Cyberbond Anaerobic Adhesives

The Cyberbond range of Anaerobic Adhesives and Sealants are solvent free and are a one-component system. These products are relatively unique due to their different strength properties and can be put into groups of, low, medium and high strength grades, making selection of the right product simple. The products cure at room temperature by means of contact with metal and the absence of air.  Different types of metals give different strengths and setting times. The products e.g. cure extremely fast on active metals such as copper or brass, but only reach strength values of approximately 40% of the given values of construction steel. Generally Cyberbond Anaerobic Adhesives and Sealants are used to lock and seal threads, retain threads, shafts, bearings, studs, flanges, etc. The shelf life of Cyberbond anaerobics is one year at room temperature.

T – Threadlocking
Vibration may cause such problems as, self-loosening of threads. By applying the Cyberbond “T” series, this problem is solved. Cyberbond maintains the on-torque given on a thread, which prevents the self-loosening process. At the same time Cyberbond fills the voids in the threads, seals the threads and prevents corrosion. Liquid Cyberbond is simply applied out of the bottle or tube. After assembly it will cure completely and fix the mating parts. The complete thread should be wetted to ensure the load is distributed along the total length of the thread. A slight thixotropic nature of the products helps prevent the product flowing away and is responsible for optimal coverage of the thread. By selecting the correct Cyberbond grade, use of mechanical aids may not be necessary. When choosing a product, consideration should be made to the various strength classes available, together with the material of the thread itself, and its design. If threads need to be disassembled e.g. a nut is positioned in a difficult to reach area, but has to be re-opened later, then no more than a medium strength grade should be used.

R – Retaining of Threads, Shafts and Bearings
Cyberbond durably and reliably retains threads, shafts & bearings. Generally the need to dismantle these joints easily is not required. Therefore the high strength retainers of the Cyberbond “R” series range meet the requirements of these types of joints. When Cyberbond is used a uniform stress distribution throughout the joint is achieved, which means dynamical and static loads can easily be withstood. In contrast to the benefits of these modern liquid retainers, traditional cylindrical assembly methods do have the following disadvantages;

• In the case of press fits or shrink fits high machinery costs are involved and the parts have to be designed very accurately and become very expensive joints.
• In common drive assemblies, pins, splines or adjusting springs are often used which have the disadvantage of fretting corrosion and high punctual stress.
• Due to various elongation figures in different metals a welding or soldering process is quite often limited.

When Cyberbond retainers are selected all these disadvantages disappear. Even when the retainers cure at room temperature, multiple strength values can be achieved, compared to assembly methods where adhesives have not been used. When Cyberbond retainers are used the following advantages are gained;

• Small gaps can be bridged which allows for less costly designed mating parts.
• Friction corrosion is avoided.
• Assembly of parts having different elongation figures is possible.

S – Sealing of Threads
Besides sealing fine threads Cyberbond “S” series can also seal pipefittings due to its ability to resist most chemicals. As with threadlocking the space between the threads is completely filled with adhesive and this seals the fitting. Depending on which sealant has been selected, initial leak tests may be carried out immediately as the liquid sealant cures relatively quickly. Early testing should not exceed 1 bar. After complete polymerisation of the sealant, pressure can be maximised until complete destruction of the joint.
Like any anaerobic adhesive and sealant the selected metals and design of the parts have a huge influence when choosing a Cyberbond sealant. E.g. a larger thread needs more adhesive to fill the space and will give higher torque values when cured. In this instance a low strength Cyberbond sealant should be selected, especially if easy disassembly is required.
Anaerobic sealants are recommended for industrial applications. Use in the building industry should be avoided as leaks are provoked by undefined temperatures and in many cases dirty sealing surfaces. Craftsmen who want to seal defined threads quite often prefer using Cyberbond Anaerobic Sealants, realising the benefits and advantages they have over traditional methods of sealing, such as, Teflon tape or hemp.

S – Sealing of Flanges
In many cases Cyberbond “S” series products are able to replace traditional rigid joint faces. When used to seal a flange Cyberbond offers the advantage of protecting the joint against corrosion. Due to the various strength classes available a designer has the possibility to design different types of joints. E.g. a joint that is easy to disassemble, or the choice to improve the mechanical resistance of the total construction of the joint by selecting a higher strength product. Cyberbond flange sealants are resistant to the more popular oils and gases. Also sealing tests up to1 bar can be carried out immediately when parts have been fully assembled. Another great advantage of the Cyberbond sealant “S”series is that no joint settlement will take place. Compared to traditional rigid flanges there is no need to re-tighten the flange bolts. The storage of just one liquid gasket compared to many solid types offers further benefits.
The application of Cyberbond is simple and very quick. If on a large and fast production line then normally robots or silkscreen methods are used. On smaller production lines or in the case of maintenance then Cyberbond can be applied simply from the bottle or tube. A brush can also be used to distribute the product. Complicated designs and joints are easily sealed using the Cyberbond “S” series of products, but a certain overlap width must be granted (about 5 mm min.; about 3 mm min. around bold holes).