RM customer Welbers in Wemb, North Rhine-Westphalia, crushes up to 110 tonnes of gravel per hour with their RM 100GO! hybrid, fully electric, connected to the grid. The results speak for themselves because fully electric drive reduces energy costs by around 50%, the total operating costs by 11% per year, and it also protects the environment. The family-owned business also benefits from maximum flexibility. Thanks to the hybrid crusher, they can crush other materials, such as C&D waste, in addition to fully electric gravel processing.


Country: Germany
Machine: RM 100GO! hybrid
Material: Gravel & C&D waste
Feed material: Gravel: 16-x, 32-x, C&D waste: 0-650
Final aggregate size: 0-16mm gravel, 0-45mm C&D waste

Welbers in Germany have been operating a sand and gravel plant for generations. In July 2023, they purchased their first crusher, an RM 100GO! hybrid, to process gravel to the highest quality 0-16 fraction final aggregate. The reason is that the cone crushers they used to hire cannot achieve the quality of results achieved by impact crushers. “With the new RM 100GO! hybrid, we get a much better geometry of aggregate compared to the cone crushers we used to use. Asphalt adheres better and decorative chippings look better; essential criteria for our customers, who range from landscape gardeners and building contractors to private consumers,” says Jonathan Schaffers, Managing Director of Welbers Kieswerke GmbH.

Impressive trials on the company’s premises

Although the German company was initially sceptical about the performance of the RM crusher, a test run in May dispelled their concerns. The long-standing RM dealer Christophel, a competent partner and supplier of mobile processing technology with plenty of experience in gravel plants, organised a test run directly on the customer’s site to demonstrate how the RM 100GO! processes 16-40 mm gravel and oversize feed material of 32-130 mm to produce the highest quality 0-16 mm final aggregate. In addition to processing gravel, Welbers also tested the machine briefly with C&D waste. Indeed, the machine confirmed what many satisfied RM machine owners from the surroundings have already discovered: a finished 0-45 mm final aggregate, as well as a screened oversize aggregate at a high output with good operating costs. The impressive results convinced the customer, and they ordered their RM 100GO! hybrid at the end of May.

Protect the environment and save on fuel costs with hybrid drive

The aim of leaving land in better condition from an ecologically standpoint than it was before excavation started, has always been the philosophy of the Welbers’ family business. That is why they decided to go for the hybrid version of the RM crusher, in addition to capitalising on the grid connection they already had on site. Now nothing stands in the way of emission-free, fully electric operation. An attractive side advantage is the saving on running costs: already high fuel costs are reduced by using electricity. Since taking delivery of the new machine in June, it has already saved EUR 1000 on diesel.


Fully electric crushing: easy and uncomplicated

Previously, hardly anybody processed gravel fully electrically using mobile crushers. If you have an existing connection to the grid, however, this is easier than you might have thought. To power the crusher, Schaffers first connects the 15-metre cable to the grid transformer station and then to the crusher. This simple step sees the machine ready for action in just a few minutes. “We are very satisfied with the crusher because it really delivers the performance it promises in electric mode and does an excellent job of processing gravel,” says Schaffers.

Maximum flexibility & mobility

In addition to cost efficiency and reducing emissions, Schaffers appreciates the additional advantages in terms of the flexibility and mobility of the hybrid crusher. Because the crusher is mounted on a chassis with crawler gear, they can move from processing gravel in electric mode to crushing 0-45 fraction C&D waste directly on site in diesel mode. In contrast to the processing of C&D waste being outsourced, as it was previously, this can now be done flexibly and independently at any location. This level of mobility paired with low-emission drive technology is something that the owner really appreciates. Particularly with regard to the new substitute building materials directive, which took effect in Germany at the beginning of August 2023, because now the company’s major advantage is that they no longer have to constantly obtain proof of suitability from external service providers, but can do that themselves.

They have processed several thousand tonnes of gravel since July, and all without fuel. The company plans to follow a processing schedule, whereby every couple of months C&D waste will be crushed for two to three weeks. The rest of the time they will process gravel in fully electric mode. They will therefore crush around 40,000 tonnes of gravel a year using power from the grid. “The RM 100GO! hybrid is ideal for handling both process applications: C&D waste and natural stone. I am delighted we have found Welbers the perfect solution, which is both cost-efficient and environmentally friendly,” says Christian Knepperges, Sales Manager at C. Christophel GmbH.

Our crushers in action

RM 100GO!

The RM 100GO! is the star among the mobile crushers – a mobile power pack for every application. It is ready for action within minutes and can handle a wide variety of materials extremely quickly. Weighing in at only 29 t when empty, it crushes up to 250 tonnes of material per hour.

Crushing gravel with 90% quartz content

Processing 24,000 tons of gravel with a quartz content of around 90 percent to produce 0-32 mm value grain
– that was the right challenge for the RM 100GO!. The mobile power pack with its wear-resistant hammers rose to this challenge in the Vienna basin extremely economically. Excavator a

Crushing gravel and C&D waste

No matter whether it is C&D waste or part of the 90,000 m³ of gravel crushed annually. A Swiss company is impressed with the 29 tonne light RM 100GO!, giving it top marks for the ease with which it can be quickly transported from one site to the next.

Contact us for more information

[email protected]

+43 732 73 71 17 – 0

Natural rock

Crushing at a high output and low wear, and that in every possible and impossible location, is not an issue for RM crushers. They manage to generate the highest quality value grain from natural stone on site. Depending on the desired combination of machinery. The end result is always cubic aggregate.

Abrasive rock

Quartz gravel, granite and riverbed gravel are not easy to process because high levels of quartz cause high wear. However, RM crushers are designed for such materials: thanks to their compact size they can achieve high throughputs even in tight spaces, producing valuable aggregate directly on site at all times.

Schrefler relies on RM hybrid crusher

Demolition work and mobile recycling have been part of Manfred Schrefler’s range of services since 2016; previously he was known primarily for transport and earthwork. In terms of machinery, the Upper Austrian relies on top quality and always has the very latest technology.

Basalt preparation

Crushed basalt is used for a variety of purposes. Most often, it is crushed to be used as an aggregate in construction projects.

Increase in orders with cuboid final aggregate

In Mexico the RM 100GO! replaces a jaw and cone crusher combination. Basalt with a diameter of up to 500 mm is crushed into different sizes of cuboid final aggregate, which is then reused for asphalt production. Final aggregate grades between 0-19 and 0 25 mm are processed to a high standard without any problems.

RM 70GO! 2.0 crushes hard river basalt

The first mobile RM crusher in Gorontalo, Indonesia, has been in operation since spring 2017. The new RM 70GO! 2.0 replaces several machines at once: instead of using the jaw crusher combined with a cone crusher, this mobile crusher unit processes extremely hard river basalt in a single pass.