New BTMC Bolt Gauge from TML
TML have just introduced a new type of bolt strain gauge designed to measure the axial strain in a bolt.
Like their other range of bolt gauges, these require a hole to be drilled in the end of the bolt, but the adhesive used to glue them in is a quick setting cyanoacrylate adhesive type CN. The new BTMC series comes in three different gauge lengths, 0.5, 1 and 3mm requiring different hole diameters of 1, 1.6 and 2mm respectively, and the gauge resistance is 120 Ohms. For optimum results the gauged bolts should be left for one day at room temperature for full adhesive curing, or for quicker setting, after one hour at room temperature, they can be heat cured at 80degC for 1 hour. For further details please ask for a copy of the installation manual.