0102030405
WENK Pneumatic FJ Series-Floating Joint
Dimension

| Bore | MA | MB | MC | MD | ME | MF | MG | MH | MI | MJ | MK |
| 36 | 13 | 5 | 13 | 16 | 10 | 4 | 6 | M4×0.7 | M4×0.7 | 14° | |
| 36 | 13 | 5 | 13 | 16 | 10 | 4 | 6 | M5×0.8 | M5×0.8 | 14° | |
| 36 | 13 | 5 | 13 | 16 | 10 | 4 | 6 | M6×1 | M6×1 | 14° | |
| 20 | 51 | 20 | 6 | 17 | 24 | 11.5 | 6 | 8 | M8×1.25 | M8×1.25 | 13° |
| 25 | 58 | 22 | 7 | 21 | 26 | 11.5 | 7 | 10 | M10×1.25 | M10×1.25 | 12° |
| 32 | 58 | 22 | 7 | 21 | 27 | 11.5 | 7 | 10 | M10×1.25 | M10×1.25 | 12° |
| 40 | 65 | 22 | 8 | 24 | 32 | 11.5 | 8 | 12 | M12×1.25 | M12×1.25 | 12° |
| 72 | 23 | 14 | 28 | 35 | 17 | 8 | 14 | M14×1.5 | M14×1.5 | 13° | |
| 50 | 90 | 27 | 17 | 36 | 44.5 | 20 | 10 | 17 | M16×1.5 | M16×1.5 | 7° |
| 63 | 90 | 27 | 17 | 36 | 44.5 | 20 | 10 | 17 | M16×1.5 | M16×1.5 | 7° |
| 91 | 26 | 17 | 36 | 45 | 24 | 10 | 17 | M18×1.5 | M18×1.5 | 7° | |
| 80 | 102 | 29 | 13 | 46 | 53 | 24 | 13 | 22 | M20×1.5 | M20×1.5 | 10° |
| 100 | 102 | 29 | 13 | 46 | 53 | 24 | 13 | 22 | M22×1.5 | M22×1.5 | 10° |
| 125 | 37 | 21 | 48 | 60 | 36 | 11.5 | 27 | M26×1.5 | M26×1.5 | 9° | |
| 125 | 125 | 37 | 21 | 48 | 60 | 36 | 115 | 27 | M27×20 | M27×2.0 | 9° |
User Guide: FJ10 Series Floating Joint

Product Overview
The FJ10 Series Floating Joint by WENK Pneumatic is a precision-engineered connector designed to compensate for misalignment between cylinders and driven components in automated systems. This innovative joint features a unique floating mechanism that absorbs axial, radial, and angular deviations, ensuring smooth operation and extended component life.

Product Specifications
- Model: FJ10 Series Floating Joint
- Thread Sizes: M4×0.7, M5×0.8, M6×1, M8×1.25, M10×1.25, M12×1.25, M14×1.5, M16×1.5, M18×1.5, M20×1.5, M22×1.5
- Materials:
- Body: High-strength alloy steel (trivalent chromate treatment)
- Internal Parts: Alloy steel
- Working Pressure:
- Pneumatic Applications: ≤1MPa
- Hydraulic Applications: ≤3.5MPa
- Operating Temperature Range: -10°C~60°C
- Allowable Angular Misalignment: ±5°
- Allowable Eccentricity: 0.5~1mm (depending on model)
- Maximum Tensile/Compressive Force: 19N~18,000N (depending on model)
- Protection Rating: IP65
- Standard Compliance: ISO Standard
- Body: High-strength alloy steel (trivalent chromate treatment)
- Internal Parts: Alloy steel
- Pneumatic Applications: ≤1MPa
- Hydraulic Applications: ≤3.5MPa

