Pneumatic cylinder
DNC Cylinder Repair Kits
DNC Cylinder Repair Kits
Specifications
- Material
- Aluminum
- Operation pressure
- 0.1-0.9Mpa
- Working Medium
- Air
- Working temperature range
- -5-60 degree
DNC Cylinder Repair Kits (ISO 15552)
The DNC Cylinder Repair Kit is a complete replacement parts set designed for ISO 15552 standard DNC pneumatic cylinders. It contains the essential internal components required for cylinder maintenance, repair, and rebuilding, helping restore original performance while reducing replacement costs.
Instead of replacing the entire cylinder, maintenance teams can simply replace worn internal parts, significantly reducing equipment downtime and extending cylinder service life.
The DNC repair kit is suitable for industrial automation, packaging machinery, textile equipment, food processing machines, woodworking equipment, material handling systems, and other pneumatic applications.
Key Features
- Complete Maintenance Solution Includes all major internal components required for cylinder rebuilding.
- ISO 15552 Standard Designed to fit standard DNC pneumatic cylinders.
- High-Quality Materials Premium aluminum alloy, hardened steel, PTFE bearings, and durable NBR/PU seals ensure long service life.
- Reduced Maintenance Cost Replace only worn components instead of purchasing a new cylinder.
- Easy Installation Components are manufactured with high dimensional accuracy for convenient assembly.
- OEM Available Customized kits and packaging are available for distributors and equipment manufacturers.

Kit Components
Each DNC Cylinder Kit includes the following components:
Part Name | Material |
Front Cover | Aluminum Alloy |
Back Cover | Aluminum Alloy |
Piston | Aluminum Alloy |
Piston Rod (Without) | S45C Hardened Carbon Steel |
Cylinder Barrel (Without) | Hard Anodized Aluminum |
Front Cover Seal | PU |
Cushion Seal | NBR |
Piston Rod O-Ring | NBR |
Cover O-Ring | NBR |
Piston Seal | NBR |
Wear Ring | PA66 |
Self-Lubricating Bearing | PTFE + Brass |
Magnet (Optional) | Rare Earth Magnet |
Cushion Needle | Brass |
Hexagon Screw | Carbon Steel |
Nut | Carbon Steel |
Profile Bolt | Carbon Steel |
Premium Material Advantages
Hard Anodized Aluminum Barrel
The cylinder barrel features a hard anodized surface with excellent wear resistance, corrosion protection, and a smooth internal finish for reliable piston movement.
Aluminum Alloy Covers
Both front and rear covers are manufactured from high-strength aluminum alloy, providing excellent strength while keeping the cylinder lightweight.
Hardened S45C Piston Rod
The piston rod is produced from S45C high-carbon steel and heat-treated to improve hardness, wear resistance, and long-term durability.
PTFE Self-Lubricating Bearing
The PTFE + brass bearing minimizes friction, reduces wear, and provides smooth piston rod guidance without frequent lubrication.
High-Quality Sealing System
The sealing system combines PU and NBR materials to provide:
- Excellent air tightness
- Low friction
- Long sealing life
- Stable performance under continuous operation
Applications
The DNC Cylinder Repair Kit is widely used in:
- Packaging machines
- Automatic assembly lines
- Textile machinery
- Food processing equipment
- Woodworking machines
- Material handling systems
- CNC automation
- Printing equipment
- Industrial robots
- General factory automation
Benefits
Using a complete repair kit instead of replacing the entire cylinder offers several advantages:
- Lower maintenance costs
- Faster repairs
- Reduced production downtime
- Extended cylinder service life
- Consistent operating performance
- Easier inventory management for maintenance departments
Quality Control
Every repair kit is manufactured under strict quality standards.
Before shipment, each batch undergoes:
- Material inspection
- Precision machining verification
- Seal dimensional inspection
- Surface treatment inspection
- Assembly compatibility testing
- Final quality inspection
This ensures every component meets the dimensional requirements of ISO 15552 cylinders.
OEM & Custom Service
We offer flexible OEM and ODM solutions, including:
- Customized repair kit configurations
- Company logo laser marking
- Individual spare part supply
- Customized packaging
- Bulk production for distributors
- Technical support for cylinder rebuilding
Frequently Asked Questions
Q1: What cylinders are compatible with this repair kit?
This kit is designed for ISO 15552 DNC pneumatic cylinders in bore sizes from 32 mm to 125 mm.
Q2: Can I purchase individual spare parts?
Yes. Individual components such as pistons, seals, bearings, front covers, rear covers, piston rods, and barrels are available separately.
Q3: Is the magnet included?
A piston magnet is available as an optional component for cylinders used with magnetic sensor switches.
Q4: Can you customize the repair kit?
Yes. We can customize component combinations, packaging, labeling, and branding according to your requirements.
Q5: Do you support OEM production?
Yes. We supply OEM and private-label repair kits for pneumatic distributors, machine builders, and industrial equipment manufacturers worldwide.

