OEM Builder Benefits
Companies like Siemens Westinghouse, Hamon Research Cottrell, Boeing, FMC Jetway, want to tighten bolts uniformly and to a specific TENSION, not torque.
Until DTI's came along to use instead of torque, torque was all they had to work with, and still they use torque in many situations. But increasingly companies like these want to install to a uniform clamping force, and to do that with DTI's is easy, and far more accurate than torque. They just close the DTI by tightening the bolt in logical stages until the residual DTI gap is just right. Then they've got a specific bolt tension, regardless of bolt length, quality, diameter, and condition. And their repair depots can do the very same thing too, with a DTI, because it's simple and independent of torque. Some of these applications are now into using SQUIRTER® DTIs, just making the DTI squirt and then rotating the nut a known rotation more. Non-typical bolt preloads are usual, and can be accommodated by the DTI's.
These companies realize that a high uniform clamping force in a well-designed connection is usually the very best insurance against bolt loosening in service.
See a brief powerpoint presentation on our development of a custom Squirter® for the M36 DIN 6914 bolts used in many wind turbine shafts HERE
