52387D

Double cone tapered roller bearings consist of a one-piece double inner race (cone) combined with two single outer races (cups). These bearings are designed to handle both radial and axial loads simultaneously, with the tapered geometry ensuring that all contact surfaces meet at a common point on the bearing's central axis. The double cone configuration provides enhanced load capacity and rigidity compared to single-row arrangements.

While single-row tapered roller bearings have separable inner and outer rings, double cone bearings feature a unified double inner race that cannot be separated. This design eliminates the need for inner-ring spacers and provides better axial positioning. Double cone bearings are typically supplied as pre-set assemblies with outer race spacers for simplified installation.

The ideal operating bearing setting is generally near-zero to slight preload to maximize bearing life. Most bearings are initially set with cold end play during assembly, which approaches the desired near-zero setting when the unit reaches operating temperature. Excessive preload must be avoided as it can drastically reduce bearing fatigue life and cause lubrication problems.

No, you should not attempt to disassemble unitized double cone bearings as components may become damaged, affecting performance and service life. These bearings are designed as integrated assemblies and should be replaced as complete units when necessary.

Under standard operating conditions, relubrication should occur every 3,000 operating hours or at six-month intervals, whichever comes first. However, this schedule requires adjustment based on specific conditions - high-speed applications exceeding 3,000 RPM or heavy loads exceeding 70% of the dynamic load rating necessitate more frequent lubrication.

Insufficient lubrication can cause seizure, discoloration, and stepped abrasion on raceway surfaces with spacing equal to the distance between rollers. Evidence of seizure typically appears on the large diameter side of the raceway surface and the large rib surface.

Double cone bearings excel at handling combination loads - simultaneous radial and axial forces. The contact angle determines load capacity characteristics: larger angles provide better thrust load capacity, while smaller angles enhance radial load capacity. They can accommodate single-direction thrust loads but are not suitable for double-direction thrust loads.