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Heavy-Duty Wet Clutch & Braking Solutions

High-Shear & Thermal Resistant
Friction Discs & Mating Plates

Engineered for heavy equipment, power-shift transmissions, and industrial wet braking systems (compatible with Kessler, Kalmar, Komatsu, and more). Optimized dynamic-to-static friction ratios to prevent chatter and delay thermal overload.

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Wet Clutch Friction Disc Pack

Multi-disc wet clutch assembly: Internal spline friction discs interleaved with external spline steel mating plates.

Core Technology & Metallurgy

From tribology to fluid dynamics, ensuring maximum torque transmission and thermal stability under extreme load.

01

Bonding & Shear Resistance

Sintered bronze or carbon-paper composite facings bonded to heavy steel cores. Internal splines feature nitrided roots or fine-blanking to withstand cyclic high-torque fatigue.

Internal Spline Friction Disc
02

Oil Groove Dynamics

Precision waffle, grid, or sunburst grooves. Rapidly breaks oil film during engagement for quick response, while channeling ATF away during disengagement to minimize drag torque.

Waffle Groove Friction Disc
03

Steel Plate Flatness & Finish

Manufactured from 65Mn / 42CrMo heat-treated spring steel. Surface roughness maintained strictly at Rₐ 0.4–0.8 μm to prevent hydroplaning and thermal buckling.

External Teeth Steel Mating Plate

Featured Products & Part Cross-References

Direct replacements for industrial gearboxes and axle assemblies

Grid Groove Friction Disc

Grid Groove Friction Disc

P/N: 507-275-1023
Kalmar Steel Mating Plate

Outer Spline Steel Plate

P/N: 507-275-773 (Kalmar Type)
Fluid Port Friction Disc

Fluid-Bypass Friction Disc

P/N: 417-33-11243
Custom Pattern Series

Custom Grooving Series

OEM / Blueprint Custom

Technical Specifications Matrix

Compare material characteristics across the clutch pack assembly

Property / Category Internal Spline Friction Disc Grid-Groove Friction Disc Steel Mating Plate
Primary Function Energy conversion, high torque transfer Rapid oil evacuation, smooth friction ramp Heat absorption, dissipation & torque coupling
Base Material Sintered bronze / Paper composite + Steel core High-porosity paper / Carbon composite 65Mn / 42CrMo quenched & tempered alloy steel
Dynamic CoF (μd) 0.12 - 0.15 0.11 - 0.14 N/A
Critical QC Point Internal spline fatigue resistance & bonding strength Micro-porosity and groove depth consistency Surface roughness (Rₐ 0.4–0.8 μm) & flatness

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