In an independent study at the University of Wisconsin-Milwaukee conducted by Dr. Campbell, a world-recognized authority on hand biomechanics, injury prevention and industrial ergonomics, Ringers achieved the highest rating for protecting hands from high impact while providing the necessary dexterity to successfully complete worksite tasks. Ringers Roughneck 259 glove in the Heavy Duty category, Ringers 665 glove in the Medium Duty–Leather category and Ringers 179 glove in the Medium Duty–Synthetic category all outperformed comparable gloves from some of the industry’s leading brands.
We believe the test results, elaborated in more detail below, provide quantifiable evidence of the value of using task-specific Ringers gloves. And because all of our gloves are engineered with high quality materials and F3 Technology™ to meet fit, form and function criteria, Ringers Gloves optimizes hand protection, dexterity and comfort, with the objective of reducing reportable hand injury incidents and increasing the return on investment.
University of Wisconsin—Milwaukee, Dr. Campbell.
Ringers Gloves engaged the University of Wisconsin—Milwaukee to develop appropriate tests to assess dexterity and impact performance of industrial gloves in the heavy duty, medium duty—leather and medium duty—synthetic categories. Dr. Naira Campbell-Kyureghyan, Professor and Department Chair of Industrial and Manufacturing Engineering in the College of Engineering and Applied Science at the University of Wisconsin, led the testing program. Dr. Campbell teaches and performs research on hand biomechanics, injury prevention, industrial ergonomics and computational modeling. Dr. Campbell also created the Consortium for Advanced Research in Gas Industries (CARGI) to prevent workplace injuries.
Why dexterity and impact protection?
Ringers believes that the key elements of glove performance involve (i) dexterity—the ability to perform a task while wearing a glove and the comfort in wearing the glove to ensure it stays on the hand—and (ii) the protection provided by the glove. In particular we asked Dr. Campbell to focus on impact protection as Ringers does not believe industry standards accurately assess impact protection; furthermore, Ringers does not believe that industry players have performed scientific or independent studies in this field.
Ringers’ sought to develop quantitative assessments of dexterity and impact protection. Dr. Campbell and her staff developed and executed the studies and Ringers had no input on test design or testing methodology. Ringers included all raw data from the study for the 10 gloves compared herein. Ringers applied a 50/50 weighting to dexterity/impact protection measures to derive a total score. Ringers assigned equal weighting to each test within the dexterity and impact protection testing regimes.
Dr. Campbell wrote the following regarding the dexterity tests:
“Hand function is complex, even without wearing protective gloves. Tactile sensitivity, prehension, and dexterity are all influenced by the use of gloves, further complicating object manipulation. 36 subjects completed fit ratings, comfort ratings, pinch strength testing, handgrip strength testing, a rope tying task, and a bolt disassembly task wearing different impact protective gloves. The subjects also provided a dexterity rating for the rope tying and bolt disassembly tasks after completion. Results indicate that user preferences such as glove fit and comfort are important considerations for design… Findings from this study highlight the importance of glove fit, and the need to use anthropometrics for glove sizing, to design gloves for the end user’s task demands, and to consider the environmental conditions and surface contaminants that will be between the gloves and the objects being manipulated.”
Impact protection test.
Dr. Campbell and staff tested gloves to quantify and compare impact force reduction in four distinct zones of the hand—the phalanges (fingers), the metacarpalphalangeal joints (knuckles), metacarpals, the first proximal phalange (thumb)—to evaluate the protection provided by the gloves. The research staff measured forces during testing and calculated the total and percentage force reductions for each glove.
The impact protection test methodology:
“Glove impact testing was performed using a proprietary purpose designed and built impacter apparatus. The impacter features a 7.63 kg mass that has a 10 cm by 3 cm potential impact contact surface that was dropped from a height of 0.1 m or 0.2 m depending on the zone being tested. Zones 1-3 were tested with a drop height of .2 m while zone 4 (thumb) required a drop height of .1 m. At the base of the impacter apparatus was a force plate that measured and recorded the resultant force of the dynamic impact. In addition, peak impact forces were measured via sensors placed on top of the manikin hand being tested, underneath each glove and located at the impact sites. The displacement of the mass was also recorded during impact events. Previous testing by CARGI with cadaver hands directed development of a proprietary manikin hand model. The materials of the manikin have been specially formulated to replicate those of human tissue so as to provide a basis for determining the true protective properties of gloves. The manikin hands were first impact tested without gloves to establish baseline impact values and then with gloves to calculate the impact force reduction provided by each of the seventeen gloves. Large size gloves were used for all the tests.”