Fully electric Sandvik UJ443E meets the growing demands of aggregate production

The new fully electric UJ443E primary crushing unit promises a substantial productivity boost and improved sustainability for aggregate production. This crushing unit offers advanced technology and features that will meet the changing needs of the future. The benefits include improved mobility, easier maintenance and a more productive crushing process. Sandvik’s field tests were carried out in cooperation with three Finnish customers interested in developing the productivity and sustainability of their aggregate operations. The aim of the demonstrations was to collect data on the operation, functionality and performance of the unit in real site conditions.

Three prominent aggregate producers—Swerock, Kamrock, and Maansiirto Veljekset Rinta—were chosen to participate in the roadshow. Their feedback was positive, and the insights gained were highly encouraging. The Sandvik UJ443E was widely regarded as a long-anticipated breakthrough that promises to transform the market for tracked crushing units.

The industry professionals were highly interested in the fully electric track system which offers 20 percent more traction power with no increase in the size or weight of the chassis. The new, more powerful chassis enables better mobility and agility even on tricky uphill terrains. The electric motors provide immediate full-power torque and allow extremely accurate tramming movements, down to fractions of an inch if necessary. The tracks feature three speed settings, and even the lowest offers ample power for relocating the unit on-site. Operators will appreciate the system’s power and accuracy, especially when loading or unloading the unit from a flatbed during site transfers.

As Joni Kokko, who oversees Swerock’s equipment fleet, notes: “The UJ443E mobile jaw crusher with electrically powered tracks proved to be a powerful and precise solution in terms of usability. Unlike previous models, this jaw crusher is fully electric and sets the stage for a greener future”.

The UJ443E can be powered either by an onboard diesel generator or directly from the electrical grid. Electric drive delivers significant cost and productivity advantages: fuel consumption is reduced by up to 30 percent compared to previous models, resulting in a corresponding boost in productivity. The required hydraulic oil volume drops to just 70 liters (less than 18.5 gallons)—a reduction of up to 90 percent versus conventional systems—since the electric chassis eliminates the need for oil. Additional key benefits include longer intervals between maintenance and refuelling for the powertrain, as well as lower local emissions.

The crusher at the heart of the unit is the reliable Sandvik CJ412 jaw crusher with a 1,200 mm x 830 mm (47” x 33”) feed opening. A major innovation is the Optik™ system at the feed station, which automatically relieves any blockages in the crusher by changing the crusher's direction of rotation, rotation speed and jaw position. Crushers have conventionally been unblocked by running the jaws back and forth, which practically requires shutting down the machine. Thanks to the powerful main motor fitted with a frequency controller, unblocking has now been automated for uninterrupted operation, a benefit that received special praise from the customers involved in the field tests.

"The UJ443E crusher combines several innovative solutions. It’s suitable for even the harshest conditions thanks to its robust design and durable technology. Electrification enables highly energy-efficient aggregate production, with significant emission-reduction potential for the entire crushing plant,”says Site Manager Mikko Kaarlela from Kamrock.

This unit features the widest main conveyor available on the market, with a belt width of 1,400 mm (55”), which greatly reduces wear on the feeder box and enhances overall process efficiency. Its remarkable maximum discharge height of up to 4.7 meters (15’ 5”) allows for larger stockpiles, directly boosting productivity. With five hydraulically selectable discharge heights, the system minimizes wear on downstream equipment and reduces dust emissions by eliminating the need to drop material from excessive heights.

A key feature in terms of maintenance and operator safety is the feeder discharge end that can be lifted hydraulically, which makes it much easier to perform maintenance on the grizzly fines chute and replace the stationary jaw of the crusher in a very tight space. Another major maintainability and safety improvement is the possibility to lower the discharge conveyor to ground level. “The unit's maintenance features are well designed and carefully executed. Maintenance can also be carried out on the main conveyor at ground level. Overall, the UJ443E mobile jaw crusher proved to be an excellent solution in our trials,” says Tapani Rinta, Chairman of the Board at Maansiirto Veljekset Rinta.

The field tests of the UJ443E clearly demonstrated the benefits of the machine. The new electrified unit garnered widespread interest among industry professionals, with key aggregate operators participating in the roadshow. “Our industry is increasingly focused on energy-efficient solutions and promoting sustainability. The Sandvik UJ443E will help us substantially improve the sustainability of aggregate production without compromising productivity. We would like to thank all our customers who came to see us during the roadshow tour and especially Swerock, Kamrock and Maansiirto Veljekset Rinta for their test efforts, valuable feedback and the opportunity to showcase our unit at their worksites for the benefit of other industry players,” sums up Pekka Jauhiainen, Sales Manager at Sandvik Rock Processing Business Area.

For further information, please contact:

Annika Männikkö, Territory Manager, Finland and Baltics, Sandvik Rock Processing Tel: +358 40 596 7434 Email: annika.mannikko@sandvik.com

Melissa Baker, Marketing Communications, Mobile Crushers and Screens, Sandvik Rock Processing
Tel: +44 (0)7725 259151 Email: melissa.baker@sandvik.com