Product3Special Environment Ball Bearings

Bearings for use in special environments such as clean, vacuum, high-temperature and corrosive environments, are required to have special properties, such as non-magnetic, insulating and high-speed.
For this reason, regular bearings made from bearing steel and lubricant such as oil and grease cannot be used.
JTEKT's special environment EXSEV (short for EXtreme Special EnVironment) series meets these requirements.
Stainless is the standard bearing material, however we offer an abundant variety of bearings to suit any given application.
Bearing varieties include corrosion-resistant stainless steel, ceramic, high-speed tool steel, as well as bearings which use solid lubricants such as high-molecular fluorine and molybdenum disulfide coatings, resin or soft metal.

EXSEV series
Radial Ball Bearings
Clean Pro Bearing-RZ
  • Clean
  • Vacuum
Clean Pro Bearing Series Long-Service-Life Type

This bearing has a fluoropolymer gel coating on its rolling surfaces as the lubricant.

Applications:
Semiconductor manufacturing equipment, Transfer systems, Lithography equipment, Vacuum motors, Vacuum equipment
Clean Pro Bearing-RB
  • Clean
  • Vacuum
  • High-temperature
Supports 260˚C Clean, Vacuum Environments

This bearing has a fluoropolymer coating on its rolling surface as the lubricant.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Transfer systems, Vacuum equipment, Sputtering equipment
New Clean Pro Bearing-PR
  • Clean
  • Vacuum
For Clean Rooms, Vacuum Equipment

This bearing is lubricated with a fluoropolymer coating over the entire surface of all bearing components.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Vacuum equipment, Lithography equipment, Sputtering equipment, Vacuum motors
EXSEV®-EX
  • Clean
  • Vacuum
  • High-temperature
The Lubricating Properties of Grease in Clean / Vacuum Applications

This bearing is lubricated with the packed fluorinated EXSEV®-EX (Grease), which is suitable for use in clean environments and vacuum environments.
Compliant with environmental regulations (does not contain PFOA)

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Transfer robots, Vacuum pumps
EXSEV®-FA
  • Clean
  • Vacuum
Basic Specification for Supporting Clean, Vacuum Environments

This bearing is lubricated with a solid fluoropolymer lubricant,which offers superior lubrication performance. The cage is made from a low-particle-emission fluorocarbon resin.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Transfer systems, Inspection systems
Corrosion Guard Pro Bearing-SC
  • Clean
  • Magnetic field
  • Vacuum
  • Electric field
  • Corrosive
For Extreme Corrosive Environments

This bearing uses a silicon carbide ceramic material, which is resistant to strong acids and alkalis.

Applications:
Aluminum electrolytic capacitor manufacturing equipment
Corrosion Guard Pro Bearing-SN
  • Clean
  • Magnetic field
  • Vacuum
  • Electric field
  • Corrosive
Silicon Nitride with Increased Corrosion Resistance

This bearing has its components made of corrosion resistant silicon nitride and is lubricated with fluoropolymer. This bearing can be used even in a highly corrosive solution.

Applications:
Liquid crystal film manufacturing equipment, Aluminum electrolytic capacitor manufacturing equipment, Plating equipment, Synthetic fiber manufacturing equipment, Food container washing machine
Ceramic Bearings
  • Clean
  • Magnetic field
  • Vacuum
  • Electric field
  • Corrosive
Using Ceramics for Various Applications

This bearing has its components made of silicon nitride ceramic and uses fluoropolymer as the lubricant. It is typically used in vacuum and corrosive environments.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Semiconductor inspection equipment, Synthetic fiber manufacturing equipment, Canning machinery, Ultrasonic motors
Corrosion Guard Pro Bearing-ZO
  • Magnetic field
  • Vacuum
  • Electric field
  • Corrosive

This bearing uses ceramic (zirconia) for its material and is lubricated with the solid lubricant of the molded PEEK resin cage. It can be used in corrosive liquids or water and also has excellent impact resistance.

Applications:
High-performance film manufacturing equipment, Cleaning equipment
Corrosion Guard Pro Bearing-MD
  • Clean
  • Vacuum
  • Electric field
  • Corrosive
For Salt Water and Chemical Environments

This bearing uses a stainless steel variety that has excellent corrosion resistance. As the lubricant, fluoropolymer is used. It is compatible with underwater use.

