Vortex-i torque tester to hold the sample securely and centrally, so that drive-shaft and centre ring are exactly aligned. Once the disc is placed in the recessed holding plate (reversible to accommodate the two sizes that the disc comes in), the clamp plate is screwed down over it. A probe, which is connected to the torque-sensing transducer, is lowered till its point penetrates the centre ring and can travel no further.The specially made adaptor/jig fits directly over the rotating drive shaft of the
This video introduces the adaptor and shows the test being set up.
The test is designed to test to destruction the join between the centre ring and the abrasive disc. Pressure from the clamp plate ensures the abrasive disc does not spin inside the jig but rotates in unison with the jig.
In this picture, the post-test misalignment of the markings on the disc indicate that the outer abrasive disk has slipped around the centre ring, so this sample has failed. The torque data is exported via the Vortex-i’s RS232 port to the PC for monitoring, analysis, and storage.