Series 100 Proving Rings
The classic series 100 proving ring is the forerunner of the entire current series of Morehouse proving rings. It is perhaps the most widely used and respected proving ring in the world. It has been the field calibration standard preferred by many experienced operators for more than 60 years and most of the original rings still in use. The Series 100 proving ring offers all the accuracy, reliability and consistency ever needed for many force calibrations. It is recommended for calibrating materials, sting machines, torque-measuring dynamometers, thrust strands and other force measuring systems. The micrometer dial is read with a single index line pointer. However, a vernier index pointer is available as an optional accessory. All capacities are available in compression types and combination compression / tension types with threaded external bosses to which pulling rods may be attached for use in tension calibrations.