Bearing Alone info:
3. New SKF (only) bearing alone with krytox: $37.00 (63004-2RS1)+$15.00 Krytox (SKF bearing retail $51.19)Total: $52.00
(Price of repack does not include my labor, covers the grease cost only)
4. You can also send me a bearing of choice if you rather purchase it and I can repack it for $18.00 per bearing. I do not recommend a cheap bearing, please stick with SKF. If you send me a no name bearing I cannot guarantee it due to low quality. There are many 63004-2RS1 bearings that are in the $11-15 range made in china/japan that are not very good.
Krytox® greases and oils provide a thick lubricating film for bearings. This film reduces metal-to-metal contact in the bearings, resulting in superior load carrying capability.
Proper lubrication is achieved by using the correct amount of grease. Too little grease in the bearings causes premature failure. Too much grease at the initial fill or during relubrication can cause overheating of bearings that are running at medium to high speed, resulting in bearing failure. The amount of grease put in the bearing depends on the application and operating speed. For applications such as conveyor rollers and low-speed machinery with DN values (inner race ID in mm x rpm) below 50,000, the bearing can be filled to capacity. For mediumspeed applications, i.e., DN 50,000-200,000, the bearing can be filled 50-70%. For higher-speed systems, the fill is typically 30-40%. Some extreme-speed special applications have grease fills of only 10-15% (see Speed Factor for definition of DN values). Because Krytox® is heavier than hydrocarbon lubricants, its higher density must be considered when determining the fill quantity by weight.
Additives are combined with Krytox® to enhance its ability to protect metallic surfaces from corrosion caused by moisture and oxygen.
Krytox® greases containing anti wear additives have properties that give high specific load carrying capacity and the highest protection against wear.
These soft or fluid greases have free-flowing characteristics. They belong to NLGI penetration classes 0-000 and are often used for lubrication of sealed gear drives.
Extreme Pressure (EP) Greases These heavy-duty greases are used for high loading or slow speeds. EP greases have high load carrying capability and good characteristics under boundary and mixed friction conditions. Krytox® is a naturally good EP lubricant, but additional highpressure additives can be included in the grease
Krytox® lubricants contain only carbon, oxygen, and fluorine. Because hydrogen is not present, these products are nonflammable. They will not burn or support combustion, even in 100% liquid or gaseous oxygen.
Krytox® performance lubricants are not only resistant to oxygen but are inert to virtually all chemicals used in a variety of industries. They are insoluble in most solvents but are soluble in highly fluorinated fluids in some supercritical fluids such as CO2,
Thermal and Oxidative Stability
The temperature at which thermal decomposition of Krytox® oils takes place depends on the test method used and how the point of incipient deterioration is measured. By differential thermal analysis, deterioration occurs at about 470°C (878°F) in the absence of air. The isoteniscope technique shows an initial decomposition point of 355°C (671°F) as measured by excess pressure increase. At 355°C (671°F), the decomposition rate is approximately 0.03 wt% per day. At 399°C (750°F), the decomposition rate increases to 1.3 wt% per day. When tested under nitrogen for 6 hr at 371°C (7000P), Krytox® showed no increase in neutralization number and no significant change in viscosity.
The presence of air does not substantially lower the decomposition point of Krytox® oils. However, in the presence of certain metal oxides, depolymerization of the oil can start as low as 288°C (5500P). During depolymerization, gaseous decomposition products are given off and the remaining fluid is less viscous, but no sludge or gummy deposits are formed.
In most applications, Krytox® oils have proven serviceable for long periods at continuous temperatures up to 288°C (5500P) and intermittent temperatures of 427°C (8000P).
Compatibility with Elastomers and Plastics
Krytox® is compatible with all elastomeric seal materials and engineering plastics. The limiting factor when using Krytox® with any material is the thermal stability of the elastomer or plastic.
Krytox® performance lubricants are compatible with the following common elastomers and plastics: