30221 Single Row Tapered Roller Bearing

30221 Single Row Tapered Roller Bearing | Technical Overview

30221 is a metric single-row tapered roller bearing in the 302 series. The nominal bore is 105 mm, outside diameter 190 mm and assembled bearing width 39 mm. The individual inner-ring and outer-ring widths are 36 mm and 30 mm respectively. Use the five dimensions together when comparing a replacement or evaluating an equipment design.

Nominal Boundary Dimensions

Nominal reference dimensions only. Verify specification and available supply against the approved technical record before ordering.

Envelope and Interchange Checks

The radial section calculated from the nominal diameters is 42.5 mm per side. For this 105 mm shaft size, confirm there is adequate room for the 190 mm outside diameter and the 39 mm assembled axial envelope. The 302 family has general metric envelope; the dimensions themselves do not establish a particular load rating, service life or interchange approval.

The dimensional envelope should be checked before decisions about lubrication and installation are made. Check the ring designation, chamfer allowances, shoulder clearances, required tolerance class and cage design if a direct replacement is intended. Two bearings sharing d, D, B, C and T are not automatically identical in internal geometry or performance.

Construction and Load Direction

The tapered roller and raceway geometry is intended to support combined radial and axial loading within an engineered arrangement. The cone assembly (inner ring, rollers and cage) is separate from the cup (outer ring), which can simplify certain mounting operations. A single row normally supports axial force predominantly in one direction; the full arrangement must address force in the opposite direction.

Mounting, Preload and Lubrication

Load direction, fits and lubrication should be confirmed together before deciding on a substitution. Use the approved assembly procedure to check the final setting, shaft and housing fits, ring seating and bearing alignment. Excessive preload can generate heat, while uncontrolled clearance can affect guidance and load distribution.

Specify grease or oil based on the actual speed, temperature, duty cycle, contamination exposure and maintenance approach. This listing does not assign a rated speed, grease grade, clearance or lubrication interval without a verified design-specific source.

Applications to Evaluate

The 302 design family can be considered for shaft supports and gear housings where the combined load and mounting space have been calculated. Actual applicability of 30221 depends on calculated equivalent loads, required bearing life, shaft geometry, sealing conditions, assembly adjustment and the surrounding machine design. No equipment-specific approval is implied by the model number alone.

Request a BEARVEX Quotation

Please send the model 30221, required quantity, destination country, operating load and speed, shaft/housing dimensions, requested accuracy class, lubrication conditions and desired lead time. If available, add a drawing or a photo of the existing part and note whether you require a complete cone-and-cup set. BEARVEX will confirm the exact configuration, technical data, quality requirements, packaging and export details before quotation.