ISMT offers the tightest tolerances in the industry. We are able to do so because of the proprietary processes that we have developed. For example, to ensure tight control over eccentricity (+/- 5%) we provide very high cross sectional reductions during cold-drawing process. Similarly, we use special surface treatment processes that we have developed to ensure good dimensional control and surface cleanliness after heat treatment. In the same vein, to ensure a good surface finish, all our cold-draw tooling is either made from special materials such as Tungsten Carbide or is TiN coated. For applications that demand a superior surface finish, we also offer Bright Annealed tubes.
We understand the importance of tube straightness to the mining industry. Therefore, we subject each and every tube to a stringent 5 point TIR straightness check and correction procedure with special attention to tube end straightness. By doing so, we guarantee a straightness of 1 in 6000 or better.
For Drill Rod tubes, we have developed a unique process that allows us to guarantee very low residual hoop stress of 65 MPa (max). Further information on this special product (used for very demanding drilling conditions) is available upon request.
**Toughdrill™ tubes are manufactured to the following standard specifications, grades, sizes and tolerances. In addition to standard tubes, we also manufacture tubes to customer specific requirements.