Tensioning Rollers for Sammying and Setting Machines

Product Specifications

Technical details and manufacturing context for Tensioning Rollers

Definition

Tensioning rollers are critical components within a Sammying and Setting Machine, responsible for applying precise and consistent tension to materials (typically leather, textiles, or similar flexible sheets) as they pass through the machine. This ensures proper alignment, prevents wrinkles or slack, and maintains uniform material properties during the sammying (dampening/stretching) and setting (drying/shaping) processes. These rollers are typically mounted on adjustable or spring-loaded mechanisms, allowing them to exert a controlled opposing force on the material. The tension can be adjusted manually or automatically via sensors and control systems to compensate for material variations, ensuring consistent processing quality throughout the operation. Tensioning rollers are available in various configurations, with roller diameters ranging from 150 to 600 mm, face widths from 300 to 2500 mm, and maximum load capacities from 5 to 50 kN. Surface runout is held to 0.02–0.05 mm per ISO 1101, and surface roughness ranges from Ra 0.4 to 1.6 μm per ISO 4287. Operating temperature range is -20 to 80°C, and maximum speed is 300 to 1200 m/min. Dynamic balancing grades per ISO 1940-1 are G2.5 to G6.3. Roller materials include 45# steel or 304 stainless steel, with surface coatings of hard chrome or rubber. Bearing types include deep groove or spherical. Weight ranges from 100 to 1500 kg. These specifications are reference ranges; actual values must be confirmed for the specific model and application. Tensioning rollers are used in machinery for processing flexible materials, and their selection depends on material type, width, speed, and tension requirements. Proper installation and maintenance are essential to avoid roller deflection, vibration, and premature wear. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Tensioning rollers are typically mounted on adjustable or spring-loaded mechanisms. As material passes over them, the rollers exert a controlled opposing force, creating tension. This tension can be adjusted manually or automatically via sensors and control systems to compensate for material variations, ensuring consistent processing quality throughout the operation.

Common Materials

Chrome-plated steel, Stainless steel, Polyurethane, Rubber

Technical Parameters

Parameter	Typical range	Notes & selection driver
Roller Diameter	150–600 mm	Determines wrap angle and material contact area.
Face Width	300–2500 mm	Must match material web width.
Maximum Load Capacity	5–50 kN	Exceeding may cause roller deflection.
Surface Runout	0.02–0.05 mm	Tighter tolerance for high-speed lines.ISO 1101
Surface Roughness	Ra 0.4–1.6 μm	Affects friction and material marking.ISO 4287
Operating Temperature	-20–80 °C	Outside range may degrade rubber coating.
Maximum Speed	300–1200 m/min	Higher speeds require dynamic balancing.
Dynamic Balancing Grade	G2.5–G6.3	Critical for vibration-free operation.ISO 1940-1
Roller Material	45# steel / 304 SS	Stainless for corrosive environments.
Surface Coating	Hard chrome / Rubber	Rubber for high friction, chrome for wear.
Bearing Type	Deep groove / Spherical	Spherical for misalignment compensation.
Weight	100–1500 kg	Affects handling and structural support.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Roller Core/Shaft Part
Provides structural support and rotational axis for the roller.

Material: Steel alloy
Roller Surface/Covering Part
Direct contact surface with the material; provides grip and protects the material.

Material: Polyurethane, rubber, or chrome plating
Bearing Assembly
Enables smooth rotation of the roller with minimal friction.

Material: Steel with lubricant
Tension Adjustment Mechanism
Allows for manual or automatic adjustment of the applied tension force (e.g., spring, pneumatic cylinder, servo motor).

Material: Steel, aluminum, various mechanical components

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Sammying and Setting Machine

View system integration details

Manufacturers of Tensioning Rollers

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Frequently Asked Questions

What are the typical materials used for tensioning rollers?

Common materials include chrome-plated steel, stainless steel, polyurethane, and rubber. The choice depends on the application, such as corrosion resistance or friction requirements.

How do I select the right roller diameter and face width?

Roller diameter affects wrap angle and material contact area, while face width must match the material web width. Refer to the specified ranges (diameter 150-600 mm, face width 300-2500 mm) and confirm with the manufacturer for your specific process.

What is the significance of dynamic balancing grade?

Dynamic balancing grade (G2.5 to G6.3 per ISO 1940-1) ensures vibration-free operation at high speeds. Higher grades are required for higher speed lines to prevent excessive vibration and premature bearing failure.

Can tensioning rollers be used in corrosive environments?

Yes, stainless steel rollers (e.g., 304 SS) are suitable for corrosive environments. For high friction, rubber coatings are used; for wear resistance, hard chrome coatings are applied. Always verify material compatibility with your process conditions.

Data Basis

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Preliminary Technical Classification

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pressure:	Max 10 bar contact pressure
other spec:	Max linear speed: 5 m/s, Material thickness range: 0.1-10 mm
temperature:	-20°C to 120°C

Tensioning Rollers

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards