22216EK Characteristics
1. Self-aligning capability
Double-row spherical rollers + spherical outer ring raceway. 22216EK can compensate shaft deflection and angular misalignment (up to ~2°), without extra friction rise. Great for cases where alignment error is unavoidable.
2. Heavy load capacity
22216EK is mainly for heavy radial load, and can carry moderate bidirectional axial load. Higher load rating than cylindrical roller bearings or deep groove ball bearings of same size.
3. Tapered bore (EK)
Bore taper 1:12. 22216EK installs by adapter sleeve, easy mounting, dismounting and clearance adjustment on smooth shaft.
4. Relubrication design
Outer ring with lubrication groove & oil holes for regreasing during service, good for long-running heavy machinery
5. Cage: E-type reinforced cage
Optimized roller guidance, low friction, stable running, better limit speed vs old design.
6. Limitation: Not for ultra-high speed applications, lower speed limit than deep groove ball bearings.
Typical Applications
1. Gearboxes & Industrial Reducers
22216EK is widely fitted on the low-speed, heavy-load output shaft of heavy-duty helical / bevel-helical gear units. Under heavy torque, the shaft tends to deflect and bend. This bearing compensates shaft deflection, avoids edge loading on rollers. The tapered bore design is convenient for field preload and clearance setting on the assembly line or during overhaul. Common in main drive reducers for bulk material lines.
2. Conveyor Systems & Conveyor Pulleys
Drive pulleys, tail pulleys and bend pulleys for belt conveyors (mine, cement, port bulk handling). Pulleys run continuously under heavy tension; shaft deflection and housing alignment error are almost inevitable. The self-aligning function prevents premature failure caused by misalignment. Relubrication groove supports re-greasing without disassembling the pulley, cutting maintenance downtime. It is normally paired with adapter sleeves on smooth pulley shafts.
3. Mining & Aggregate Equipment
- Jaw crushers, cone crushers: used on main eccentric shafts. Large shock radial loads + unavoidable frame deformation during crushing.
- Vibrating screens: suitable for vibratory working conditions. Good resistance to cyclic shock load; self-aligning feature offsets frame distortion from vibration.
- Ball mill auxiliary drive, feeder rotors: continuous heavy radial load, occasional axial thrust.
4. Fans, Blowers & Large Centrifugal Pumps
Large industrial induced draft fans, forced draft fans for cement plants, power plants and chemical plants, plus heavy-duty process pumps. Fan/pump rotors often have slight unbalance and shaft sag. This bearing accommodates shaft sag and installation misalignment. Regular re-greasing can be done online through the oil holes on outer ring. Note: Not for ultra-high-speed small pumps; matches medium-to-large, low-to-medium speed fans.
5. Cement & Building Material Machinery
Rotary kiln support rollers, raw material mill auxiliary shafts, bucket elevators. Cement plant equipment runs 24/7 continuously in dusty, high-temperature surroundings. The tapered bore + adapter sleeve structure makes bearing replacement much easier than cylindrical bore versions on long production lines.
6. Paper & Pulp Machinery
Calender rolls, large winding rolls and drying section drive rolls. Paper machine rolls are long and easy to bend under web tension. Self-alignment protects rollers and bearing seats from misalignment damage; stable running helps maintain uniform paper thickness.