STO/STW & FLO/FLW Safety Chuck for Air Expanding Shafts

  The XW Machinery STO/STW and FLO/FLW Safety Chuck is designed for high-speed winding and unwinding systems in printing, slitting, packaging, film converting, lithium battery, textile, and paper industries.

  Built for stable torque transmission and fast shaft loading/unloading, this industrial safety chuck provides a secure and efficient connection for air expanding shafts while reducing downtime during roll changes.

  Available in both flange-mounted (FLO/FLW) and foot-mounted (STO/STW) configurations, our safety chucks are manufactured with high-strength alloy steel or lightweight aluminum options to meet different machine requirements.

Key Features

• High torque transmission up to 400Nm
• Fast air shaft loading and unloading
• Compatible with most pneumatic air shafts
• Available in STO/STW and FLO/FLW models
• Custom square hole sizes available
• Heavy-duty alloy steel construction
• Optional lightweight aluminum body
• Stable operation at high winding speeds
• Precision machining for accurate positioning
• Long service life with hardened reel mouth design

Available Types

STO / STW Safety Chuck

Foot-mounted safety chuck design suitable for rewinding and unwinding systems requiring stable base installation.

FLO / FLW Safety Chuck

Flange-mounted safety chuck suitable for compact machine structures and side-frame installations.

Applications

The safety chuck is widely used in:

• Slitting machines
• Flexographic printing machines
• Rotogravure printing machines
• Laminating machines
• Coating machines
• Packaging machinery
• Film converting equipment
• Lithium battery production lines
• Textile winding systems
• Paper processing machinery

Technical Specifications

Why Choose XW Machinery Safety Chucks?

At XW Machinery, we focus on high-precision tension control and winding system components for industrial converting applications.

Our safety chucks are engineered for:

• Smooth torque transmission
• Reduced machine vibration
• Faster roll replacement
• Long-term durability
• Stable operation under heavy loads

We also support OEM customization for:

• Special shaft dimensions
• Custom torque requirements
• Non-standard square holes
• Aluminum lightweight structures
• Surface coating requirements

Advantages Over Traditional Shaft Locking Systems

Compared with conventional shaft fixing methods, safety chucks significantly improve:

• Operator safety
• Roll changing efficiency
• Machine uptime
• Torque stability
• Production consistency

This makes them ideal for modern automated converting lines.

What is the difference between STO/STW and FLO/FLW safety chucks?

STO/STW models are foot-mounted, while FLO/FLW models are flange-mounted. Both are designed for secure air shaft support and torque transmission.

Can the square hole size be customized?

Yes. XW Machinery supports customized square hole dimensions according to your air shaft specifications.

What industries use safety chucks?

Safety chucks are commonly used in printing, slitting, packaging, film converting, paper, textile, and lithium battery industries.

What materials are available?

We offer high-strength alloy steel and lightweight aluminum options depending on machine requirements.

Are your safety chucks compatible with pneumatic air shafts?

Yes. Our safety chucks are designed for most standard air expanding shafts and pneumatic winding systems.