A high-volume test lab performing tensile tests to ASTM E8/A370 using .505 inch shoulder-end specimens was now also required to test .357, .252, and .161 inch shoulder-end specimens. Their test system configuration included the Model 300LX fitted with a 300 kN spherical alignment tension assembly and shoulder-end specimen holders, along with a 2 inch gauge length clip-on extensometer. They were experiencing difficulty with the existing holders and were concerned about the changeover time required for holders and extensometers, as well as the expense of adding additional extensometers. They were also pursuing Nadcap accreditation and were concerned about the alignment of the load string.

We recommended the newly improved Split Insert Tensile Holders, along with four sets of interchangeable inserts to address the four separate specimen sizes. The new grips installed directly onto the existing spherical tension alignment assembly, reducing average per-test time by 45 seconds thanks to the ease of use and interchangeability of the inserts. Instron Professional Services performed an alignment verification that was well within the specified limits outlined in ASTM E1012 and Nadcap AC7101. The new specimen diameters and lengths also introduced a need for additional extensometers; Instron's automated AutoX750 offered the ability to cover all required gauge lengths in a single instrument.

Instron Split Insert Tensile Grips are the preferred solution for safe, high-volume production testing of shoulder-end or button-head machined specimens. Engineered with an operator-first focus, these grips are easy to install, offer quick-change inserts for standard specimen sizes, and promote efficient testing across a wide range of metals and alloys.