INA roller clutches revolutionize motion control by enabling instant torque transmission in one direction while allowing zero-resistance overrunning in the opposite direction. Utilizing precision-ground ramps, spring-loaded rollers, and optimized wedge geometry, these clutches deliver fail-safe engagement with <0.1° backlash—critical for applications requiring bidirectional control like helicopter rotors, conveyor indexing, and automotive starters.

Key Performance Advantages

Zero Backlash Engagement: Instant torque transfer in <2 ms

Overrunning Efficiency: 99% lower drag torque vs. sprag clutches

Space Optimization: 50% smaller than equivalent sprag clutches

Life Expectancy: 500,000+ cycles at full load

Industry-Specific Applications

◼ Automotive Transmissions

Challenge: Starter motor gear disengagement
Solution: FZ 35-K with <1 ms response time

Endurance: 500,000 engine starts

Drag Torque: 0.2 Nm at 8,000 RPM

◼ Wind Energy

Application: Pitch system backup drives
System: RZ 180-B bidirectional lock

Torque: 12,000 Nm holding capacity

Fail-Safe: Engages during power loss

◼ Packaging Machinery

Requirement: Zero-backlash indexing
Response: FZX 50-S with INA ClutchSense™

Position Accuracy: ±0.05°

Speed: 2,500 index cycles/hour

Installation & Maintenance

Mounting Protocol

Shaft Preparation:

Hardness: ≥55 HRC | Tolerance: k5 (ISO 286)

Thermal Assembly:

Heat outer ring to 120°C (INA Therm 2000)

Clearance Check:

Radial play: 0.01–0.03 mm (laser measurement)

Maintenance Guidelines

Relubrication Interval: 10,000 hours (grease: Arcanol L74)

Wear Limits:

Roller diameter reduction >0.1 mm

Ramp surface roughness >Ra 0.4 μm

Why INA Roller Clutches?

✅ Zero Backlash – Precision-ground ramps for instant engagement

✅ Intelligent Control – ClutchSense™ enables predictive maintenance

✅ Extreme Environments – –50°C to +200°C variants available

✅ Space Efficiency – 30–50% size reduction vs. competitors

Technical Support & Services

◼ Engineering Resources

INA ClutchAdvisor® Software:

Dynamic torque simulations

Life calculation per ISO 281 extended

Failure Analysis:

SEM/EDS wear pattern diagnostics

◼ Sustainability Commitment

Material Circularity:

95% steel recovery via Schaeffler ReCon

25% recycled Cronidur® content

CO₂ Reduction:

Low-drag design saves 8.5 tons CO₂/year per 100 units

Conclusion: Redefining Overrunning Precision

INA roller clutches transform motion systems through:

100% reliable starter engagement in electric vehicles

Zero-energy-positioning in solar trackers

Millisecond-precision indexing in high-speed packaging

Specify INA Roller Clutches Today—Where German Engineering Meets Failsafe Overrunning Control.