“Can you provide us with a reliable torque system, that is attached to our bolting machine? Can it ensure that every roofbolt installed is torqued correctly, so that the installed support is not under- or over-tensioned?” This is the question frequently asked when Conax Machine Solutions Pty Ltd interacts with with strata control professionals.
The company is now confident they can answer this question. The company’s patented Auto-Torque Spanner has entered the final stages of testing and CMS hopes to bring a final solution to the market by September 2019.
The Auto-Torque Spanner is essentially a torque spanner with an internal cam arrangement that overcomes at a pre-set axial load, when the desired torque loading is achieved. Tests so far indicate an accuracy of greater than 95%, which is very promising. Traditional load indicators on support members, will be susceptible to greater uncertainty. This is due to greater number variables at play, such as manufacturing process variability, steel batch variability, batch acceptance modelling and installation variables. A number of these devices will also not clearly indicate instances of overloading.
CMS’ Auto-Torque Spanner will be on display at the Local Manufacturing Expo, which runs from 21 to 23 May 2019, at Nasrec, Johannesburg. Visitors can find the CMS stand in Hall 9, stand B6.