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Single Row Tapered Roller Bearing 30200 Series is used in light to moderate load applications
1. Product Overview
30200 is a single-row tapered roller bearing, a precision transmission component for light-to-medium load scenarios. It adopts a separable design (inner ring with rollers and cage, outer ring independent), suitable for compact-space, high-speed combined load applications. Its core advantages include low friction, high rigidity, and long service life, making it widely used in industrial equipment, automobiles, medical devices, and other fields.
2. Key Technical Parameters
Parameter
Typical Value
Description
Bore/Outer Diameter/Width
10×30×9.75 mm
Standard size, Suitable for small shaft systems
Contact Angle
~12°
Axial load capacity is approximately 30% of radial load
Dynamic Load (Radial)
9.5 kN
Limit for continuous operation
Static Load (Radial)
7.2 kN
Limit for static/low-speed conditions
Reference Speed
12000 r/min
Recommended for regular working conditions
Limiting Speed
16000 r/min
Safe speed for short-term operation
Material
Bearing Steel (GCr15)
Raceways/rollers undergo quenching and tempering
Clearance
C0 (standard)
Customizable C3 (for high speed) or C4 (for high temperature)
Coating
Standard uncoated
Optional black oxide (anti-corrosion) or nickel plating
3. Performance and Application Scenarios
Performance:
Efficient under light loads (pure rolling reduces friction);
Stable precision (low vibration at high speeds);
Durable and reliable (bearing steel enhances fatigue resistance).
Application Scenarios:
Industrial: Small motors, screw compressors (e.g., 30200 used in DHK screw compressor main transmission systems), micro reducers;
Automotive: Steering knuckles, auxiliary supports for gearboxes, withstanding combined radial and axial loads;
Medical and Civil: Dental equipment (e.g., dental drill spindles), printer paper-feeding mechanisms, fitness equipment drive shafts;
Special Environments: For high temperatures (+120℃), optional C3 clearance + high-temperature grease; for dusty environments, compatible with triple-lip seals.
4. Maintenance and Installation Specifications
Lubrication Requirements:
Grease lubrication: Fill 1/3-1/2 of the bearing space; recommended to use extreme pressure lithium-based grease containing MoS₂ (e.g., ISO L-XBCHB2). For high-temperature environments, shorten lubrication intervals by 30%;
Oil lubrication: For high-speed conditions (dn＞300,000), use oil bath lubrication with viscosity ≥100 mm²/s at 40℃. Regularly test oil contamination (below ISO 4406 18/16/13 class).
Installation Key Points:
Heating installation: Oil bath heating to 80-100℃ (not exceeding 120℃); after hot fitting, axial preload should be controlled within 0.05-0.10 mm clearance range;
Alignment accuracy: Coaxiality error ≤0.005 mm to avoid uneven loading causing early wear.
Monitoring Recommendations:
Vibration analysis: Use acceleration sensors to monitor high-frequency bands (5-10kHz); abnormal characteristic frequencies (e.g., BPFO) indicate early damage;
Temperature monitoring: Normal operating temperature <90℃, temperature rise <40℃; infrared thermography can detect hot spots.
5. Industry Standards and Customization Options
Standard Compliance:
Complies with JB/T 10236-2001 Technical Conditions for Vibration of Tapered Roller Bearings, with vibration velocity ≤1.8 mm/s (Group V);
The 2025 revised ISO 7544 Cleanliness Test Methods requires internal bearing particle size ≤100μm.
Customization Options:
Clearance adjustment: C3 clearance for high-speed (e.g., motors), C4 clearance for high temperatures (+150℃) or large temperature differences;
Coating treatment: Black oxide coating (SKF VA405) improves corrosion resistance; nickel plating is suitable for food-grade equipment;
Seal design: Optional contact rubber seals (dust-proof) or non-contact labyrinth seals (high-sped
Introduction:
1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee
3. Wafangdian Bearing ...
Introduction:
1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee
3. Wafangdian Bearing ...
