INDUSTRY COMPONENT

Clutch piston

Hydraulic actuator component in clutch systems that applies pressure to engage friction plates.

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Component Specifications

Definition
A precision-engineered cylindrical component within automotive and industrial clutch assemblies that converts hydraulic pressure into mechanical force to compress clutch plates, enabling torque transfer between rotating shafts. It operates within sealed hydraulic circuits and requires exact dimensional tolerances for proper sealing and pressure application.
Working Principle
The clutch piston operates on hydraulic pressure principles. When pressurized fluid enters the piston chamber, it forces the piston to move axially against return springs, compressing the clutch pack friction plates against reaction plates. This creates frictional engagement that transfers torque from the input to output shafts. Pressure release allows springs to retract the piston, disengaging the clutch.
Materials
Typically aluminum alloys (A356, 6061) for lightweight applications or steel alloys (4140, 8620) for high-pressure systems. Sealing surfaces often feature hard anodizing or chrome plating. Seals are made of nitrile rubber (NBR), fluorocarbon (FKM), or polyurethane for hydraulic compatibility.
Technical Parameters
  • Hardness 70-90 Shore A (seals), 80-100 HRB (metal)
  • Stroke Length 5-25 mm
  • Diameter Range 50-200 mm
  • Surface Finish Ra 0.4-0.8 μm
  • Temperature Range -40°C to 150°C
  • Operating Pressure 10-30 bar
Standards
ISO 3601, DIN 3771, SAE J514

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clutch piston.

clutch piston hydraulic actuator clutch pack component transmission parts torque converter automotive clutch industrial clutch systems Clutch piston in Motor Vehicle Manufacturing

Parent Products

This component is used in the following industrial products

Clutch Pack

A multi-plate friction assembly within an automatic transmission that engages and disengages power flow between rotating components.

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Engineering Analysis

Risks & Mitigation
  • Hydraulic fluid contamination
  • Seal extrusion under high pressure
  • Thermal expansion mismatch
  • Cavitation damage during rapid disengagement
FMEA Triads
Trigger: Seal hardening from elevated temperatures
Failure: Fluid leakage leading to insufficient clutch engagement pressure
Mitigation: Use high-temperature resistant seal materials (FKM) and implement cooling circuits
Trigger: Abrasive particles in hydraulic fluid
Failure: Scoring of piston sealing surfaces causing leakage paths
Mitigation: Install fine filtration (10μm) and regular fluid analysis

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter: ±0.02 mm, Concentricity: 0.05 mm TIR, Surface finish: Ra 0.4-0.8 μm
Test Method
ISO 3601 for seal compatibility, SAE J514 for hydraulic fittings, pressure testing per ISO 6605

Buyer Feedback

★★★★☆ 4.6 / 5.0 (8 reviews)

"Standard OEM quality for Motor Vehicle Manufacturing applications. The Clutch piston arrived with full certification."

"Great transparency on the Clutch piston components. Essential for our Motor Vehicle Manufacturing supply chain."

"The Clutch piston we sourced perfectly fits our Motor Vehicle Manufacturing production line requirements."

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Frequently Asked Questions

What causes clutch piston failure?

Common failures include seal degradation from heat/contamination, scoring of sealing surfaces, corrosion from moisture in hydraulic fluid, and fatigue cracking from pressure cycling.

How do you test clutch piston performance?

Testing involves pressure decay tests for seal integrity, stroke measurement under load, leakage rate verification, and endurance cycling under operational temperature ranges.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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