelled all-terrain system we designed to stay on the jobsite until the project is done. Instead of running sorties to and from the gravel pit or soil supplier, it’s loaded from onsite stockpiles so it can place material continuously all day long.”

Mr. Nelson estimates that, with efficient loading, the OS7 can accurately spread or place up to 1,600 t of material in a single 8-hour shift. The performance and cost-efficiency of the OS7 has opened new doors for Bedrock Slinging, now taking on major projects from Wyoming to Texas.

The traditional Stone Slinger™ trucks will continue to play a large role in the business of Bedrock Slinging. Truck platforms are still recommended for smaller projects, under 136 t, or those that may require only a partial load, and for jobsites that do not have space available to stockpile material. Most urban residential jobs fall into that category, so Jordan Kamps sees the OS7 focused on industrial and commercial developments.

The OS7 is fitted with a 5.3 m3 hopper and a 66 cm wide live bottom belt, leading into a 5.8 m long high-speed throw conveyor. With its hydraulically-operated wing extensions, the hopper receives material cleanly from larger excavators and loaders, with little spillage. W.K. Dahms worked on its conveyor lift geometry, to give the OS7 additional 3˚ of incline on the throw conveyor. The OS7 Slinger finishes with an approximate discharge height of 3.8 m from ground and can throw material to a distance of up to 40 m, a distance that is even further than Stone Slinger™ trucks.

Remote-Controlled Mobility
The hydrostatic drive that lets operators reposition the OS7 on the jobsite is powered by CAT C4 Tier 4 final engine with direct-coupled hydraulic pumps. The system is operated and steered from a remote-control belt pack, similar to the kit that W.K. Dahms developed for its trucks with Creep Drive™ system. The platform has 4 steering modes: front-wheel, rear-wheel, articulated and crab, which offers an additional advantage over truck-mounted conveyors.

The machine also sits 60 cm lower than previous on-site placement-type systems, allowing access into buildings through bay doors Bedrock could never access before. The rear loading height is just over 1.8 m, so smaller equipment such as skid steers can also be used to feed the OS7.

Source: W.K. Dahms Mfg. Ltd.

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