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HEICO-TEC®TENSIONING SYSTEMS ■ Pretension large bolted joints easily, quickly and precisely ■ High preload force due to torsion-free mounting ■ Controlled friction conditions ensure maximum tightening and repeatable accuracy ■ No recovery losses; bolt strength can be fully utilized ■ Tension nuts and reaction nuts are compatible with conventional strength classes according to ISO 898-2 ■ Reusable several times ■ Available as standard from M20 - M160 in property class 8 and M20 - M100 in property class 10 ■ Other property classes, customer-specific sizes, pitches, thread forms or materials are...

HEICO-TEC® PRODUCT OVERVIEW HEICO-TEC® TENSION NUTS Large-Ø Light Series Flat Light Series Flat Heavy Series Replacement for hexagon nut class 8 Replacement for hexagon nut class 10 Replacement for hexagon nut type hex and heavy hex Replacement for hexagon nut type hex and heavy hex Replacement for hexagon nut type hex and heavy hex Large thread diameters Confined spaces Confined spaces Replacement for hexagon nut class 8 Replacement for hexagon nut class 10 Replacement for hexagon bolt ISO 4014 Replacement for socket cap bolt acc. to ISO 4762 Press columns, foundations, thrust rod and so on...

ADVANTAGES OF HEICO-TEC® TENSION NUT HEICO-TEC® TENSION NUT SIMPLE · FAST · RELIABLE SIMPLE A hand-held torque wrench is all you need for tightening and loosening. No special tools are required. This makes maintenance far easier. For a secure joint with a HEICO-TEC® Tension Nut, no electric, hydraulic, or pneumatic tools are needed. All you need is a torque wrench. The HEICO-TEC® Tension Nut is unique in the fact that the pretension force of the large main thread is distributed to many smaller pressure bolts. Because the pressure bolts are smaller, a conventional torque wrench can be used to...

Compared with conventional methods, HEICO-TEC® Tension Nuts offer considerable advantages for tensioning large bolted joints quickly, simply and reliably. Due to the inclined plane of the bolt threads, the turning movement of bolt tightening results in axial elongation and pre-load of the bolt. • Threads are deformed even when proper lubrication is applied. • The deformation of the threads reduces the pre-load, durability and reusability of the bolt. • The torsion stress from thread friction and deformation reduces the axial load-bearing capacity of the bolt. HEICO-TEC® Tension Nuts of grade...

PRODUCT OVERVIEW PRODUCT OVERVIEW STRENGTH CLASS 10 Type Tightening torque per pressure bolt. Tightening torque and preload are proportional, i.e. half the tightening torque results in half the preload. approx. 2/3 of the breaking load of a bolt of strength class 8.8 (tested according to ISO 898-2 up to M120). FVmax is the maximum bolt load (FS) that the tension nut can withstand (i.e. preload + additional bolt load). This force value must not be exceeded. In the event that larger forces have to be generated or endured, the use of HEICO-TEC® strength class 10 is recommended. The exact article...

HEICO-TEC® TENSION NUT (INCH) HEICO-TEC® TENSION NUT (INCH) PRODUCT OVERVIEW GRADE BH PRODUCT OVERVIEW GRADE DH Scan to download the 3D-Data Type Tightening torque per pressure bolt approx. 75% of the max. preload approx. 70 to 75ksi preload in the thread For sizes under 4 3/4", please use the CH or DH series. Scan to download the 3D-Data Type * Tightening torque per pressure bolt For sizes over 5" please use the BH series. *** Approx. 90% of the elastic limit of a bolt according to ASTM A354 grade BC Tightening torque per pressure bolt Approx. 75% of the max. preload Approx. 90% of the elastic...

HEICO-TEC® COMPACT SERIES HEICO-TEC® COMPACT SERIES The HEICO-TEC® Compact Series was specially developed for applications where limited space is available in both axial and in radial directions or, in relation to the classic, high-strength tension nut series (strength class 8 or 10), a more moderate preload level must be generated. Rotating or dynamically loaded components: The target is to generate the optimum out of the available installation space and the maximum preload force that can be generated. n The standard dimension range is M20 - M160 n Available in blank (uncoated) and zinc flake...

PRODUCT OVERVIEW STRENGTH CLASS FL Flat version, light series PRODUCT OVERVIEW STRENGTH CLASS FS Flat version, heavy series Tightening torque per pressure bolt. Tightening torque and pretensioning force are proportional, i.e. half the tightening torque results in half the pretensioning force. Tension nut can be preloaded to nom. preload force. Tension nut can be reactively loaded up to max. preload force. Tightening torque per pressure bolt. Tightening torque and pretensioning force are proportional, i.e. half the tightening torque results in half the pretensioning force. Tension nut can be preloaded...

HEICO-TEC® SECURING METHODS SECURING OF HEICO-TEC® TENSION NUTS HEICO-TEC® Tension Nuts are used in a wide variety of industrial sectors and offer the possibility to generate very high preload forces with the highest tightening accuracy, thereby reducing the risk of self-loosening. For bolted connections that are exposed to strong vibrations or dynamic loads an integration of additional backup methods listed below is recommended: The bolt thread and the contact surface have to be clean and free from burrs. Place the washer on the mating surface and center it. Now hand-tighten the tension nut....

ADVANTAGES OF HEICO-TEC® REACTION NUT ELASTIC · DURABLE · SECURE SPACE SAVING HEICO-TEC® Reaction Nuts are the ideal complement to the HEICO-TEC® Tension Nut for use with through-bolted connections. If you already enjoy the advantages of HEICO-TEC® Tension Nuts for active pre-tensioning, you need an equivalent reactive nut on the opposite end. Due to their special shape, HEICO-TEC® Reaction Nuts can flex elastically. And the more elastic a bolted joint is, the more durable and secure it is against untightening and loosening. In contrast to similar products, HEICO-TEC® Reaction Nuts have the same...