Retaining compound is a type of anaerobic adhesive filling the inner space between components and cures to form a strong precision assembly. They are widely accepted as a standard method for assembling press- and slip-fitted parts.
Benefits
When used in combination with interference fits, these compounds allow:
- Higher load transmission and better performance with existing designs and geometry
- Equal performance with relaxed tolerances
- Reductions in the size and weight of an assembly
Advantages over Conventional Assembly
Retaining compound provides significant advantages over conventional assembly methods:
- Pins, key/keyway assemblies have uneven distribution of mass, an imbalance that can lead to vibration at high speeds
- Splines and serrations cause high stresses due to the “notch effect” that occurs in the area of a key. And have high machining costs
- Clamp rings, press fits, shrink fits, and taper fits rely on friction alone to transmit torque, therefore they are limited by material, surfaces, and design. Close tolerances are needed to obtain specific load capacities, leading to high production costs
How to choose the right type?
There are many factors to consider in order to select the “perfect match” adhesive for your application. However, the basic matters you need to make clear in choosing a retaining compound are:
- Is Assembly Badly Worn?
- What Strength is Required?
- What Service Temperature is Required?
Popular Retaining Compound in the market
Loctite 638 Retaining Compound
Loctite 660 Retaining Compound
MXLOC 12603 RETAINING COMPOUND
MXLOC 12609 RETAINING COMPOUND
Key benefits:
- Higher-strength with simplified and less costly designs
- Reduced dependence on machining tolerances
- Corrosion and fretting prevention
- Even load and stress distribution over the joint
Even when you know all the requirements for your applications, it can be hard to select only one most suitable solution in the oceans of solutions out there. Seeking for a professional is definitely a fast and effective way to get your job done.
“Time is money” – they say.
