Bel Mark Industries

• Belmarkair expanding shaft delivers superior performance for winding application in the widest range of roll handling process.
• Belmark air expanding shaft is one of the best cores gripping having the widest range from heavy to light duty work.
• Belmarkair expanding shaft minimizes reel change over time.
• Belmarkair shaft does not lead to any harm at the core surface.

Air Expanding Shafts offered provide suitable support as core-holding device Used for paper/PVC core holding, these lugs type air expanding shafts can be used with safety chucks for smooth handling of winding operations.

Available with one side shaft for mounting purposes; air valve can locate at face length/shaft end as per the requirements; superior valve fitting and PTFE tape sealing of valve thread to avoid damage of O rings; avoid overfilling of air for avoiding puncture of air bladder special air gun.

Cantilever Air Shaft offered to come in precision designed construction finish and can be made available in different specifications to match up with specific process needs and machine configuration as required by the customers. Further, these provide for lasting usage and are made available at competitive prices. 

Features:

• Extra heavy duty rotating assembly.
• Renewable wear ring or wear plate options.
• All models can be custom engineered to your most demanding applications.
• VNCB is for medium duty applications; VNCT is for severe duty applications.

Three Core Lug Air Shafts is used for fast changing of core for winding and unwinding air shaft is used most of the converting machines.

Mild Steel Safety Chucks are mechanical devices used for secure and quick engagement of winding and unwinding shafts in roll-to-roll web processing machinery. These chucks provide a safe, reliable, and time-saving method for loading and unloading rolls, minimizing downtime and enhancing operator safety. Constructed from high-grade mild steel (MS), they are ideal for medium- to heavy-duty applications across a variety of industries.

Key Features:

• Material: Rugged Mild Steel construction for high strength and durability

• Quick Locking Mechanism: Allows rapid shaft engagement and disengagement without tools

• Flange or Foot Mounting: Available in both foot-mounted and flange-mounted versions

• Interchangeable Inserts: Accommodates different shaft end configurations (square, round, or customized)

• High Torque Handling: Designed to transmit torque efficiently for winding and unwinding operations

Technical Specifications:

• Bore Sizes: Available from 20 mm to 75 mm or customized

• Mounting Options: Foot-mounted or flange-mounted

• Load Capacity: Varies by size, suitable for medium and heavy rolls

• Material Finish: Machined and powder-coated or painted for corrosion resistance

• Insert Type: Replaceable inserts (standard square, triangle, or custom)

• Operating Mode: Manual open/close with spring-loaded safety lock

Applications:

• Paper and board processing machinery

• Flexible packaging and plastic film lines

• Textile and nonwoven fabric converting

• Slitting, rewinding, and laminating machines

• Printing and coating systems

Foot Mounting Safety Chucks are mechanical devices used to safely and efficiently hold and drive winding/unwinding shafts in web handling equipment. Designed for easy installation at the machine base, these chucks offer fast shaft engagement and secure torque transmission. Their foot-mounted design provides excellent stability and makes them suitable for high-speed, heavy-duty roll-to-roll operations across various industries.

Key Features:

• Mounting Type: Rigid foot base for bolting directly to machine frames or platforms

• Material Construction: Available in Mild Steel (MS) with optional surface coatings (zinc, powder-coated, or painted) for corrosion resistance

• Quick Engagement: Manual open/close mechanism for fast shaft loading and unloading

• Interchangeable Inserts: Accommodates a variety of shaft end profiles (square, triangle, customized)

• High Torque Capacity: Designed to transfer torque smoothly for winding and unwinding applications

Technical Specifications:

• Shaft Bore Sizes: 20 mm to 75 mm (customizable)

• Load Capacity: Suitable for light, medium, and heavy-duty operations

• Operating Speed: Compatible with high-speed lines

• Safety Locking System: Spring-loaded mechanism prevents accidental shaft disengagement

• Finish Options: Machined, painted, or plated surfaces for durability

Applications:

• Paper and board converting machines

• Flexible packaging and film processing lines

• Textile, foil, and nonwoven machinery

• Slitting, laminating, and coating systems

• Rewinding and unwinding stations

Advantages:

• Safe and fast shaft changeovers reduce downtime

• Stable foot mounting ensures vibration-free performance

• Cost-effective and durable for long-term use

• Easily replaceable inserts minimize maintenance costs

• Provides consistent performance under heavy loads

Lugs Type Air Shaft offered can be made available by us in different configuration choices and meet the demands of fast changeover of un-winder/winder roll.

Finding use in core holding applications, these air shafts come with air valve support and supports holding core by expanding of rubber bladder. Some of its features include core getting released post removal of air by thump press; common core used is with 3 ID; choice of bigger cores as per the user needs with heavy weight unwind/re-wind rolls; provides working as core-holding device; commonly used for paper/PVC core holding; can be used with safety checks for winding allows for easy replacement of tube.