DEFENDER MACHINE PROTECTION SYSTEM

Round Bellows

Mon, 09 Feb 2026 11:41:04 +0800

Quality NO.1 Round Bellows for Round and Irregular Shafts Protection

A round bellow, also known as a round bellow cover, is a flexible, cylindrical protective cover used on machinery to shield moving parts such as shafts or guideways. It prevents dust, chips, coolant, and debris from entering sensitive components while allowing smooth axial movement and extending equipment service life.

DEFENDER’s WGC round bellow covers are primarily used for protecting lead screws, precision shafts, moving air cylinders, various round shafts and irregular-shape parts. Its outstanding features include resistance to water, oil, temperature and chemicals. These fabric bellows are made from TPU, last a long time, and rarely need replacing, which saves you money on maintenance. This round bellow series exhibits superior protective functions and is available to equip with a center ring that prevents friction between the bellows and the shaft. Ensure smooth operation and long-lasting protection with DEFENDER fabric bellow covers. Contact us to learn more!

Features
- Ideal for shaft protection
- Pneumatic cylinder
- Lead screw
- Precision shafts
- Round shafts
- Irregular-shape shaft
Applications
- CNC lathes, milling machines, grinders, and machining centers
- Automation equipment (lead screws, linear guides)
- Hydraulic/pneumatic cylinders
- Semiconductor, optical, medical, automotive, and aerospace precision machinery
- Forming By Welding For Protective Curtain
  
  1Protective curtain
- 2Center ring
- 3Special weld forming
- 4Venting hole

Aluminum Alloy Apron Roller Cover

Thu, 23 Jan 2025 13:55:34 +0800

Light Weight/ Resistant High-Temperature Chips

The aluminum alloy apron cover is applicable for front plane protection to prevent the small shavings and coolant. Because of the simple structure, it provides the excellent moving, easy to install and without much space. Because of the light weight, the cover can move with high speed.

Wipers

Mon, 09 Feb 2026 09:42:42 +0800

EE series Machine Way Wiper

Suitable For Cleaning Slide Ways And Moving Surfaces.

The way wipers are suitable for cleaning slideways, moving surfaces and preventing any foreign objects entering into the moving surfaces.
Outstanding features integrated such as dust prevention, oil resistance, chemical resistance, water resistance as well as long service life.
The frame is anodic oxidation tread.
Rubber strip is made from PU.

Machine Brushes

Fri, 25 Oct 2024 14:53:57 +0800

FF series Machine Brushes

High Efficiency Dust-and-Chips Removing

Unified brush material is Nylons 66. Nylon 612(anti-static electricity) is optional.
The fixed aluminum bracket is available to use 17/21/31 height of aluminum frame.
High density machine strip brushes provide high efficiency dust-and-chips removing performance.

Roll-Up Cover

Mon, 09 Feb 2026 11:34:34 +0800

Industrial Roll-Up Bellow Covers

Our Roll-Up Covers are specially designed for tight or limited installation spaces, providing excellent protection against chips, oil, coolant, dust, and debris on machine tools and automation equipment.

These industrial roll-up bellow covers provide strong protection against dust and debris, ensuring your equipment lasts longer. They're designed for tight spaces where regular covers can't be used, like on lathe tailstocks. Available in different series (RC, RE, ARE, and KRE), each cover is made for specific industrial needs. The RC series features an easy-to-maintain rolling shaft, while the RE series is made from heat-resistant aluminum for high temperatures. The KRE series uses Kevlar for extra durability.

These covers can be installed both horizontally and vertically and can be customized to fit your needs. Their resistance to high temperatures and chemicals makes them ideal for specialized tasks. Choosing DEFENDER Roll-Up Bellow Covers means reliable protection for your machinery. Please feel free to contact us for further details.

