Benzler Series BD Screwjacks versus Pneumatic and Hydraulic Jacks

May 31, 2016

Now that we've established the screwjack as a highly efficient workhorse lifter, it's time to assess the competition, if any. The Benzler series BD screwjacks, for instance, deliver a comprehensive torque range. Each model in the family is capable of smoothly elevating heavy loads with advanced linear positional aptitude. Conversely, pneumatic and hydraulic jacks are an attractive alternative drive form, but fluid dynamics is a tricky beast to master.

Reliable Lifting Tools

Fluid power is a well-researched and eminently understandable method of transmitting force, but there are disadvantages to be found. A simple faulty seal will quickly compromise the elevating muscle of a fluid lifting tool, which will cause the load to stall as it's being raised or lowered. Not surprisingly, purely mechanical models, especially the Benzler series BD screwjacks, are far more suited for supporting static loads because the mechanism can be physically locked in place.

Positional Features

On considering the self-cushioning properties of a hydraulic jack, there's an advantage here. The dampening characteristics are advantageous when loads require an absorbing feature. Unfortunately, that same property can be viewed as a drawback. A mechanically accurate screw mechanism retains most of the dampening properties associated with the hydraulic model by adding engineering plastics as a buffering mechanism. The upshot of this design move is a mechanism that cushions while delivering superior positional accuracy across an extended axial range.

Frictional Losses

In the past, both fluid energy transmission forms would have won out when pitted against their mechanical cousins. Hydraulic and pneumatic systems tend to avoid heat-producing frictional events by bypassing moving parts, something a standard screwjack can't compensate for because it's a mechanical product, one filled with gears and drive shafts. That's why Benzler series BD screwjacks excel in every industry. They're manufactured from state-of-the-art materials and designed to mesh, one part to the next, to create a beautifully meshed whole that eliminates frictional and vibrational losses. Additionally, the heart of the mechanism, a mechanical worm gear and a trapezoidal lifting screw, multiplies functionality. The resulting mechanism leverages the inherent properties of the worm gear, adding motor-driven power to ratio altering versatility.

Thanks to a worm gear configuration and a tough build that won't ever leak, screwjacks are rapidly achieving dominance within every industry. Hydraulic variants may, arguably, deliver greater lift capacities, but mechanical and electromechanical variants rule every other load domain. They simply make for a superior assembly of torque-manipulating parts, components that satisfy the most demanding positional usage applications.

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