Pumps & Motors

Caterpillar’s new Cat 395 excavator is said to offer contractors up to 10% more production, double the structural durability, and up to 20% less maintenance costs than the 390F it replaces. “We increased swing torque and stick force by 10%,” said Brian Abbott, worldwide product manager for Caterpillar large excavators. “These increases enable contractors to […]

In conjunction with IFPE and ConExpo-Con/AGG, Dana Inc. today launched a new series of eight Spicer Torque-Hub drives, expanding the company’s offering of drive and motion technologies for crawler cranes and other large tracked vehicles. With torque ratings from 80,000 to 450,000 N-m, the new drives offer flexible packaging and gear ratios to meet manufacturer […]

Mobile machinery design has its challenges, but it has many benefits as well. A hydraulic pump need not mount near a hydraulic reservoir, and in fact, could be many feet away. A pump may be near the transmission of the vehicle or at a PTO shaft near the truck’s front bumper. As well, valves and […]

Marzocchi Pompe, a manufacturer of high-performance gear pumps and motors based in Bologna, Italy, just introduced its new ELIKA 1P pump at the Automotive CTI Symposium. The event, held in Berlin, focused on intelligent, hybrid and electric vehicle drivetrains. The 1P is the latest addition to the ELIKA family, the low noise, high efficiency and…

The LH30VO Series 20 of hydraulic pumps from Liebherr Components complements the company’s existing portfolio of hydraulic pumps in the medium pressure range. It is based on a modular system that can be adapted flexibly to customer requirements and enable various applications in mobile and stationary hydraulics. The swashplate-type axial-piston unit features a compact housing […]

In our recent hydraulics design series, we’ve looked at how to improve and enhance circuits and systems with an eye toward reducing complexity, lowering costs and improving overall efficiency. Here are a few comments on the effects of some specific types of components discussed, as well as options engineers need to consider in terms of…

Hydraulic cylinder manufacturer Texas Hydraulics, parent company of Hydromotion Inc., acquired Oilgear last year. Melding different companies quite often produces less-than stellar results, but this transition has gone quite well, according to John Tudor, director of strategy and new product development at Oilgear. That’s primarily because all three companies have significant design and engineering capabilities with…

By Jeremy Beale In our series on design concepts for limiting power losses in hydraulic circuits we’ve looked at various applications. These include “high-low” cylinders, displacement-controlled actuators, flow amplification, regeneration and opposite-phased cylinders. Now let’s delve into the use of hydraulic motor two-speed drives. Consider the following load-sensing hydraulic circuit: Suppose that one of the…

By Jeremy Beale In our editorial series covering designs for power-limiting, open-circuit architectures, we first covered high-low cylinder applications and flow-amplification concepts. Let’s now turn to regeneration. For cylinders with small rod diameters, the flow rates on either side of the cylinder are similar. It would then be more practical to use a “regenerative” approach,…

 By Josh Cosford, Contributing Editor The symbols for hydraulic motors, especially in their simpler forms, are very similar to those of hydraulic pumps. If you haven’t already had the chance, see my article on pumps symbols here first. The directional arrow that points inward to accept fluid power energy is the primary difference between pump…

By Jeremy Beale The recent article, Design Concepts for Open-Circuit Architectures, discussed some options for power-limiting circuits. Now let’s consider flow amplification. One approach for reducing valve size and losses is to amplify flow between the directional valve and cylinder. Conceptually, a flow divider is used as a “step-down” transformer, using energy from a high-pressure…

By Jeremy Beale A common problem in industrial hydraulics is the “high-low” cylinder application. It consists of two operating conditions. The first is a low-pressure, high-flow stage. The second is a high-pressure, low-flow stage. A typical example is the compacting cylinder used in recycling machines. As this cylinder extends, pressure slowly builds due to the…