Features

Extremely compact design & Simple, reliable structure : saves valuable space in narrow areas. Keeps critical machine areas clean and safe, extending equipment life
High-strength, eco-friendly PUR fabric curtain with superior tear resistance and durability
Supports multiple material options: PUR, aluminum alloy, Kevlar, etc. for different environments
Fast operation: up to 60 m/min travel speed for high-efficiency production
Fully customizable and modular: tailored size, mounting direction, and features (with/without housing, scraper optional)
Quick & easy installation/maintenance: multiple fixing methods reduce labor costs
Optional Wiping function: Effectively prevents debris from infiltrating machinery, thus minimizing maintenance and downtime.

Applications

Traditional lathes, CNC machines, woodworking equipment
Tailstock rear or confined zones
Horizontal machining centers, tool magazine doors
Automation lines, semiconductor & precision instruments
Medical, optical machinery, and cleanroom applications

Intelligent Automatic Roll-Up Door

Wed, 02 Apr 2025 08:56:00 +0800

MF System Automatic Roll-Up Door

Application

Adapt to Tool Magazine and Automatic Door of Industry 4.0 unmanned station.
Multiple choices for form of bellows, e.g. finned bellows cover, roller cover and aluminum finned bellows cover.
Must in combination with SUN YUAN’s mechanism switch controller.
Customized Automatic Roll-up Bellow Covers are available, based on the required space.

Modular Finned Bellows Cover

Tue, 01 Oct 2024 11:19:54 +0800

MF System

High Traveling Speed

The Finned Bellows is a modular design, which is easy to install on X, Y-axis or X, Y, Z-axis.
Patented Rail

Easy to install and maintain. The entire structure features maximum durability in harsh machining area.
Outstanding Protection

Suitable for use on horizontal machining center and traveling column machining center.
Low Noise

Low damping coefficient with quiet motion.

The MF system can be specially designed to suit the CNC horizontal machining center and the traveling column machining center. Frame and moving rail designs are available. We also offer protection design for spindle movement.
The “Unified System” of the MF modular finned bellows cover system will be equipped with SUN YUAN’s sliding block in combination with FGC series on the axes.
The “High Speed System” of the modular finned bellows cover system will be equipped with SUN YUAN’s sliding wheel mechanism, allowing rapid traverse rate to reach 60 m/min.
If traverse rate over 80 m/min is required, please contact our Int. Trade Department.

Machine Roof Cover

Mon, 09 Feb 2026 10:13:25 +0800

RF System Machine Roof Covers

CNC Machine Covers for Protection and Precision

Machine roof bellow covers are essential for safeguarding your machining center against dust, chips, and other contaminants that can compromise the performance and longevity of your equipment. Moreover, our machine roof covers can be used with our bellows cover to achieve a fully enclosed guard. These covers are designed to glide smoothly on a rail system, ensuring minimal energy consumption and maximum efficiency. DEFENDER's machine roof covers are customizable to fit your specific needs, offering unparalleled protection and noise reduction.

Whether you need a solution for a new machine or a retrofit, DEFENDER offers customized machine protection to meet your specific requirements. Ensure smooth operation and long-lasting protection with DEFENDER Machine Roof Bellows. Contact us to learn more!

Features

Custom-fit solutions: Available in various sizes, constructions, and mounting styles to perfectly match different machine structures and working environments.
High-speed performance: Supports maximum moving speeds up to 60 m/min with low noise and smooth operation.
Superior material quality: High-strength, weather-resistant fabric with excellent water repellency, anti-static properties, and tear resistance.
Full protection: Effectively blocks dust, coolant, oil, and other contaminants to keep machines clean and reliable.
Long-lasting & low maintenance: Built with durable materials and lightweight support beams for extended service life and minimal upkeep.
Advanced control option: PLC interface-controlled versions available through our customized service.
Enhanced safety & cleanliness: These covers help contain dust and particles, reduce noise, and protect both employees and machinery from potential hazards.

Applications

CNC machines & precision equipment
Automated lines
Gantry machining centers
High-dust/oil environments in automotive, aerospace, mold, food and beverage, and metalworking sectors.

