Peak Innovations Engineering

Although measurement of the torque applied to a bolt or other threaded fastener during tightening provides sufficient feedback in most applications, there are more specialized tasks where measurement of the fastener tension is essential to ensure the integrity of the mechanical joint. To address this requirement, ultrasonictorque measurement has introduced the USM-3 ultrasonic bolt meter – a compact, lightweight, field-portable unit that gives precise measurement of elongation and load in threaded fasteners. Ultrasonic TorqueMeasurement Traditionally, ultrasonic measurement has been a highly skilled task, requiring extensive knowledge of material properties to determine the correct transducer diameter, the correct transducer frequency, and to interpret the results. The USM-3 overcomes all of these challenges and gives the operator a highly accurate yet easy-to-use tool for determining the tension in a fastener. Real-time, precise bolt measurement can be accomplished in fastene...

Properly designed boltedjoint calculation example is extremely important for striking the balance between the cost and life of the joint. As a design engineer, for a good bolted joint design, for a given loading conditions and materials of the abutments, you have to basically select the following design parameters: diameter or size of the bolt or screw, strength of the bolt or screw, preload or tightening torques, selection of the washers. Bolted machine design Bolted joints are one of the most common elements in construction and machine design. They consist of fasteners that capture and join other parts and are secured with the mating of screw threads. There are two main types of bolted joint designs: tension joints and shear joints. In the tension joint, the bolted joint calculation example and clamped components of the joint are designed to transfer an applied tension load through the joint by way of the clamped components by the design of a proper balance of joint and...

Ultrasonic Bolt Tension Meter (UBTM) measure the elongation produced by tightening a threaded fastener. Our line of monitors can measure the elongation very accurately in fasteners of virtually any material from 1/2 inch to 100 feet in length. The operator uses the to instrument measure the length of a bolt or fastener before it is tightened and again after it is tightened to calculate the delta or change in length. The on-board microcomputer automatically interprets this measurement to display the time (nanoseconds), elongation, load, stress, or %strain from stretching a fastener. Why UBTM is used? In certain critical bolting applications, factors such as friction or bolt/joint geometry are such that the measurement of applied torque alone will not provide the degree of accuracy necessary to control the preload to be monitored over the service life of the fastener. In these applications, ultrasonic measurement of fastener elongation and/or load has frequently proven to be the...

Although measurement of the torque applied to a bolt or other threaded fastener during tightening provides sufficient feedback in most applications, there are more specialized tasks where measurement of the fastener tension is essential to ensure the integrity of the mechanical joint. To address this requirement, manufacturers have introduced the USM-3 ultrasonic bolt meter, which is a compact, lightweight, field-portable unit that gives precise measurement of elongation and load in threaded fasteners. This ultrasonic torque measurement is robust and precise that it can make specialized measuring tasks easier. Bolt Measurement Traditionally, ultrasonic measurement has been a highly skilled task, requiring extensive knowledge of material properties to determine the correct transducer diameter, the correct transducer frequency, and to interpret the results. The USM-3 overcomes all of these challenges and gives the operator a highly accurate yet easy-to-use tool for determining t...