Maximizing Efficiency with Logan R, S, and P Series Clutches

For over 50 years, Logan Clutch has been at the forefront of delivering high-performance hydraulic and pneumatic clutches for a wide range of industries, including marine, mobile, industrial, and hybrid drive applications. Our R, S, and P Series clutches are designed for durability, precision, and maximum torque transfer—ideal for demanding applications that require seamless performance.

What Makes Logan R, S, and P Series Clutches Stand Out?

When it comes to reliable torque transfer in a compact design, our clutches deliver unmatched efficiency. With sizes ranging from 2.5 inches (64 mm) to 9.75 inches (248 mm) in diameter, they fit seamlessly into various high-torque applications while maintaining a small footprint. Similar to our larger CH and HPC Series clutches (which extend up to 29 inches (73.66 cm) in diameter), these units offer:

✔ Fast engagement and quick release
✔ Hydraulic or pneumatic actuation
✔ Self-adjusting disc pack for reduced maintenance
✔ Wet or dry operation compatibility
✔ Custom modifications for specific application needs

How Do Logan Clutches Work?

The R, S, and P Series clutches function through a hydraulic or pneumatic actuation system. When pressurized, the piston clamps and locks the friction discs, separator discs, and release springs into a multiple-disc pack, transferring torque through the clutch to a drive cup, which is mounted to a sprocket, pulley, or drive shaft.

When the pressure is released, the separator discs disengage, maintaining a precise clearance between components—ensuring longevity and smooth operation.

Designed for Brake Applications

• S and P Series as Power-Applied Brakes: The hub is keyed to the shaft to stop rotation, while the drive cup remains stationary.
• R Series Flexibility: Either the hub or the drive cup can be used as the stationary member.

Self-Adjusting for Maximum Efficiency

Unlike traditional clutches that require constant manual adjustments, Logan Clutches are self-adjusting! The piston travel compensates for disc wear, reducing maintenance and ensuring consistent performance throughout the clutch’s lifespan.

Wet vs. Dry Operation

• R and S Series Clutches are ideal for wet applications and can be used within gearboxes or oil sumps, utilizing splash or forced lubrication.
• P Series Clutches are designed for dry operation, with sealed, greased bearings that require minimal maintenance.

Key Technical Specifications

• Torque Range: From 91 lb-ft (123 Nm) to 3127 lb-ft (4240 Nm)
• Max Pressure: 150 psi (10.3 bar) for wet applications, 100 psi (6.9 bar) for dry applications
• Speed Range: 1 to 2200 RPM, with optional stronger release springs for higher-speed disengagement
• Custom Configurations: Available for higher torque and actuation pressures

Where Are Logan Clutches Used?

Our R, S, and P Series clutches power thousands of machines worldwide in industries that demand reliable and efficient torque transfer.

Popular Applications:

Machine Tools

• Ideal for multiple-spindle screw machines, gearboxes, and spindle drives
• High torque capacity in a compact design
• Reduced wear and improved power transfer for long-term reliability

Marine and Industrial Gearboxes

• Used in marine propulsion and auxiliary systems
• Designed for high-torque transmission in tight spaces
• Low maintenance and high reliability for harsh environments

Hybrid Drive Systems

• Engages/disengages power sources in hybrid vehicles
• Enables smooth transitions between internal combustion engines and electric motors
• Helps reduce fuel consumption and emissions

Why Choose Logan Clutches for Hybrid Applications?

✅ Energy Efficiency: Minimizes power losses and optimizes fuel economy
✅ Durability: Built to withstand high torque and demanding conditions
✅ Reduced Emissions: Supports electric operation, cutting emissions and noise
✅ Customizable Solutions: Tailored to specific hybrid system requirements

Let’s Find the Right Clutch for Your Needs

Whether you're upgrading an existing system or designing something new, Logan Clutch has the engineering expertise and industry-leading technology to optimize your equipment’s performance.

📩 Need help selecting the right clutch? Contact us at sales@loganclutch.com, and our team will assist you in finding the perfect solution for your application.