WENK Pneumatic SXJ Clamp Cylinder
Product Detail
Acting Mode |
Single-Acting/Double-Acting |
Working Media |
Cleaned Air |
Working Pressure |
0.1~0.7Mpa |
SXJ Pneumatic Clamp Cylinder User Guide

1. Product Introduction
1.1 Product Overview
The SXJ Pneumatic Clamp Cylinder is a precision-engineered mechanical clamping solution designed for industrial automation applications. Constructed with robust stainless steel and aluminum alloy components, this cylinder provides reliable and consistent clamping force for workpiece holding during machining, welding, and assembly operations.
1.2 Working Principle
The SXJ clamp cylinder utilizes compressed air to drive an internal piston, which actuates a mechanical linkage mechanism to open and close the clamping jaws. Its unique toggle lever design efficiently converts pneumatic energy into mechanical clamping force, providing powerful and stable workpiece fixation.
1.3 Key Features
- High-strength stainless steel clamping jaws for excellent wear resistance and long service life
- Aluminum alloy cylinder body for lightweight construction and good heat dissipation
- Advanced toggle mechanism for high clamping force with minimal air consumption
- Adjustable clamping force design to accommodate different workpiece materials and shapes
- Fast response time to improve production efficiency
- Compact structural design to save installation space
1.4 Application Range
- CNC machine workpiece fixation
- Automated production line assembly stations
- Welding fixture systems
- Robotic end effectors
- Precision component machining positioning
- Automotive manufacturing tooling fixtures

2. Installation Instructions
2.1 Pre-Installation Preparation
- Confirm that the air supply pressure meets product requirements (4-6 bar)
- Prepare necessary installation tools: hex wrenches, screwdrivers, air fittings, etc.
- Check that the mounting surface is flat and has sufficient strength to support cylinder operation
- Ensure adequate space is available for full jaw opening and closing
2.2 Installation Steps
-
Secure Cylinder Base
- Use appropriate bolts to fix the cylinder base to the workbench
- Ensure mounting bolts are tightened to prevent vibration during operation
- Spring washers are recommended to prevent bolt loosening
-
Connect Air Supply
- Use specified air hoses to connect to the cylinder's air inlets
- Inlet ports are typically marked "P", exhaust ports marked "A" and "B"
- Ensure air connections are secure to prevent leaks
- Install pressure regulators and filters at the air supply inlet to ensure clean, dry air
-
Install Clamping Jaws
- Select appropriate jaws based on workpiece shape and size
- Use hex screws to secure jaws to the cylinder output shaft
- Ensure jaws are correctly installed and can open and close smoothly
-
Install Limit Devices (Optional)
- Install limit switches or proximity sensors as required
- Adjust sensor positions to accurately detect jaw open/close status
- Connect sensor signal wires to the control system
Secure Cylinder Base
- Use appropriate bolts to fix the cylinder base to the workbench
- Ensure mounting bolts are tightened to prevent vibration during operation
- Spring washers are recommended to prevent bolt loosening
Connect Air Supply
- Use specified air hoses to connect to the cylinder's air inlets
- Inlet ports are typically marked "P", exhaust ports marked "A" and "B"
- Ensure air connections are secure to prevent leaks
- Install pressure regulators and filters at the air supply inlet to ensure clean, dry air
Install Clamping Jaws
- Select appropriate jaws based on workpiece shape and size
- Use hex screws to secure jaws to the cylinder output shaft
- Ensure jaws are correctly installed and can open and close smoothly
Install Limit Devices (Optional)
- Install limit switches or proximity sensors as required
- Adjust sensor positions to accurately detect jaw open/close status
- Connect sensor signal wires to the control system
2.3 Installation Precautions
- Install the cylinder away from high temperature, humidity, and corrosive environments
- Avoid direct sunlight and rain exposure
- Ensure the cylinder piston rod is parallel to the load movement direction during installation
- Reserve sufficient maintenance and inspection space
- Ensure proper hose routing to avoid compression or wear from other moving parts

3. Operation Instructions
3.1 Pre-Operation Checks
- Check that air supply pressure is within the specified range (4-6 bar)
- Confirm all air connections are secure with no leaks
- Verify that jaws can open and close freely without binding
- Ensure workpieces are correctly positioned and will not interfere with jaw movement
- Test limit sensors for proper operation (if installed)
3.2 Basic Operation Steps
-
Start Air Supply
- Open the air supply valve and adjust the pressure regulator to the required pressure
- Observe the cylinder for any abnormal sounds or leaks
-
Manual Testing
- Use manual control buttons to test jaw opening and closing actions
- Confirm smooth jaw movement without abnormal vibration or noise
- Check if clamping force meets work requirements
-
Automatic Operation
- Switch the control system to automatic mode
- Perform workpiece clamping operations according to preset programs
- Monitor the entire work cycle to ensure everything functions normally
-
Stopping Operation
- After completing work, first shut down the control system
- Close the air supply valve and release system pressure
- Clean the jaw surfaces and remove workpiece residues
Start Air Supply
- Open the air supply valve and adjust the pressure regulator to the required pressure
- Observe the cylinder for any abnormal sounds or leaks
Manual Testing
- Use manual control buttons to test jaw opening and closing actions
- Confirm smooth jaw movement without abnormal vibration or noise
- Check if clamping force meets work requirements
Automatic Operation
- Switch the control system to automatic mode
- Perform workpiece clamping operations according to preset programs
- Monitor the entire work cycle to ensure everything functions normally
Stopping Operation
- After completing work, first shut down the control system
- Close the air supply valve and release system pressure
- Clean the jaw surfaces and remove workpiece residues
3.3 Clamping Force Adjustment
- Control clamping force by adjusting air supply pressure
- Recommended pressure ranges for different workpiece materials:
- Metal workpieces: 5-6 bar
- Plastic workpieces: 3-4 bar
- Fragile workpieces: 2-3 bar
- Test after adjustment to ensure workpieces are securely clamped without damage
- Metal workpieces: 5-6 bar
- Plastic workpieces: 3-4 bar
- Fragile workpieces: 2-3 bar
3.4 Safe Operation Guidelines
- Never place hands or body parts into the jaw working area during operation
- Regularly inspect jaw wear and replace severely worn components promptly
- Immediately stop operation if abnormal conditions are detected, troubleshoot before continuing
- Never overload the cylinder beyond its rated capacity
- Always shut off air supply and release pressure during maintenance

