In addition to reach and depth, drill bit extension rods also offer increased stability and control during drilling
In addition to their cutting power, carbide tipped drill bits also have a longer lifespan compared to standard steel drill bits. The carbide tip is extremely resistant to wear, meaning that these drill bits can maintain their sharpness and cutting efficiency for a much longer period. This can save you time and money in the long run, as you won't have to replace your drill bits as frequently
Metal case The metal case provides rigidity to the seal, helping it settle on the housing securely. It also ensures easy seal handling and mounting.


Figure 3: Sealing function of main lip radial load
* KOYO is a registered trademark of JTEKT.
Standard 3760/3761
Bonded piston seal
Garter springs are generally used when the lubricant is oil, as it provides the necessary downward force to maintain a tight seal. However, when grease is the lubricant, garter springs can often be eliminated. Due to its low viscosity, grease doesn’t require as much downward force to maintain an effective seal.
What are bearing isolators?
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5. TYPES OF FLUID: Numerous oil seals can interact with oils, fuels, grease, water and more. However, know exactly what type of fluid the rotary shaft seal will be in contact with will ensure the longevity of the seal and the machinery.
Extrusion and Nibbling
Manufacturing and Quality Control
This is one of the frequent reasons for oil seal failure, and this is majorly because of the volatility of any of the elastomer’s constituents. These causative constituents may be part of the elastomer formulation, or gases that got entrapped in the elastomer during the molding process. The deceiving fact about this failure is that sometimes the oil seal won’t show any visual sign of out-gassing, however, sometimes when the out-gassing is extreme, they shrink.
5. Conclusion
* KOYO is a registered trademark of JTEKT.
Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.