Tapered bearing | Miniature ball bearing size chart

Miniature bearings with tapered outer ring for shaft sizes from 0.1875" to 0.3125"

See product table below for dimensions and technical drawings

SMB tapered bearings are versatile and can be customised for different applications. Whether you need bearings for high-speed operations, high load conditions, or environments with specific contamination levels, SMB can provide a solution that fits your needs.

These inch-sized taper O.D. miniature bearings feature a slightly tapered outer ring, which simplifies fitting into sheet metal or softer materials like aluminium. The inner ring is wider than the outer ring, eliminating the need for spacers or washers. In addition, the outer ring includes a flange, which helps in locating the bearing within housing and prevents axial movement under thrust loads. The flange also maintains the bearing's position in thin housings, where an interference fit is hard to maintain, and helps secure the bearing in aluminium housings that expand more than the bearing at higher temperatures.

 

Material and performance 

Taper O.D. bearings are typically available in SAE52100 chrome steel but some sizes may also come in stainless steel. Chrome steel versions, with a steel retainer and suitable lubricant, can operate at a constant temperature of 120°C or up to 150°C intermittently. However, above these temperatures, the load capacity of chrome steel is reduced. These bearings are unsuitable for corrosive environments because of the lack of corrosion resistance in the steel material.

Learn more about stainless steel bearings vs chrome steel bearings.

 

Features and benefits 

  • Low friction: Designed to reduce friction during operation
  • Easy fit: Slightly tapered outer ring for easy fitting into sheet metal or aluminium
  • Eliminates spacers: Inner ring wider than outer ring, removing the need for spacers or washers
  • Flange design: Flange on the outer ring helps locate the bearing and prevent axial movement
  • Material options: Available in both chrome and stainless steel for various applications

 

Technical information

Click on INFO in the rows below to view technical drawings of the tapered bearings with load and speed data. Note that maximum loads and speeds are used for theoretical life calculations. It is advisable to operate bearings at significantly lower than maximum load and speed ratings to ensure a reasonable bearing life.

Get in touch with our specialist bearing team today by emailing sales@smbbearings.com or fill in the contact form.

 

Taper bearing size chart

Size chart below

Product Details

BORE

(inch)

O.D.

(inch)

OUTER

WIDTH

(inch)

INNER

WIDTH

(inch)

SMB REFERENCE

MORE INFO

0.1875

0.5632

0.163

0.188

F3ZZ

info

0.25

0.6257

0.226

0.25

F4ZZ

info

0.3125

0.6882

0.226

0.25

F5ZZ

info

Our determination to remain specialised gives us a high level of product knowledge, providing bearing and lubrication solutions to existing or potential customers, whether individuals or large corporations. We don’t just sell bearings, we help to solve your problems. - Chris Johnson, managing director of SMB Bearings.