Finned Bellows Cover

Mon, 09 Feb 2026 12:02:00 +0800

Stainless Steel Finned Bellows Cover

DEFENDER Stainless Steel Finned Bellows Cover combines advanced materials and design to offer exceptional performance in demanding environments. This Finned Bellows Cover is engineered for high-speed operations, allowing a traverse rate of up to 120 meters per minute. It is specifically designed to handle large volumes of high-temperature chips, making it an ideal choice for environments where traditional metal sheet guards are insufficient. The lamella cover's superior protection capabilities are achieved through its high-hardness stainless steel construction, which prevents damage from high temperatures while maintaining low noise and extended service life.

DEFENDER lamella cover is the ultimate solution for industries seeking high-performance machine protection with exceptional durability and adaptability. Contact us now!
1 High hardness stainless steel
2 Bellows Cover
3 Stiffener
Features

High-hardness stainless steel construction: superior durability and high-temperature chip resistance. Protects precision guideways and transmission components from high-temperature cutting chips
Finned (lamella) bellow design: reduces noise and extends machine service life
Lightweight yet robust: suitable for large-travel applications
High-speed operations: Supports traverse rates up to 120 m/min for high-speed operations
Customization available: Customizable to fit specific machine dimensions and requirements
Flexible installation: vertical, horizontal, or angled mounting

Applications

Horizontal machining centers, traveling column machining centers, and CNC machining centers
Metalworking factories with high-volume or high-temperature chip production
Industries requiring efficient, large-travel machining operations
Factories with strict equipment protection and durability needs
Environments with limited space requiring versatile machine protection solutions

Bellows Cover

Mon, 09 Feb 2026 10:04:18 +0800

Machine Bellow Cover from Defender

The GC Series Bellows Cover is designed to protect precision transmission components and guideways in industrial machinery from dust, oil, coolant, chips, and harsh environmental conditions. By preventing contaminants from entering the machining area, it ensures stable operation of spindles, guide rails, and drive systems while extending overall equipment lifespan. Designed for reliability, protection, and longevity, the GC Series bellows way cover is an ideal electronics bellow for demanding industrial applications. SUN YUAN Technology, also known as DEFENDER, is a leading bellow cover manufacturer committed to providing top-tier protective solutions for moving machine parts. Contact us today to learn more about how our products can meet your specific industrial needs.

Features

Durable and Reliable: Made from high-quality, eco-friendly materials with wear-resistant, self-lubricating components, ensuring long service life and dependable performance in industrial environments.
Customizable and Versatile: Available in various shapes, thicknesses, and mounting options to meet specific requirements, making these milling machine way covers suitable for a wide range of applications.
Superior Protection: Resistant to water, oil, and chemicals, with stiffeners and restricted belts to prevent over-extension and ensure stable performance in high-speed or vertical applications.

Applications

CNC machine tools
PCB drilling and forming equipment
Semiconductor manufacturing systems
Automation equipment
Electronic instruments
Precision machinery operating in high-dust or high-contamination environments.

DEFENDER MACHINE PROTECTION SYSTEM

Round Bellows

Quality NO.1 Round Bellows for Round and Irregular Shafts Protection

Features

Applications

Forming By Welding For Protective Curtain

1Protective curtain

2Center ring

3Special weld forming

4Venting hole

Aluminum Alloy Apron Roller Cover

Light Weight/ Resistant High-Temperature Chips

Wipers

EE series Machine Way Wiper

Suitable For Cleaning Slide Ways And Moving Surfaces.

Machine Brushes

FF series Machine Brushes

High Efficiency Dust-and-Chips Removing

Roll-Up Cover

Industrial Roll-Up Bellow Covers

Features

Applications

Intelligent Automatic Roll-Up Door

MF System Automatic Roll-Up Door

Application

Modular Finned Bellows Cover

MF System

High Traveling Speed

Patented Rail

Outstanding Protection

Low Noise

Machine Roof Cover

RF System Machine Roof Covers

CNC Machine Covers for Protection and Precision

Features

Applications

Finned Bellows Cover

Stainless Steel Finned Bellows Cover

1 High hardness stainless steel

2 Bellows Cover

3 Stiffener

Features

Bellows Cover

Machine Bellow Cover from Defender

Features

Applications