Corrosion-Resistant Bearings
Overview
Highly corrosion-resistant bearings are used in tough environments where water, weak/strong acids, alkali, or reactive gases are present.
Our stainless steel, hybrid, Molded-Oil™, and coated bearings stand up to moist and wet environments while our ceramic and ESZ bearings withstand weak acid and alkaline environments. For environments where strong acids and reactive gases are present, we offer ceramic bearings and Aqua-Bearings™.
Product List
Stainless steel bearings, a standard line in our SPACEA Series for special environments, are affordable options especially suited for high-humidity environments.
Features
- Corrosion-resistant
- Resistant to wet/humid environments
Stainless steel bearings provide long-life even when exposed to water splashes, etc.
Applications
- Wide applications
Stainless steel bearings are used in all kinds of machines exposed to high humidity. - Transport/conveyance equipment
Molded-Oil™ bearings feature a special material that provides a continuous supply of lubricating oil, allowing them to stand up to dust-contaminated environments at atmospheric pressure.
Features
- Resistant to wet/humid environments
Molded-Oil bearings provide long-life even when exposed to water splashes, etc. - Improved cleanliness
No need for grease refilling minimizes oil leakage.
Applications
- Washers in semiconductor production
- Washers in hard disk manufacturing
Hybrid bearings combine ceramic balls with fluororesin self-lubricating cages to achieve excellent resistance to corrosion at both atmospheric pressure and in vacuum.
Features
- Grease-free
Lubrication provided by solid lubricant eliminates the need for grease. - Highly corrosion-resistant
Approximately 5 times more resistant to corrosion in water than stainless steel bearings.
Applications
- Fruit washers
- Washing equipment used in fishing/fisheries
Corrosion-resistant coated bearings feature a nickel coating on the outer and inner rings to enhance durability.
They stand up to high-temperature corrosive environments at atmospheric pressure.
Features
- Highly resistant to corrosion
A specialized coating provides excellent corrosion resistance. - Suitable around disinfectants
Coated bearings can also be used in environments with hypochlorous acid and oxonia.
Applications
- Disinfecting equipment
- Etching equipment
ESZ bearings use specialized high-hardness stainless steel to offer better corrosion resistance than martensitic stainless steel.
With 30% greater hardness and corrosion resistance equal to precipitation-hardened stainless steel, these bearings stand up to tough corrosive environments at atmospheric pressure.
Features
- Highly corrosion-resistant
ESZ bearings provide exceptional resistance to corrosion outclassing other stainless steel bearings. - Long-life
Anti-wear properties contribute to long operating life.
Applications
- High-performance film washing equipment
- Beverage sterilizers
With ceramic outer/inner rings and balls, nonmagnetic all-ceramic bearings have self-lubricating fluororesin cages to achieve excellent resistance to corrosion at both normal atmospheric pressure and in vacuum.
Features
- Non-magnetic construction
An all-ceramic structure gives these bearings the highest resistance to corrosion. - Long-life
Anti-wear properties contribute to long operating life.
Applications
- Chemical mechanical polishing/planarization (CMP) equipment
- Electron beam lithography equipment
Aqua-Bearings™ feature special fluororesin outer/inner rings and cages equipped to meet a broad range of applications in water, alkali, and strong acid environments. Aqua-bearings are suitable for corrosive environments at normal atmospheric pressure.
FAQs
Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.
While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.
Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings. NMT uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.
