6324 Heavy-duty Single-Row Deep Groove Ball Bearing For Large-Scale Industrial Machinery | 120×260×55 mm
The 6324 is a heavy-duty Single-Row Deep Groove Ball Bearing engineered for reliable performance in large-scale industrial applications. Featuring a precision-ground deep groove raceway design, this metric bearing is built to accommodate very high radial loads while effectively handling moderate axial loads in both directions. With a 120 mm bore, it is an essential component for large electric motors, industrial pumps, heavy gearboxes, and mining equipment requiring robust load support and operational stability under demanding conditions.
6324 Deep Groove Ball Bearing 120x260x55 mm | 6300 Series | Open Design (Shields or Seals Available)
A large-frame industrial bearing utilizing the proven deep groove geometry to deliver exceptional radial load capacity and smooth rotational performance. Engineered for consistent operation at speeds reaching 2,200 r/min with grease lubrication. The 6324 is manufactured from high-quality chrome steel to withstand continuous operation in demanding environments, making it a trusted component for heavy machinery and power transmission systems where reliability is paramount.

This large-format bearing is ideally suited for a broad spectrum of heavy industrial equipment:
Supplied as an open bearing as standard, the 6324 allows for maximum flexibility in lubrication and customization. To suit specific environmental needs, it can be configured with a variety of closures including single shield (6324Z), double shields (6324ZZ), or rubber seals (6324LLU/2RS) for enhanced protection against contaminants . This adaptability makes it suitable for diverse operating environments from clean medical equipment to harsh mining applications.
Manufactured to standard industrial precision tolerances (P0/ABEC 1), the 6324 ensures consistent quality and reliable performance. The precision-ground deep raceway grooves and high-grade steel balls facilitate stable, vibration-free rotation with low friction torque, contributing to efficient power transmission and reduced noise levels in heavy machinery.
As a large-format 63-series bearing, the 6324 delivers outstanding radial load capacity with a dynamic load rating of 207-227 kN and static load rating of 185-195 kN depending on manufacturer. Manufactured from high-purity chrome steel (GCr15/SAE 52100), its robust construction ensures excellent durability and resistance to wear under continuous heavy loads, guaranteeing extended service life in the most demanding industrial conditions.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 03 Series (63) |
| Basic Designation | 6324 |
| Suffix | Open (Shields/Seals Optional: Z, ZZ, LLU, 2RS) |
| Bore Diameter (d) | 120 mm |
| Outer Diameter (D) | 260 mm |
| Width (B) | 55 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | ABEC 1 / ISO P0 (Standard); ABEC 3 Available |
| Cage Material | Pressed Steel Ribbon (Standard); Machined Brass Available |
| Dynamic Load Rating (Cʳ) | 207 - 227 kN |
| Static Load Rating (C₀ʳ) | 185 - 195 kN |
| Limiting Speed (Grease) | 2,200 - 2,600 r/min |
| Limiting Speed (Oil) | 2,800 - 3,100 r/min |
| Weight (approx.) | 12.5 - 12.8 kg |
Direct replacement and cross-reference for industry standard part numbers:
While the 6324 is supplied as an open bearing as standard, the design allows for customization to meet specific operational requirements:
• Open Bearing (6324): Standard configuration for high-speed applications requiring oil lubrication or custom grease packing.
• Single Shield (6324Z): For basic dust protection on one side with minimal friction.
• Double Shield (6324ZZ / 2Z): Provides excellent protection and grease retention for general industrial use.
• Double Seal (6324LLU / 2RS): For enhanced protection against moisture and fine contaminants in harsh environments.
• Increased Clearance (6324 C3): Recommended for applications where interference fits or temperature differentials may reduce internal clearances.
• Brass Cage (6324 M): For applications requiring higher strength and better guidance at elevated speeds.
"For large electric motors, heavy industrial gearboxes, and mining equipment, the 6324 delivers reliable, high-capacity bearing performance. Specify seal suffixes, C3 clearance, or brass cage options to match your specific operating environment."
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Details
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Details
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Details
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Details
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Details
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