Applications:
Semiconductor manufacturing equipment, Chemical manufacturing equipment, Food machinery, Cleaning equipment
EXSEV®-SK
  • Corrosive
The Standard for Stainless Steel Bearings

This bearing has its components made of stainless steel, and is lubricated with lithium containing EXSEV®-KHD (Grease), which is packed in adequate amounts. This bearing is suitable for use in slightly corrosive environments.

Applications:
Chemical equipment, Transfer systems
Full Complement Ceramic Ball Bearings
  • Magnetic field
  • Vacuum
  • Electric field
  • High-temperature
  • Corrosive
Ultra-high Temperature 800˚C

This bearing has all components made of ceramic for use in an ultrahigh temperature environments. No cage is provided. Being an angular contact ball bearing, this bearing is normally used in pairs.

Applications:
Baking furnace cars, Fans in furnaces
EXSEV®-XT
  • Vacuum
  • High-temperature
Long service life with grease lubrication even at 350˚C

The bearings are filled with fluorinated grease capable of handling high temperatures even up to 350˚C.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Transfer robots, Vacuum pumps
EXSEV®-WS
  • Vacuum
  • High-temperature
Combines 350˚C Heat Resistance and Load Carrying Capability

This bearing has extremely heat resistant tungsten disulfide included in the separator material as the lubricant.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Vacuum evaporatior, Plasma display panel manufacturing equipment
* We recommend that this bearing is used with horizontal axes. For information on using this bearing with items other than horizontal axes, consult JTEKT.
EXSEV®-MG
  • Vacuum
  • High-temperature
Supports Ultra-high Temperature Vacuums

This bearing has silver ion plated on the stainless steel balls, as the lubricant.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Vacuum evaporator, Medical equipment, Vacuum motors
EXSEV®-PN
  • Vacuum
  • High-temperature
Superior Heat Resistance Supporting 300˚C

This bearing has a highly heat resistant solid lubricant, such as molybdenum disulfide included in the cage material.

Applications:
Carton manufacturing equipment, LCD cleaning equipment
EXSEV®-MO
  • Vacuum
  • High-temperature
Basic Specification for 300˚C Support

This bearing has molybdenum disulfide baked on the surface of the stainless steel cage, as the lubricant.

Applications:
Semiconductor manufacturing equipment, LCD manufacturing equipment, Vacuum evaporator, Turbo molecular pump, Rotary furnaces
Non-magnetic Hybrid Ceramic Bearings
  • Clean
  • Magnetic field
  • Vacuum
  • Electric field
Non-magnetic Support in Stainless Steel

This bearing uses non-magnetic stainless steel. It includes fluoropolymer as the lubricant. This bearing can be used in a vacuum environment.

Applications:
Semiconductor manufacturing equipment, Semiconductor inspection equipment, Canning machinery, Superconductivity-related equipment, Welder
Hybrid Ceramic Bearings
  • Electric field
  • High speed
For Insulation and High-speed Applications

This bearing is a standard hybrid ceramic bearing. Lubricated with grease or oil, it can be used as an insulating bearing or high speed bearing.

Applications:
High speed stranding machine guide rollers, Motors, Generators
K series
Linear Motion Bearings
Linear Motion Ball Bearings for Use in Extreme Special Environments

The linear motion ball bearings are a high precision product that moves linearly in axial directions while having rolling contact with the shaft. Having balls, retainer and shields housed in an external cylinder, this compact bearing moves linearly without limit to the stroke distance.

Linear Way Bearing Units for Use in Extreme Special Environments

The Linear Way Bearing Units have a slide unit in which balls circulate, allowing the slide unit to move linearly on the track rail without limit. High precision linear motion can be obtained easily by fixing the slide unit and track rail with bolts.

Cross Roller Way Bearing Units for Use in Extreme Special Environments

The Cross Roller Way Bearing Unit is a linear motion bearing unit consisting of two raceway bases. Each base has one longitudinal plane cut into a V shape, which serves as the rolling surface. Two bases are in contact on each of the other's V-cut surface, and cylindrical rollers with a retainer are placed between the surfaces. Any pair of adjacent cylindrical rollers is directed at right angles to each other, thus enabling smooth and extremely accurate linear motion.

Ceramic Balls
Grease
Related examples of use
Practical realization of the world's first ceramic bearing in 1984
Reliable, corrosion-resistant and suitable for use in solutions
Contact Us