INDUSTRY COMPONENT

Cylinder Liner / Motor Housing

Cylinder liner or motor housing is a critical component that provides structural integrity and sealing for pneumatic pistons/diaphragms or electric motors.

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Component Specifications

Definition
A cylinder liner (in pneumatic applications) or motor housing (in electric applications) is a precision-engineered cylindrical component that serves as the primary structural enclosure. In pneumatic systems, it guides piston movement and contains compressed air; in electric motors, it houses stator windings, rotor assembly, and provides mounting interfaces while dissipating heat. It ensures proper alignment, minimizes friction, and maintains pressure/thermal integrity.
Working Principle
In pneumatic systems: The liner provides a smooth, wear-resistant surface for piston rings/seals to slide against, converting air pressure into linear motion while preventing leakage. In electric motors: The housing supports electromagnetic components, provides mechanical protection, facilitates cooling through fins or jackets, and aligns bearings for rotational motion.
Materials
Common materials include cast iron (gray or ductile), aluminum alloys (for lightweight applications), steel alloys (for high-pressure/temperature), and engineered polymers (for corrosion resistance). Specific grades: GG25 cast iron, AlSi10Mg aluminum, AISI 1045 steel.
Technical Parameters
  • Hardness 180-300 HB
  • Inner Diameter 20-500 mm
  • Surface Finish Ra 0.4-1.6 μm
  • Wall Thickness 3-25 mm
  • Pressure Rating Up to 30 bar (pneumatic)
  • Temperature Range -40°C to 150°C
  • Concentricity Tolerance 0.02-0.1 mm
Standards
ISO 1219, ISO 4401, DIN 24340, IEC 60034

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cylinder Liner / Motor Housing.

cylinder liner motor housing pneumatic cylinder electric motor casing industrial components ISO standards material specifications Cylinder Liner / Motor Housing Cylinder Liner / Motor Housing in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Piston/Diaphragm (Pneumatic) or Motor (Electric)

The core driving mechanism within an actuator that converts energy (pneumatic pressure or electrical power) into linear or rotary mechanical motion.

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Engineering Analysis

Risks & Mitigation
  • Wear and scoring leading to leakage
  • Thermal expansion causing misalignment
  • Corrosion in humid/chemical environments
  • Fatigue cracking under cyclic loads
FMEA Triads
Trigger: Inadequate lubrication
Failure: Increased friction and premature wear
Mitigation: Implement automatic lubrication systems and regular maintenance schedules
Trigger: Material fatigue from pressure cycles
Failure: Crack formation and catastrophic failure
Mitigation: Use fatigue-resistant materials and design with safety factors
Trigger: Improper installation alignment
Failure: Eccentric wear and reduced efficiency
Mitigation: Use precision alignment tools and follow installation protocols

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 2768-mK for general dimensions, ISO 286 for fits
Test Method
Pressure testing per ISO 4414, dimensional inspection with CMM, hardness testing per ASTM E10

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 difference between a cylinder liner and a motor housing?

Cylinder liners are used in pneumatic/hydraulic systems to guide pistons, while motor housings enclose electric motor components. Both provide structural support but differ in design for pressure containment vs. electromagnetic and thermal management.

How do I select the right material for a cylinder liner?

Consider operating pressure, temperature, wear resistance, and corrosion environment. Cast iron offers good wear resistance, aluminum reduces weight, and steel handles high pressures.

What maintenance is required for cylinder liners?

Regular inspection for wear/scoring, lubrication of inner surfaces, and checking seal integrity. Replace if wear exceeds tolerance or surface damage occurs.

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.

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