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Master Cylinder Piston Component – Motor Vehicle Manufacturing

Component Specifications

Definition

A precision cylindrical component within a master cylinder that moves under applied force to displace hydraulic fluid, creating pressure for actuating downstream mechanisms like brakes or clutches. It operates within a sealed bore and interfaces with seals to maintain fluid integrity while transmitting force.

Working Principle

The piston translates linear mechanical input (e.g., from a pedal or lever) into hydraulic pressure by compressing fluid in the cylinder bore. This pressure is transmitted through hydraulic lines to actuate slave cylinders or other components, enabling force amplification and remote operation.

Materials

Typically aluminum alloy (e.g., 6061-T6) for lightweight applications, or hardened steel (e.g., AISI 4140) for high-stress environments. May include surface treatments like anodizing or chrome plating for corrosion and wear resistance.

Technical Parameters

Weight 50-150 g
Diameter 19-25 mm
Stroke Length 20-40 mm
Surface Finish Ra 0.4-0.8 μm
Operating Pressure Up to 20 MPa

Standards

ISO 4925, DIN 74254

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Master Cylinder Piston.

Parent Products

This component is used in the following industrial products

Actuation Mechanism (e.g., lever, pedal, hydraulic cylinder)

A mechanical or hydraulic component that converts driver input into force to engage the brake system.

View Product Details

Engineering Analysis

Risks & Mitigation

Seal failure leading to hydraulic fluid leakage
Corrosion or pitting causing binding
Fatigue cracking under cyclic loads
Contamination causing abrasion and wear

FMEA Triads

Trigger: Seal degradation due to heat or chemical exposure
Failure: Hydraulic fluid leakage and pressure loss
Mitigation: Use compatible seals, regular fluid changes, and temperature monitoring

Trigger: Corrosion from moisture ingress
Failure: Piston binding or seizure
Mitigation: Apply protective coatings, use desiccants in reservoirs, and ensure proper sealing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.01 mm on diameter, ±0.05 mm on length

Test Method

Pressure cycling test per ISO 4925, leak test with dyed fluid, dimensional verification with CMM

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a master cylinder piston?

To convert mechanical force into hydraulic pressure for actuating systems like brakes or clutches.

How does wear affect master cylinder piston performance?

Wear can cause fluid leakage, reduced pressure generation, and increased pedal travel, leading to system failure.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Master Cylinder Piston