Installation Steps
-
Preparation
- Verify that the floating joint model matches the cylinder rod specifications
- Inspect the joint for damage or contamination
- Prepare necessary tools: wrench, thread locker (recommended)
- Clean the cylinder rod threads and mounting surfaces
-
Mounting the Joint
- Screw the floating joint onto the cylinder rod end
- Do not fully tighten the threads to the bottom; leave 1-2 turns for floating space
- For M10 and smaller sizes, thread locker is recommended for enhanced fixation
- Tighten evenly to the recommended torque value (refer to the table below)
-
Connecting the Load
- Attach the load to the other end of the floating joint
- Secure with appropriate pins or bolts
- Ensure flexible movement of the load after connection
-
Installation Check
- Verify that the joint is securely installed without looseness
- Confirm the joint can float and oscillate freely
- Test cylinder movement to ensure no abnormal resistance or noise
Preparation
- Verify that the floating joint model matches the cylinder rod specifications
- Inspect the joint for damage or contamination
- Prepare necessary tools: wrench, thread locker (recommended)
- Clean the cylinder rod threads and mounting surfaces
Mounting the Joint
- Screw the floating joint onto the cylinder rod end
- Do not fully tighten the threads to the bottom; leave 1-2 turns for floating space
- For M10 and smaller sizes, thread locker is recommended for enhanced fixation
- Tighten evenly to the recommended torque value (refer to the table below)
Connecting the Load
- Attach the load to the other end of the floating joint
- Secure with appropriate pins or bolts
- Ensure flexible movement of the load after connection
Installation Check
- Verify that the joint is securely installed without looseness
- Confirm the joint can float and oscillate freely
- Test cylinder movement to ensure no abnormal resistance or noise

Operation Guidelines
-
Before Initial Use
- Operate the cylinder 2-3 times under no-load conditions
- Check for smooth joint movement
- Confirm no abnormal noise or resistance
-
Normal Operation
- Ensure working pressure does not exceed the rated value
- Avoid exceeding the recommended angular misalignment and eccentricity ranges
- Regularly inspect the joint condition
- Keep the joint clean and free from contamination
-
Load Considerations
- Ensure the load does not exceed the joint's maximum tensile/compressive force
- Avoid applying excessive radial loads
- Impact loads should not exceed 1.5 times the rated load
Before Initial Use
- Operate the cylinder 2-3 times under no-load conditions
- Check for smooth joint movement
- Confirm no abnormal noise or resistance
Normal Operation
- Ensure working pressure does not exceed the rated value
- Avoid exceeding the recommended angular misalignment and eccentricity ranges
- Regularly inspect the joint condition
- Keep the joint clean and free from contamination
Load Considerations
- Ensure the load does not exceed the joint's maximum tensile/compressive force
- Avoid applying excessive radial loads
- Impact loads should not exceed 1.5 times the rated load

Maintenance
-
Daily Inspection
- Check for joint looseness
- Confirm smooth floating movement
- Inspect for abnormal wear or damage
-
Regular Maintenance
- Every 3 months:
- Clean the joint surface
- Check thread connection status
- Retighten or apply thread locker if necessary
- Every 6 months:
- Comprehensive inspection of joint wear
- Test floating flexibility
- Replace severely worn joints
-
Lubrication
- Additional lubrication is generally not required
- In harsh environments, add a small amount of grease every 3 months
- Use lithium-based grease or special pneumatic component lubricant
-
Storage
- Store unused joints in a dry, clean environment
- Avoid direct sunlight and high-temperature environments
- Storage temperature range: -10°C~40°C
Daily Inspection
- Check for joint looseness
- Confirm smooth floating movement
- Inspect for abnormal wear or damage
Regular Maintenance
- Every 3 months:
- Clean the joint surface
- Check thread connection status
- Retighten or apply thread locker if necessary
- Every 6 months:
- Comprehensive inspection of joint wear
- Test floating flexibility
- Replace severely worn joints
Lubrication
- Additional lubrication is generally not required
- In harsh environments, add a small amount of grease every 3 months
- Use lithium-based grease or special pneumatic component lubricant
Storage
- Store unused joints in a dry, clean environment
- Avoid direct sunlight and high-temperature environments
- Storage temperature range: -10°C~40°C

Safety Precautions
- Do not fully tighten the threads to the bottom during installation; leave 1-2 turns for floating space
- Avoid installing or removing the joint while it is under load
- Do not use the joint for purposes other than rotational movement
- Avoid use in environments with corrosive gases or liquids unless the joint has special protective treatment
- Regularly inspect the joint condition and promptly replace worn or damaged components
- Ensure the use of matching specification joints; do not mix different models or brands
- Reduce the rated load when using in high-temperature environments
- Always cut off the air or hydraulic supply during installation and maintenance

Our Commitments & Core Advantages
1. We are a factory specializing in the production of pneumatic components, with mature manufacturing experience and technology.
2. We manufacture and supply a wide range of series and specifications of air cylinders and pneumatic components, providing you with flexible options.
3. We can undertake the customization business of various pneumatic components according to the specific needs of customers.
We adhere to the service concept of efficiency and thoughtfulness, making you feel comfortable throughout the cooperation process, just as smooth as cooperating with a close friend.











