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Stainless steel flanged miniature bearings with extended inner ring for shaft sizes from 0.0469" to 0.3125"
See the product table below for dimensions and technical drawings. For non-flanged options, see product variants below.
These inch-sized miniature bearings combine an extended inner ring with a flange on the outer ring to simplify mounting and positioning. The wider inner ring eliminates the need for separate spacers or washers, while the flange helps locate the bearing within its housing. This combination is useful in compact assemblies where space, component alignment and secure positioning are important.
Extended inner ring for simpler mounting
The inner ring is wider than the outer ring by a total of 0.0312", extending 0.0156" on each side. This additional width provides clearance between adjacent components and the outer ring, allowing a simpler mounting arrangement.
By removing the need for separate spacing components, the extended inner ring can reduce the number of parts required during assembly. However, the complete arrangement should still be checked to ensure that surrounding components do not contact stationary or rotating bearing surfaces unintentionally.
When selecting a bearing, check both the inner and outer ring widths, as well as the bore and outside diameter. These dimensions determine how the bearing fits the shaft, housing and neighbouring components.
Stainless steel instrument bearings
The stainless steel flange provides a locating feature on the outer ring. When seated against a suitable housing face, it helps establish the bearing’s axial position and can resist movement in the direction supported by the flange.
This makes flanged miniature bearings useful where vibration could make it difficult to maintain the bearing’s position. They can also help in assemblies where the housing material expands more than the bearing outer ring as temperatures rise.
EZO flanged stainless steel instrument bearings in this range are manufactured from KS440 stainless steel, also known as ACD34 or X65Cr13. Compared with AISI-440C, this material offers greater load capacity and improved low-noise characteristics.
These properties are relevant when selecting miniature and instrument bearings for compact mechanisms requiring smooth, consistent rotation. For a high precision application, the bearing’s accuracy, internal clearance and mounting arrangement should be considered together.
Choosing an instrument bearing involves more than matching the shaft diameter. Operating loads, rotational speed, environmental conditions and acceptable noise levels all influence the most suitable specification. Stainless steel provides corrosion resistance, but suitability should still be checked for the particular moisture, chemicals or cleaning processes involved.
Operating speeds and temperatures
When fitted with a stainless steel retainer and a suitable high-temperature lubricant, these bearings can operate at temperatures of 250°C continuously or up to 300°C intermittently. Above these temperatures, the load capacity of stainless steel is reduced.
Applications involving high speeds also require careful lubricant selection and attention to operating temperature. A bearing’s suitability depends on the combination of speed, load, lubrication and mounting conditions, rather than any single published rating.
Dimensions, load ratings and technical drawings
Use the product table below to compare sizes and select the appropriate flanged miniature bearing. Click INFO beside a product to view its technical drawing and available load and speed data.
Maximum load and speed figures are used in theoretical bearing life calculations. These ball bearings should normally operate significantly below the stated maximum ratings to support reasonable service life.
If you need an extended inner ring without an outer flange, explore the non-flanged options under Product Variants.
Get in touch with our experienced team today by emailing sales@smbbearings.com or fill in the contact form for guidance on selecting the right bearing for your application.
