Electric cylinder selection must comprehensively consider six core parameters: load, stroke, speed, precision, mounting method, and operating environment. Improper selection may lead to insufficient thrust, inadequate accuracy, or reduced equipment lifespan. Below is a systematic selection guide.
1. Load: The Starting Point of Selection
The load directly determines the thrust rating and structural specifications of the electric cylinder.
Types of Load
Static load: e.g., pressing, clamping
Dynamic load: e.g., handling, reciprocating motion
Impact load: e.g., stamping, rapid start/stop
Calculation (Simplified)
Actual thrust = Load weight + Friction resistance + Acceleration demand
Recommendation: Selected thrust ≥ Actual calculated thrust × 1.2–1.5 safety factor
Selection Guidance
Light load (≤10 kN): Compact or mini electric cylinders
Medium load (10–100 kN): Standard servo electric cylinders
Heavy load (≥100 kN): High-thrust structures or custom solutions

2. Stroke: Determines Structural Dimensions
Stroke refers to the maximum travel distance of the cylinder, affecting overall size and screw stability.
Key Points
Longer stroke requires higher screw stability
For long strokes, critical speed and deflection must be considered
Selection Guidance
Short stroke (≤200 mm): Suitable for high-precision applications
Medium stroke (200–1000 mm): General automation scenarios
Long stroke (≥1000 mm): Recommend guided structure or custom design
Note: Total cylinder length ≈ Fixed length + Stroke — crucial in space-constrained equipment

3. Speed: Affects Production Efficiency
Speed determines cycle time and is key to production line efficiency.
Core Parameters
Maximum speed (mm/s)
Acceleration (mm/s²)
Selection Principles
High-speed applications: Use large-lead screws + high-speed servo motors
High-thrust applications: Speed is typically reduced (trade-off required)
Typical Application References
Handling equipment: 200–500 mm/s
Precision assembly: Low speed with high stability
Simulation platforms: Emphasize response speed and acceleration

4. Precision: Determined by Control and Structure
Precision is reflected in repeatability and positioning accuracy.
Influencing Factors
Screw type (Ball screw / Planetary roller screw)
Control mode (Open-loop / Semi-closed loop / Full closed loop)
Sensor configuration (Encoder / Linear scale)
Selection Guidance
General automation: ±0.02 mm is sufficient
Precision machining/inspection: Recommend closed-loop feedback system
Multi-axis platforms: Pay attention to coordinated multi-axis accuracy

5. Mounting Method: Affects System Integration
Mounting method influences mechanical design and load distribution.
Common Methods
Front flange mount: Compact structure, suitable for linear pushing
Rear clevis mount: Ideal for oscillating operations
Base mount: High stability, suitable for heavy-duty equipment
Selection Considerations
Presence of off-center or lateral loads
Need for additional guide rails
Space limitations
Recommendation: Add guiding mechanism if lateral load exists to prevent abnormal stress on the cylinder

6. Duty Cycle and Operating Conditions: Determine Lifespan and Reliability
Operating frequency and environmental conditions affect durability and performance.
Duty Cycle Types
Low frequency: e.g., adjustment mechanisms, intermittent operation
Medium frequency: e.g., standard automated lines
High frequency: e.g., continuous reciprocation, rhythm-based systems
Environmental Factors
Temperature: High or low temperature environments
Protection: Dust, moisture, corrosion resistance
Load condition: Presence of impact or eccentric load
Selection Guidance
High-frequency use: Prioritize long-life design; focus on heat dissipation and lubrication
Harsh environments: Recommend high IP rating (e.g., IP65 or higher)
Dust/moisture presence: Emphasize sealing and protection design
