Oxyma Improves Powertools’ Torque Wrench’s Design and Ergonomics


Powertools develops, manufactures, and markets equipment in areas like high-pressure hydraulics and hydraulic torque wrenches. When the company identified a gap in the market—a lack of tools with good ergonomics, light-weight design, and attractive pricing—they contacted Oxyma for help with their product development.

  • Projektledare Anders Andersson
  • Avslutat 3/20/2014
  • Kund Powertools

Oxyma Improves Powertools’ Torque Wrench’s Design and Ergonomics

The torque wrench and its associated hydraulic pump are used at construction sites, for example, where installation requires workers to climb building cranes. This makes light-weight equipment a must. At other times, workers need to access the deep internal workings of machinery, which also requires that their tools are simple and convenient to use.

Powertools had already come some way in their development work when they decided to enlist Oxyma’s help. They had produced a prototype, but achieving strength proved to be a hard nut to crack due to the powerful forces and stresses that arise when the hydraulic pump is running.

Robert Lund is Powertools’ managing director. He explains:

“We carry out five to six development projects a year, but this was a major project with a large estimated sales volume. We turned to Oxyma for help with calculations and design. The result was fantastic!”

Oxyma began the project by holding a briefing session at Powertools’ premises in Enköping, Sweden. Oxyma then designed proposals and solutions in close cooperation with Powertools by holding cross-checks several times a week.

Strength Calculations Pinpoint Weak Spots

Peter Pinzke was the responsible design engineer at Oxyma:

“Our calculations helped identify a couple of weak spots in the torque wrench’s design. We improved on these, and new calculations showed that the design was viable. One weak spot was the holes drilled in the prototype for mounting accessories. Because these passed right through the device, they created a weak point in the product, so we replaced them with grooves.” 

“We Designed Our Way Out of Safety Problems”

Ergonomics and safety were two more aspects that Oxyma needed to take into consideration as the project progressed.

“Because the tool can be dangerous to handle, involving a risk of crushing, we chose design solutions that avoid this kind of safety issue. For example, we chose to add bow-shaped ‘ears’ that protrude and protect the operator’s fingers when working in confined spaces. Overall, we made the tool a little more intuitive, so it’s easier to understand how it should be used and where to hold it,” explains industrial designer Erik Verrier.

“We’re Very Happy with the End Result”

With Oxyma’s help, Powertools successfully simplified and modularized their torque wrench’s design.

 “Oxyma is a capable company with experienced consultants. Initially, we compared them with another supplier and came to the conclusion that Oxyma integrated design and calculation in a better way. The two capabilities went hand in hand. And it really worked. We’re very happy with the end result,” concludes Powertools’ Robert Lund.