Applied as a liquid, they form a 100 % contact between mating metal surfaces, eliminating the need for expensive replacement parts, time consuming machining or the use of mechanical methods. OODA Retaining Compounds fill the inner space between components and cure to form a strong precision assembly.

OODA Bond is a retaining compounds secure bearings, bushings and cylindrical parts into housings or onto shafts.

Retaining compounds have found wide acceptance as a standard method for assembling press- and slip-fitted parts. Retaining compounds, a type of anaerobic adhesive, fill the "inner space" between components and cure to form a strong precision assembly.
They increase maximum load transmission capability and uniform stress distribution and eliminate fretting corrosion. Applied as a liquid, they allow 100% contact between mating metal surfaces, eliminating the need for more expensive designs, time consuming machining and even the the use of mechanical methods.

Retaining Compounds:

Retaining compounds are anaerobic structural adhesives that polymerize when the liquid is confined without air between close-fitting metal surfaces. The first and best-known use for anaerobic adhesives is thread-locking, in which a drop of adhesive applied to the threads of a nut and bolt bonds the assembly, prevents vibrational loosening, seals the threads against fluids and moisture, and prevents corrosion and rusting. Manufacturers embraced anaerobic threadlockers as a chemical solution to the mechanical problem of loosening.

Engineers soon discovered another use for anaerobic adhesives: assembling cylindrical metal parts. The retaining compound fills the empty space between the mating surfaces and cures to chemically unitize the assembly. The combination of an interference fit and a retaining compound is much stronger than an interference fit alone.

The cured adhesive fills the inner space between the components and provides a physical and chemical barrier that eliminates fretting, oxidation and galvanic corrosion. The adhesive also seals the interference fit joint against leakage.

Interference fits, commonly referred to as press fits and shrink fits, are traditional methods for joining cylindrical parts. In an interference fit, the inner part—such as a shaft, bearing or bushing—is machined to be bigger than the mating hole of the outer part—such as a gear or housing. The larger part is then forced into the smaller part. Both parts deform slightly to fit together and extremely high friction results between them. The friction is so great that even large amounts of torque cannot separate the parts. They operate as one.

For maximum joint strength and optimal performance, interference fits must be highly precise. Engineers go to great pains to calculate and achieve the appropriate allowance that will provide maximum friction between the parts. This dimensional precision increases both the cost and the time required for component production.

A reliable interference fit puts high levels of stress on the joined components, which limits substrate selection. Only certain materials can withstand the stresses of machining and the forces required to merge the parts. For example, an engineer may not be able to select powdered metal or aluminum for a component because steel is required to achieve the target joint strength.

Adhesives called retaining compounds enable engineers to design robust, lightweight joints at less cost than traditional interference fits by reducing dimensional precision and increasing the selection of viable substrate materials. Retaining compounds provide strength and reliability and are commonly used to secure bearings, bushings, gears and cylindrical parts onto housings or shafts.

Retaining compounds are used in three ways for interference fit joints:

• added to existing interference fit designs to increase joint strength and reliability.
• engineered into new interference fit designs to create smaller, lighter weight assemblies. The parts can be made with relaxed tolerances requiring lower cost machining.
• used to structurally bond a slip fit that eliminates the need for an interference fit. The parts do not need to be machined to tight tolerances, and the joint is as reliable and effective as an interference fit.

Retaining compounds increase the strength and reliability of a traditional interference fit. Interference fits generate strength from the metal to metal contact of surface peaks, which represent only 15 percent of the total surface area of the joint. The liquid retaining compound fills the surface irregularities and clearance gaps between the two parts. It then cures to create a dense, high-strength bond that increases joint strength and achieves maximum load transmission. The cured resin increases the area of surface contact so stress distribution is improved. This enhances joint reliability, reduces equipment downtime and increases part life.

Whether it's an interference fit or a slip fit, components bonded with retaining compounds do not require precise dimensions or a fine surface finish. Bonded interference and slip fits allow relaxed tolerances that are ideal for joining dissimilar metals and translate into lower-cost processing for components. Bonded assemblies experience less stress in the joint and are more robust under differential thermal expansion. So when different substrates are bonded, the assembly maintains its strength better, since the joint does not depend on the interference fit alone.

Retaining compounds prevent fretting corrosion in interference fits. Fretting corrosion results when micro-movement occurs between a bearing and a shaft or housing, causing small sections of the assembly to weld together. When the assembly moves the next time, these small welded sections rip off and result in a cratered surface. By filling the inner space between interference-fit parts, retaining compounds prevent this micro-movement.

Retaining compounds also serve as a sealant that prevents corrosion and leakage and provides a physical and chemical barrier to oxidation and galvanic corrosion. These adhesives are often used to seal core plugs into an engine block and to close off the outer diameter of a rotary seal installed into a housing.

Retaining compounds can replace conventional methods like keyways, press fits,Heat & cold shrink fits, brazing and welding with a quick and simple process that does not require specialized equipment or skilled operators. Unlike brazing and welding, retaining adhesives do not produce hazardous fumes. Bonding is also faster than brazing or welding.

Benefits:

• OODA Very High strength with simplified and less costly designs.
• OODA Can be Reduces dependence on machining tolerances.
• OODA It can Prevents corrosion and fretting.
• OODA After cured adhesive  Load and stress is distributed evenly over the Joint.
• OODA Can be High load transmission and better performance with existing designs and geometry.
• OODA Excellent performance with relaxed tolerances.
• OODA There is a Reductions in the size possible.

Available Size:

Available in all colours , Temperature  range -90deg c to +295 deg C ,available miliery grade ,food grade ,medical grade
Pack sizes – 50ml,250ml,1 liter