85+ years
R&D experience / case data
Integrated solutions
Complete production capabilities, versatile materials and customizable shapes for diverse applications.
Friction material reference · Carlisle case
Carlisle was founded in 1925. The case covers 85+ years of friction material R&D and operations in Asia, the Americas and Europe. Its Suzhou plant has over 280 employees and 10 R&D engineers, with ISO/TS 16949 certification, material testing and prototyping capabilities for paper, copper and mating steel plates.
280+
Employees / case data
10
Engineers / case data
Wet friction plates
Why replace copper friction plates with paper friction plates? This Carlisle case highlights the following benefits.
Higher friction coefficient
Lower cost
Lighter weight
Better energy absorption
Improved shifting and braking
More paper material grades
A higher friction coefficient can increase transmitted torque or allow reductions in clamping pressure, disc diameter or disc count, simplifying the system and reducing cost. In this material comparison, paper materials can absorb up to twice the energy of copper-based materials.
Material performance comparison
Carlisle reference data: energy absorption and friction coefficient.
S-40 CopperS-154 CopperS-156 CopperN-266 PaperN-360 PaperN-401 PaperN-670 Carbon paperTC-120 Carbon cloth
S-40 CopperS-154 CopperS-156 CopperN-266 PaperN-360 PaperN-401 PaperN-452 Carbon paperN-670 Carbon paperTC-121 Carbon cloth
Carlisle paper friction materials have been used by mining, construction vehicle and tractor manufacturers in the United States, Europe, Japan and Korea, in transmissions, brakes, PTO units and differentials.
Wet and dry friction systems
| Property | Wet friction materials | Dry friction materials |
|---|---|---|
| Temperature limit | Limited by oil degradation | Up to material melting point |
| Static pressure | Up to 6.9 MPa | Up to 27.5 MPa |
| Friction coefficient | Approx. 0.1 | Approx. 0.4 |
| Heat dissipation | Depends on cooler and oil flow | Depends on cooler |
Selection and operation guidance
1. Define the process before selecting equipment: material, thickness, sheet size and monthly output determine power, table layout and capacity.
2. Request trials with your own material; paper specifications alone cannot establish cutting or pickling results.
3. Prioritize batch consistency, including gas control, automatic nozzle changing, synchronized drives and concentration/temperature interlocks.
4. Plan acid mist collection, acid regeneration, wastewater treatment, environmental review and access/emergency-stop management alongside the line.
5. Obtain complete technical documents, process settings, wear-parts lists, maintenance intervals and acceptance standards.