21305 CC
JRZC uses high-purity vacuum-degassed bearing steel as raw material to ensure the quality of CC-type spherical roller bearings from the very beginning. The rings and rollers are treated with Aichelin salt bath heat treatment to guarantee consistent hardness and stable performance. The hardness difference between the bearing rings and rollers is less than 1 HRC, which is 30% stricter than the standard requirement of GB/T 34891-2017.
CC cage ensures low friction and stable operation.
C3 clearance accommodates heat expansion under heavy load.
W33 lubrication groove supports effective cooling and long lubrication intervals.
High fatigue-resistant steel improves durability in harsh environments.
- Dimensions
Bore diameter 25 mm Outside diameter 62 mm Width 17 mm PerformanceBasic dynamic load rating 49.1 kN Basic static load rating 41.5 kN Grease Reference speed 5500 r/min Oil Limiting speed 7500 r/min - Properties
Bore type Cylindrical For Load Direction Radial Number of rows Double row Radial internal clearance CN Tolerance class for dimensions Nomal Tolerance class for run-out P6 Seal type Without Lubricant None Relubrication feature Without - Weight and Material
Product net weight 0.267 kg Roller material Chrome steel Ring Material Chrome steel Cage Sheet metal
The JRZC 21305 CC/C3W33 Spherical Roller Bearing is engineered for heavy radial loads, moderate axial loads, and demanding industrial environments. With a CC cage structure and C3 internal clearance, it offers stable performance during continuous high-speed and high-load operation. The W33 lubrication groove enhances heat dissipation and extends service life, making it ideal for mining, cement manufacturing, metallurgical machinery, and vibrating systems.
FAQ
Q1: Is this model suitable for high-load applications?
A1: Yes, it is designed for heavy-duty radial and combined loads.
Q2: What does W33 mean?
A2: W33 indicates a lubrication groove and holes for enhanced cooling.
Q3: Can it handle continuous high-speed operation?
A3: Yes, the CC cage design supports stable high-speed performance.