4. Maintenance
4.1 Daily Maintenance
-
Cleaning
- Clean jaw surfaces after each workday
- Use compressed air to blow off external cylinder surfaces to remove dust and debris
- Regularly clean the air inlet filter to ensure clean air supply
-
Inspection
- Check air connections for security and signs of aging
- Inspect jaws for wear or deformation
- Check bolts for looseness and tighten as needed
-
Lubrication
- Lubricate mechanical moving parts weekly
- Use recommended lubricants and avoid excessive application that may attract dust
- Keep lubricated parts clean
Cleaning
- Clean jaw surfaces after each workday
- Use compressed air to blow off external cylinder surfaces to remove dust and debris
- Regularly clean the air inlet filter to ensure clean air supply
Inspection
- Check air connections for security and signs of aging
- Inspect jaws for wear or deformation
- Check bolts for looseness and tighten as needed
Lubrication
- Lubricate mechanical moving parts weekly
- Use recommended lubricants and avoid excessive application that may attract dust
- Keep lubricated parts clean
4.2 Periodic Maintenance
-
Monthly Maintenance
- Check cylinder seals for leaks
- Test clamping force to ensure it meets requirements
- Verify sensor sensitivity and accuracy
-
Quarterly Maintenance
- Replace air inlet filter elements
- Apply comprehensive lubrication to all moving parts
- Inspect toggle mechanism for wear
- Test cylinder response time and movement smoothness
-
Annual Maintenance
- Disassemble and inspect internal components for wear
- Replace severely worn seals and bearings
- Readjust jaw parallelism and perpendicularity
- Conduct comprehensive testing and calibration of the entire system
Monthly Maintenance
- Check cylinder seals for leaks
- Test clamping force to ensure it meets requirements
- Verify sensor sensitivity and accuracy
Quarterly Maintenance
- Replace air inlet filter elements
- Apply comprehensive lubrication to all moving parts
- Inspect toggle mechanism for wear
- Test cylinder response time and movement smoothness
Annual Maintenance
- Disassemble and inspect internal components for wear
- Replace severely worn seals and bearings
- Readjust jaw parallelism and perpendicularity
- Conduct comprehensive testing and calibration of the entire system
4.3 Maintenance Records
- Establish equipment maintenance logbooks
- Record maintenance dates, contents, and any issues found
- Develop preventive maintenance plans based on maintenance records
- Save replacement part models and batch information
4.4 Storage Precautions
- When not in use for extended periods, clean and apply anti-rust oil
- Store in a dry, ventilated environment away from direct sunlight
- Regularly check storage conditions to prevent rust and aging
- Conduct comprehensive inspection and testing before reactivation

5. Troubleshooting
5.1 Common Faults and Solutions
-
Jaws not moving: Check air pressure, air connections, solenoid valve status and mechanical components
-
Insufficient clamping force: Adjust air pressure, replace worn seals, inspect toggle mechanism
-
Unsmooth jaw movement: Enhance lubrication, replace worn parts, readjust installation position
-
Air leakage: Replace seals, tighten air fittings, check cylinder integrity
-
Abnormal noise: Increase lubrication, tighten loose components, replace worn bearings
-
Sensor not working: Check power connections, adjust sensor position, replace damaged sensors
5.2 Emergency Handling Measures
-
Sudden Air Loss
- Immediately shut down the control system
- Manually release jaws and remove workpiece
- Inspect air supply system and troubleshoot
-
Jaw Jamming
- Immediately cut off air supply
- Attempt manual jaw release
- Disassemble jaws for repair if release is not possible
-
Abnormal Vibration or Noise
- Immediately stop operation
- Inspect moving parts for foreign objects or damage
- Resume use only after troubleshooting
Sudden Air Loss
- Immediately shut down the control system
- Manually release jaws and remove workpiece
- Inspect air supply system and troubleshoot
Jaw Jamming
- Immediately cut off air supply
- Attempt manual jaw release
- Disassemble jaws for repair if release is not possible
Abnormal Vibration or Noise
- Immediately stop operation
- Inspect moving parts for foreign objects or damage
- Resume use only after troubleshooting
5.3 Contacting Maintenance
- Contact professional maintenance personnel for faults that cannot be resolved independently
- Provide product model, serial number, and fault description
- Use original parts for replacements to ensure product performance
- Conduct comprehensive testing after maintenance to ensure normal operation
5.4 Fault Prevention
- Strictly follow operating and maintenance manuals
- Regularly inspect and maintain equipment
- Use clean, dry compressed air
- Avoid overloading and improper operation
- Keep the working environment clean to prevent dust and debris from entering the cylinder












