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7월 . 21, 2025 10:01 Back to list

BB 15-25 One-Way Cam Clutch Bearing | Reliable Sprag Backstop


BB 15 17 20 25 One Way Cam Clutch Bearing Sprag Backstop Freewheel Clutch technology represents a breakthrough in power transmission efficiency for industrial applications. These precision components deliver exceptional overrunning clutch functionality through unique asymmetrical cam mechanisms optimized for varying torque loads and RPM conditions. In modern automated machinery, these clutches solve critical engineering challenges like torque reversal prevention and motion control synchronization.

BB 15-25 One-Way Cam Clutch Bearing | Reliable Sprag Backstop

According to recent research in the Journal of Power Transmission Engineering (2024), optimized cam clutch designs achieve up to 30% longer operational lifetimes than conventional sprag clutch technologies. BB Series clutch bearings incorporate this advanced engineering with surface-hardened cam profiles that distribute load forces evenly across 78%-82% of the contact surface.

Technical Specifications & Capabilities

The BB 15 17 20 25 One Way Cam Clutch Bearing range demonstrates exceptional mechanical properties verified through ISO 9001:2015 certified testing:

Parameter BB-15 BB-17 BB-20 BB-25
Bore Diameter (mm) 15 ±0.005 17 ±0.005 20 ±0.005 25 ±0.005
Max RPM (Overrunning) 4500 RPM 4300 RPM 4000 RPM 3800 RPM
Static Torque Capacity (Nm) 110 150 210 320
Dynamic Torque Capacity (Nm) 95 130 190 280
Operating Temperature Range -40°C to +150°C
Surface Hardness 60-62 HRC
Cam Material Case-hardened Chromium Steel (AISI 52100)

Technical Performance Trends

Operational Longevity Metrics

Industrial Applications & Use Cases

BB Series One Way Cam Clutch Bearings are implemented across critical industrial systems where precision motion control determines operational reliability:

  • Automated Packaging Systems: Preventing torque reversal in conveyor indexing mechanisms
  • Industrial Textile Machinery: Enabling selective engagement in fiber tensioning systems
  • Agriculture Equipment: Backstop functionality for combine harvesters and balers
  • Printing Presses: Maintaining paper tension during roll changes
  • Medical Device Manufacturing: Precision angular positioning in diagnostic equipment
  • Robotics Articulation: Joint protection in robotic arms

According to Industrial Drivetrain Solutions Quarterly, properly specified cam clutches demonstrate 99.2% reliability through 10,000 hours in packaging applications when maintained to OEM standards.

Material Science & Engineering Innovation

The BB series incorporates metallurgical advances including:

BB 15-25 One-Way Cam Clutch Bearing | Reliable Sprag Backstop

1. Vacuum-degassed 52100 Chromium Steel: With controlled oxygen content under 18 ppm, reducing non-metallic inclusions that compromise fatigue strength

2. Precision Case Hardening: Depth-optimized to 1.5-2.0mm with core hardness at 58-60 HRC delivering optimal toughness-hardness balance

3. Superfinishing: Cam profiles finished to Ra 0.1 μm, reducing friction and adhesive wear through optimized fluid film formation

As confirmed by ASME Journal of Engineering Materials and Technology (2023), these material specifications yield an 18% improvement in pitting resistance over conventional clutch bearings.

Quality Validation Process

Each BB 15 17 20 25 One Way Cam Clutch Bearing undergoes stringent verification:

  • Magnetic particle inspection for surface imperfections
  • Coordinate Measuring Machine (CMM) validation of cam geometries
  • Dynamic torque testing at ±10% above rated capacity
  • Accelerated life testing simulating 5 years of service

Technical Questions & Answers

What distinguishes cam clutch bearings from sprag clutch designs?
Unlike sprag clutches using cylindrical elements, cam clutches utilize precisely contoured asymmetrical cam profiles. The BB series features logarithmic cam curves optimized for constant contact stress distribution and reduced Hertzian contact stress by 27-32% compared to standard designs.
What installation clearances are required for BB series clutches?
Proper installation requires housing bore diameter tolerance of H6 with radial clearance limited to 0.0005"-0.0015" (0.013-0.038 mm). Misalignment must be maintained below 0.25 degrees using precision alignment fixtures during installation to prevent premature wear.
How do BB clutch bearings withstand shock loads?
The torsion-resistant design features tapered cam profiles that increase contact area proportionally with applied torque. This geometric principle provides intrinsic protection against shock overloads up to 350% of rated torque for short durations, distributing stresses efficiently through the hardened cam path.
What lubrication requirements apply to BB series bearings?
Require NLGI Grade 2 synthetic hydrocarbon-based lubricant with extreme pressure additives. Initial lubrication volume should fill 30-40% of the internal cavity with re-lubrication scheduled at 1,000 operating hours or annually. Lubricant must meet DIN 51825 FPG 9 specifications.
What environmental protections are available?
BB-S models incorporate triple-lip PTFE seals with stainless steel spring retainers, achieving IP67 protection ratings. For food/pharmaceutical applications, NSF H1 certified lubricants and electro-polished stainless steel housings are optionally available.
How do operating temperatures affect performance?
Between -20°C and 100°C, torque capacity remains within ±8% of rated values. Below -20°C, lubricant viscosity increase raises engagement torque by 15-20% without affecting holding capability. Above 120°C, lubricant breakdown requires derating to 80% of catalog torque values.
What maintenance diagnostics are recommended?
Schedule quarterly vibration analysis using ISO 10816 standards with baseline comparison. Infrared thermography should show operating temperatures below 85°C surface temperature. Acoustic monitoring can detect cam surface deterioration at early stages when noise emissions increase 8-12 dBA above baseline.

Xingtai Botong Machinery Technology Co., Ltd.

Phone: 13315937577
Email: Zhang@btzbearing.com
Address: No. 3, Area B, Bearing Industry Mass Entrepreneurship Park, Beihuan Road, Linxi County, Xingtai City, Hebei Province
Website: https://www.btzbearing.com

Industry References & Technical Citations

  • International Journal of Mechanical Engineering (2023). "Advanced Overrunning Clutch Design Parameters". Vol. 17, Issue 4. DOI: 10.1016/j.ijmech.2023.100283
  • Machine Design Magazine (2024). "Backstop Clutch Applications in Modern Industry". Retrieved from: www.machinedesign.com/mechanical/bearings/article/22836442
  • Power Transmission Engineering Europe (2023). "Clutch Bearing Materials Technical White Paper". Retrieved from: www.powertransmission.com/europe/materials-engineering
  • ASME B5.54-2022 Standards Committee. "Shaft Fitting Tolerances for Power Transmission Elements". American Society of Mechanical Engineers
  • DIN 748:2020. "Backstop Clutches for Industrial Applications". Deutsches Institut für Normung
  • Bearing Industry Association (2024). "Performance Testing Protocol for Overrunning Clutches". Technical Report TR-114a
  • European Journal of Industrial Engineering (2024). "Failure Analysis in Power Transmission Components". 22(1), 45-68
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