Owerview to The ITH Fasteners

The ITH business activities are design, production, and sales of hydraulic bolt tensioning tools, hydraulic torque wrenches,  electric, battery-run and pneumatic power wrenches and more innovative bolting solutions   for tightening and loosening industrial bolt connections from M16 (5/8”) and up.  As a system supplier ITH also delivers standard and special fasteners, engineering, and many other bolting technology services.
 
ITH fasteners are used in all industry sectors like on highly stressed roller bearings on wind turbines or on gas and steam turbines. As ITH manufactures both the fasteners and matching bolting tools for the installation, bolted joints are often designed by ITH (system supplier).
Fasteners are designed due to their application environment and due to the type of stresses (static, dynamic, thermal) they are submitted with.
The scope of ITH fasteners for industrial bolt connections comprises:
 
Thread sizes: M20 (3/4») to W510 (510 mm/20,078”) and larger
Surface treatments: Galvanic processes, zinc lamellar coating, hot dip galvanizing, (PTFE) fluorocarbon coatings, and many more.
Materials: Tempering Steels, High-Temperature, Extreme High-Temperature Steels, Cryogenic Steels, Stainless Steels, and many more.
Products: Hexagonal bolts, Hexagon socket bolts (Allen bolts), Expansion bolts, ITH stud bolts, ITH washers, hexagonal nuts, and round nuts.
The high standard of quality and the large production facilities make it possible to manufacture special bolts in various sizes and tolerance classes. ITH’s supply range begins with thread size M20 (3/4”). The largest thread manufactured to date by ITH was W510 (510 mm / 20”).
 
Mechanical production
 
The mechanical machining of the fastening elements is carried out on state-of-the-art CNC machines with driven tools. The threads (up to M120/5”) are made by ITH using the cold-rolling process. Depending on size and material, the thread is cold-rolled by the continuous or recessing process. Through cold rolling, the root area of the thread is strengthened. This increases the yield strength of the bolt material in edge areas of thread flank and core fillet. At the same time, the internal compressive stresses are created which later overlap with the tensile stresses, thereby creating an overall tensile state (especially in the edge zones of the thread root), which has a positive effect on the life of the bolt. 

Date : 21.09.2018