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Henkel offers Loctite 4090 hybrid adhesive for highly stressed joints exposed to vibration

Loctite 4090 cyanoacrylate/epoxy hybrid adhesive

Henkel has introduced the Loctite 4090 cyanoacrylate/epoxy hybrid adhesive for structural bonding applications. 

With a fixture time of five minutes, Loctite 4090 is said to be ideal for applications where handling strength needs to be achieved in minimum time.

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Loctite 4090 offers the fixture speed of an instant adhesive and the durability of an epoxy. Based on Henkel’s Loctite 3090, the new product can fill gaps up to 5mm and is suitable for load-bearing parts as well as plastic parts.

It is suitable for temperatures up to 150°C and can be used to bond highly stressed joints as well as those that are exposed to vibration.

The two-part hybrid is supplied in a 50ml cartridge — complete with five mixing nozzles — which slots into a standard Loctite handgun for application.

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Lightweight ST series torque limiter from Tandler Precision ensures high reliability!.

ST series of torque limiters

Tandler Precision has introduced the ST series torque limiter from RW. 

The tiny 160,000Nm torque limiter is claimed to offer a number of benefits compared with shear pin and hydraulic alternatives.

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According to the company, the ST torque limiter is up to 23 per cent more compact, with respect to outer diameter at a given torque, by comparison with its mechanical competitors. The difference in overall coupling weight in the most extreme case is one ton. 

The RW operating principle utilises disc springs, allowing the ST’s immediate re-engagement following a stoppage. There is no need to replace any expendable parts such as pins or valves, and furthermore its disengagement does not result in hydraulic oil being sprayed onto adjacent components.

The ST torque limiter is also said to be reliable thanks to RW’s patented spring-loaded ball detent design, meaning that the coupling will always disengage at exactly the same torque. The disengagement value is easily set via the torque adjustment range that is engraved on the body of the coupling.

The ST series comprises three application-specific classes: the ST1 is for indirect drives and is suitable for power transfer in heavy machine construction; for direct drives, the ST2 includes in its design an elastomer compensation element that accommodates axial, lateral and angular misalignment; and the ST3 model is configured as a torsion-resistant coupling.

Key features and benefits:

• The ST series torque limiter is lighter in weight than alternative designs, making assembly easier and quicker. 
• It is designed to be easily adjustable and can be serviced in situ.
• Complete reliability is ensured as the coupling always disengages at exactly the same torque.
• The difference in overall coupling weight means that considerably greater circumferential speed is possible.
• Lower overall weight reduces mass moment of inertia as a consequence of lower flywheel mass. In addition to shortening the acceleration and braking processes, the system achieves greater dynamics, which in turn translates into higher productivity.
• If minimal space and high torque are the prerequisites for an application, up to 12 actuation elements can be fitted or the number of disc springs increased to produce greater force. Such measures can increase performance by as much as 25 per cent.
• The ST torque limiter is available for torques from 1,000–160,000Nm in four body sizes and shaft diameters from 40–290mm. 
• Where the ST torque limiter is to be used in aggressive, corrosive environments, a stainless steel version can be supplied. Atex Certification  for hazardous areas Zone 1/21 and Zone 2/22 is also available.

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