NTN Corporation (hereafter, NTN) has developed the “Filter Seal Integrated Large Size Bearing”, which combines a large bearing and filter seal into a single integrated unit.
Large industrial machinery bearings not only generally require long-life and maintenance-free operation, but they also need to be able to be used in harsh environments and exhibit greater reliability. Bearings built into devices and equipment that are mainly used outdoors in particular can also became damaged due to foreign matters penetrating into the lubricant or device itself.
The “Filter Seal Integrated Large Size Bearing” developed by NTN prevents penetration of foreign matters within lubricant into the bearing, helping to extend the bearing replacement intervals and further reduce required maintenance.
The filter seal of the developed bearing features a lubricant inlet and discharge opening section fitted with a mesh filter of the appropriate size. This design prevents penetration of foreign matters while limiting interference to the flow of lubricants. The filter seal has been incorporated without affecting the outer dimensions of the bearing itself, which means that no changes are required to the layout of the housing around the bearing unit, and allows the bearing to be replaced at periodic replacement.
NTN is planning to market the “Filter Seal Integrated Large Size Bearing” as a product to improve reliability of industrial machinery used in a variety of different environments including mining and construction machinery where penetration of foreign matters may pose a problem, wind power generators that require long-term use or maintenance-free operation.
* foreign matters: metallic abrasion powder, sand, dust or similar
[Features]
(1) Longer bearing replacement intervals
⇒ The installation of a filter seal fitted with mesh of an appropriate size to allow smooth flow of lubricant helps to prevent penetration of lubricant foreign matters into the bearing, or indentation due to jamming.
(2) Compact design
⇒ Filter seals can be used without changing the outer dimensions of the bearing.
The new product can be used to replace existing bearings.
(3) Usable in vibrating environments
⇒ Usable under excessive vibrating conditions (vibrational acceleration of 10G).
[Applicable bearing sizes]
Large size applications up to outer diameters of approximately 600 mm
[Image of filter seal]
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