The base symbol for the hydraulic pump (Figure 1) is actually quite simple. It starts with the standard circle and a directional arrow pointing out one end from within that circle. The solid-filled triangle makes this a hydraulic pump while pneumatic pumps (and most pneumatic symbols) are outlines only. There exist no other options for…

Connecting machines and industrial facilities with IT systems holds enormous potential for making production more economical, quicker and intuitive. And while some naysayers see IoT as more hype than reality, the engineers at Bosch Rexroth are making it a practical reality. The company’s new CytroBox hydraulic power unit, with its sleek, intelligent and energy-efficient design,…

Accurate load tests rely on compact, quiet and efficient servohydraulic axes. Contributed by Andreas Schnurrenberger, Global Sales Manager Industrial Systems, Bucher Hydraulics Using energy more efficiently and reducing total operating costs are worthy and ambitious goals. But substantial improvements can seldom be achieved by simply changing components. Innovative hydraulic systems increasingly require new design approaches,…

“Less is more” is becoming increasingly important in hydraulics. With a focus on lowering Total Cost of Ownership, engineers are looking to downsize components and circuits while maintaining the same performance. Such efforts are primarily aimed at cost- and energy-savings. As a result, there is a growing demand for pumps that run at higher speeds.…

Heightened concerns over climate change and global warming are key reasons for the growing interest in zero-emission vehicles. Battery-electric mobile machines, while still mainly in the prototype stage, may require hydraulic-pumps and variable-speed drives to evolve to suit future applications. Hydraulic pumps are high-performance components. However, according to engineers at Bucher Hydraulics, Klettgau, Germany, they […]

Bosch Rexroth has repackaged its compact series of Hägglunds industrial hydraulic motors. The new Hägglunds CA 10 to 40 motors are far smaller and lighter, yet nothing has changed in their output. This gives them unmatched power density, with the unique ability to deliver full torque and full speed simultaneously. The new motors will extend…

[Following is a lightly edited transcript of this webinar] Paul Heney: My name is Paul Heney, and I’m the vice president, editorial director for Fluid Power World. A little background on me, I have a mechanical engineering degree from Georgia Tech, and I’ve been covering the engineering and manufacturing world for more than 20 years.…

SPX FLOW Hydraulic Technologies, a worldwide leader in hydraulic pumps and tools, has broadened its hydraulic power pump range with the addition of the PB Series Cordless Battery Hydraulic Battery Pumps to its portfolio. The new PB Series Cordless Hydraulic Battery Pump was specifically engineered to meet the market demand with increased portability, longer run-time,…

Much has been made of connectivity, the Internet of Things and Industry 4.0. For many businesses, condition monitoring offers the greatest potential for this rapidly expanding technology. But the real value comes when condition monitoring evolves into predictive maintenance, according to engineers at Bosch Rexroth. In simple condition monitoring, sensors track equipment performance and alert…

Now hydraulic workholding systems are easily automated with the new Kurt Automation Pump. The system comes complete with solenoid valves, pressure switches and wire harnesses ready for adding the appropriate connectors that fit a specific CNC controller or other I/O device. This pump system’s modular design allows selection starting with double or single solenoid valves.…

Kinitics Automation announces the availability of the KPP05 piston pump, a shape memory alloy-based positive displacement pump that uses proprietary Bundled Wire technology to deliver a precision stroke. Driven by the company’s KLA05 Linear Actuator, the product requires only AC or DC electrical power to operate, and allows for displacement or pressure control when additional…

The new L7-000S120 hydraulic pump from SC Hydraulic Engineering does not require electricity for operation as it is air operated. It is ideal fo ruse in choke control operations, high flow power units, press applications and hydrostatic testing. The pump is rated for pressures to 12,800 psi with a 100-psi air drive. It offers flows…

Understanding what can go wrong ensures that hydraulic pumps get built right. Every OEM says it wants quality, but the reality is that machine builders can choose from countless hydraulic components that vary widely in performance and price—from cheap, “throw-away” parts to high-quality and, more-expensive, products that are built to last. How does an engineer […]