Editorial Technical Reference

Actuator (Pneumatic Cylinder/Servo Motor)

This page explains how Actuator (Pneumatic Cylinder/Servo Motor) is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical device that converts energy into motion to drive tool gripper/arm movements.

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Product Specifications

Technical details and manufacturing context for Actuator (Pneumatic Cylinder/Servo Motor)

Definition
An actuator is the core motion-generating component within a tool gripper or robotic arm system. It provides the precise linear or rotational force required for gripping, positioning, lifting, or manipulating objects. Pneumatic cylinders use compressed air for linear motion, while servo motors provide controlled rotational motion, often with high precision and feedback. This directory entry covers both types, offering reference specifications for selection and verification. The actuator is typically mounted between the robotic arm and the end-effector, translating its output motion to the gripper or arm mechanism. For pneumatic cylinders, the bore size, stroke length, and operating pressure determine the force output and speed. For servo motors, positioning accuracy and repeatability are critical, often achieved through closed-loop feedback systems. Materials commonly used include aluminum alloy, stainless steel, and engineering plastics, with the body often made of 6061-T6 aluminum alloy. The operating temperature range is -10 to 60°C, and the IP rating is IP54 to IP65, depending on the environment. The weight varies from 1.5 to 12 kg based on bore and stroke. All listed parameters are reference ranges that must be confirmed with the manufacturer for the specific model and application. Standards such as ISO 6432, ISO 9283, IEC 60529, and IEC 60038 are provided as procurement references, not as proof of compliance. Always verify model-specific values and standards with the legal manufacturer or supplier before purchase or integration.
Working Principle
Pneumatic cylinders operate by introducing compressed air into a chamber to push a piston, creating linear force. The force output is proportional to the bore size and the applied pressure. Servo motors use electrical signals to control the position, velocity, and torque of a rotary shaft through closed-loop feedback systems, such as encoders or resolvers. Both types ultimately translate their output motion to the gripper or arm mechanism, enabling precise control of movement. The working principle is fundamental to selecting the appropriate actuator for a given application, considering factors like required force, speed, and accuracy.
Common Materials
Aluminum alloy, Stainless steel, Engineering plastics
Technical Parameters
ParameterTypical rangeNotes & selection driver
Bore Size32–125 mmDetermines force outputISO 6432
Stroke Length25–500 mmCustom strokes availableISO 6432
Operating Pressure0.1–1.0 MPaBelow 0.1 MPa insufficient force
Force Output500–7500 NAt 0.6 MPaISO 6432
Speed Range50–500 mm/sAdjustable via flow control
Positioning Accuracy±0.05 mmFor servo motor versionISO 9283
Repeatability±0.02 mmFor servo motor versionISO 9283
Operating Temperature-10–60 °CSeals degrade above 60°CISO 6432
IP RatingIP54–IP65Higher for dusty/wet environmentsIEC 60529
Voltage24 ±10% V DCFor servo motor versionIEC 60038
Material6061-T6Aluminum alloy bodyASTM B211
Weight1.5–12 kgDepends on bore and stroke

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Piston/Rod Part
    Transmits linear force in pneumatic cylinders
    Material: Chrome-plated steel
  • Cylinder Barrel
    Contains pressurized air and guides piston movement
    Material: Aluminum alloy
  • Servo Motor Rotor Part
    Rotating component that generates torque through electromagnetic fields
    Material: Laminated steel
  • Encoder/Resolver
    Provides position/speed feedback for precise servo control
    Material: Plastic/electronic components

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (pneumatic), 0-600 bar (hydraulic variants)
other spec: Flow rate: 10-1000 L/min (pneumatic), Speed: 0.1-2.0 m/s, Duty cycle: Up to 100% (servo), IP rating: IP65-IP69K
temperature: -20°C to 80°C (standard), -40°C to 120°C (special seals)
Media Compatibility
✓ Compressed air (filtered, lubricated) ✓ Hydraulic oil (ISO VG 32-68) ✓ Inert gases (nitrogen, argon)
Unsuitable: Saltwater/marine environments without special corrosion protection
Sizing Data Required
  • Required force/thrust (N)
  • Stroke length (mm)
  • Operating speed/cycle time (mm/s or cycles/min)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal degradation
Cause: Contaminants in compressed air (moisture, oil, particulates) causing swelling, hardening, or abrasion of seals, leading to air leaks and loss of pressure.
Rod scoring or bending
Cause: Misalignment during installation, side-loading forces, or lack of proper rod support, resulting in excessive friction, seal damage, or catastrophic rod failure.
Maintenance Indicators
  • Audible hissing or air leaks around cylinder seals or fittings, indicating seal failure or connection issues.
  • Erratic or jerky motion during operation, suggesting internal contamination, binding, or pressure irregularities.
Engineering Tips
  • Install and maintain high-quality air filtration (coalescing filters, dryers) to remove moisture, oil, and particulates from the compressed air supply.
  • Ensure proper cylinder alignment and use rod supports or guides to prevent side-loading, and regularly inspect mounting hardware for tightness.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 15552: Pneumatic fluid power - Standard cylinders ANSI/NFPA T3.6.7: Fluid power cylinders - Method for testing the fatigue of pneumatic cylinders DIN ISO 6432: Pneumatic fluid power - Single rod cylinders, 10 bar (1000 kPa) series - Mounting dimensions

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.02 mm
  • Rod straightness: 0.05 mm per 300 mm length
Quality Inspection
  • Pressure testing: Leakage and burst pressure verification
  • Dimensional inspection: Critical feature measurement with CMM

Manufacturers of Actuator (Pneumatic Cylinder/Servo Motor)

Manufacturer profiles associated with Actuator (Pneumatic Cylinder/Servo Motor).

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Frequently Asked Questions

What is the difference between a pneumatic cylinder and a servo motor actuator?

A pneumatic cylinder uses compressed air to produce linear motion, while a servo motor provides controlled rotational motion with high precision and feedback. The choice depends on the application's requirements for force, speed, and accuracy.

How do I select the correct bore size for a pneumatic cylinder?

Bore size determines the force output. For a given operating pressure, a larger bore provides more force. Refer to the force output range (500-7500 N at 0.6 MPa) and verify with the manufacturer for your specific pressure and load requirements.

What is the significance of the IP rating?

The IP rating indicates the degree of protection against dust and water. For this actuator, the range is IP54 to IP65. Higher ratings are suitable for dusty or wet environments. Confirm the required rating based on your operating environment.

Are the listed standards proof of compliance?

No. The standards listed (e.g., ISO 6432, ISO 9283) are procurement references for verification. They do not certify that a specific product or supplier is compliant. Always request documentation from the manufacturer to confirm compliance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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