32009 X Deep Groove Ball Bearing
For industrial reducers.
The 32009 X bearing delivers 7426 kg (72.80 kN) dynamic load capacity and is machined to a 45 mm bore with precision tolerances. A compact 45 × 75 × 20 mm footprint built for demanding industrial duty.
32009 X Specifications
Common Searches
Dimensions
Load Ratings
What This Means
Dynamic load (Cr) is the maximum force while rotating; static load (Cor) is the limit when stationary. Apply an ~80% safety margin in design — sustained overload cracks the raceway and shortens service life dramatically.
Speed Limits
What This Means
Above the grease limit heat builds up exponentially; oil lubrication gives far better cooling. Keep continuous operation at ~90% of the limit — exceeding it causes cage failure and seizure.
Material & Quality
What This Means
SAE 52100 chrome steel gives high hardness and fatigue strength; G10 ultra-precision balls hold ±0.25µm roundness. High carbon ensures hardness, chromium adds corrosion resistance.
Vibration Classes
What This Means
V2 is the standard grade; V3 is low-vibration for sensitive drives; V4 is ultra-smooth, made for precision instruments and metrology equipment.
Noise Levels
What This Means
Z2 ≈ library quiet, Z3 ≈ a whisper, Z4 is ultra-silent — chosen for medical devices and bedroom fans where noise must be imperceptible.
Internal Clearance
What This Means
C2 is precise/tight, C0 is the standard, C3 suits hot environments where thermal expansion closes the gap, while C4/C5 are for extra-hot running or interference (tight) fits.
Sealing Options
32009 X-ZZ
MOST POPULARBest all-round choice for clean, high-speed electric motors and fans.
32009 X-2RS
SEALEDFor damp, dirty environments — agricultural and conveyor duty.
32009 X
HIGH SPEEDMaximum speed with external oil circulation in clean enclosures.
32009 X-Z
BALANCEDOne open side for re-greasing while keeping light dust out.
32009 X-RS
SEALEDOne sealed side where only one face is exposed to contamination.
Applications
Motor Drives
- ●Electric motors
- ●Generators
- ●Drive shafts
- ●Automotive axles
- ●Gearboxes
Precision Control
- ●CNC spindles
- ●Positioning units
- ●Automation
- ●Automotive axles
- ●Gearboxes
Light Machinery
- ●Pumps & fans
- ●Conveyors
- ●Power tools
- ●Automotive axles
- ●Gearboxes
A 45 mm shaft, 7426 kg (72.80 kN) dynamic load capacity, max 8.000 RPM and a 45 × 75 × 20 mm mounting envelope. Select the sealing variant to match the operating environment.
Compatible Models & Shaft Requirements
Related Models
Other series with the same 45 mm bore
Shaft Requirements
Application Specific
- ▸High Temperature: C3 clearance recommended
- ▸High Speed: BDR V3 & V4
- ▸Corrosive Environment: Stainless steel
Professional Expertise & Standards
ISO Compliance
Full conformance to ISO 15:2011 boundary dimensions ensures interchangeability with global bearing standards and drop-in fit to existing systems.
Material Science
SAE 52100 chrome steel with controlled carbon and chromium content delivers superior hardness, wear resistance and long fatigue life.
Precision Engineering
C0 clearance suits most applications; C3 for high temperature. h6 shaft tolerance is recommended for correct preload.
Professional Mounting
Correct tools and technique prevent ~80% of premature failures. Never hammer directly — use induction heating or a press fit.
Performance Comparison
In a compact 75 × 20 mm footprint the 32009 X carries 72.80 kN — outperforming many same-size alternatives.
Value Engineering
Best value in the 45 mm class for 72.80 kN performance. A quality bearing lasts 3–10× longer than a budget part.
Frequently Asked Questions
What shaft tolerance does the 32009 X need?
How much load can the 32009 X carry?
How should it be lubricated?
How is it mounted correctly?
What are the common causes of failure?
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