21309E Double Row Self-Aligning Spherical Roller Bearing 45x100x25mm Mining Reducer Industrial Equipment

The 21309E spherical roller bearing is designed for heavy-load vibrating industrial equipment, featuring strong self-aligning capacity and dual-direction radial & axial load bearing performance.

It is widely used in mining reducers, metallurgical machinery and conveying equipment where shaft deflection and impact vibration frequently occur.

👉 Get a quote within 24 hours for your project

Model:

21309E

Inner Diameter (ID):

45mm

Outer Diameter (OD):

100mm

Width:

25mm

Structure:

Double row self-aligning spherical roller bearing, E high-load reinforced design, cylindrical bore

Material:

GCr15 high carbon chromium bearing steel

Gear Type (if any):

None

👉 Full technical data and drawings available upon request

• Spherical outer ring raceway delivers excellent self-aligning performance to compensate shaft deflection and mounting misalignment
• E reinforced internal structure improves roller layout for higher dynamic load capacity and fatigue resistance
• Double barrel-shaped rollers withstand heavy radial load and bidirectional axial force simultaneously
• Strong anti-shock and anti-vibration performance, stable operation under harsh mining workshop conditions
• Lubrication grooves and holes support convenient regular grease replenishment to extend service life
• Custom clearance grades (C2/C3/C4) and brass/steel cages available for different working conditions

👉 Reduces abnormal wear caused by misalignment and cuts long-term equipment maintenance cost

This bearing is widely used in:

• Mining conveyor speed reducers and crusher auxiliary transmission assemblies
• Metallurgical rolling auxiliary equipment and heavy mixing machinery
• Building material vibrating screens and large fan rotor support parts
• Paper making heavy rollers and agricultural large power transmission equipment

👉 Ideal for customers looking for reliable self-aligning heavy-load spherical bearing solutions

• 25+ years experience in self-aligning spherical roller bearing manufacturing
• Exported to many countries worldwide
• Rich experience in OEM & bulk custom bearing projects
• Strict full-process quality inspection before shipment
• Fast professional technical response within 24 hours
• Stable mass supply for long-term mining and metallurgy factory cooperation

👉 We focus on stable shock-resistant self-aligning performance and reliable long-term partnership

• Raw material composition and hardness inspection
• Precision grinding for spherical outer raceway and barrel rollers
• Standard quenching & tempering heat treatment control
• Heavy load fatigue test and clearance grouping inspection
• Full dimensional final inspection before delivery

👉 Ensuring consistent stable heavy-load self-aligning rotation performance for every bearing