Drive System (Motor & Gearbox) for Decoilers

Product Specifications

Technical details and manufacturing context for Drive System (Motor & Gearbox)

Definition

The drive system is a critical mechanical subsystem within decoilers and uncoilers, responsible for converting electrical energy into controlled mechanical rotation to unwind coiled materials such as metal sheets, wires, or films at precise speeds and tensions. It typically consists of an electric motor coupled to a gearbox, which together regulate the torque and rotational speed required for the unwinding process. The motor, which may be AC, DC, or servo type, generates rotational motion. This motion is transmitted to the gearbox, which adjusts the speed and increases torque through gear reduction. The output shaft of the gearbox connects to the decoiler mandrel or shaft, providing the controlled force needed to unwind the coil. The system is often integrated with control units like variable frequency drives (VFDs) or programmable logic controllers (PLCs) to manage acceleration, deceleration, and maintain consistent line tension. Key parameters for selection include rated power (0.75–7.5 kW), output torque (50–500 N·m), output speed range (20–500 r/min), gear ratio (5–100), efficiency (≥92% per ISO 1328), backlash (≤0.1° per ISO 1328), supply voltage (380–480 V AC per IEC 60038), frequency (50–60 Hz per IEC 60038), operating temperature (-10–40 °C), ingress protection (IP54–IP65 per IEC 60529), noise level (≤75 dB(A) per ISO 3746), and weight (50–300 kg). Materials typically include electrical steel for motor laminations, copper windings, steel alloy for gearbox housing and gears, aluminum alloy for motor housing, and industrial grease or lubricant. These values are reference ranges and must be verified with the legal manufacturer or supplier for specific models and applications.

Working Principle

An electric motor (AC, DC, or servo) generates rotational motion. This motion is transmitted to a gearbox, which adjusts the speed and increases torque through gear reduction. The output shaft of the gearbox connects to the decoiler mandrel or shaft, providing the controlled force needed to unwind the coil. The system is often integrated with control units (like VFDs or PLCs) to manage acceleration, deceleration, and maintain consistent line tension.

Common Materials

Electrical steel (motor laminations), Copper windings, Steel alloy (gearbox housing and gears), Aluminum alloy (motor housing), Industrial grease/lubricant

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Power	0.75–7.5 kW	Select based on coil weight and required torque.
Output Torque	50–500 N·m	Must exceed peak unwinding torque.
Output Speed Range	20–500 r/min	Match line speed and coil diameter.
Gear Ratio	5–100	Determines torque multiplication and speed reduction.
Efficiency	≥92 %	Higher efficiency reduces energy loss.ISO 1328
Backlash	≤0.1 °	Low backlash for precise tension control.ISO 1328
Supply Voltage	380–480 V AC	Three-phase, 50/60 Hz.IEC 60038
Frequency	50–60 Hz	Compatible with regional power grids.IEC 60038
Operating Temperature	-10–40 °C	Outside range may require derating or cooling.
Ingress Protection	IP54–IP65	Higher IP for dusty or wet environments.IEC 60529
Noise Level	≤75 dB(A)	At 1 m distance, under load.ISO 3746
Weight	50–300 kg	Affects installation 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

Electric Motor
Converts electrical energy into rotational mechanical energy.

Material: Electrical steel, copper, aluminum
Gearbox
Reduces motor speed and increases torque via gear trains; provides the final output drive.

Material: Steel alloy, cast iron
Coupling
Connects the motor shaft to the gearbox input shaft, transmitting torque while accommodating minor misalignments.

Material: Steel, elastomer
Output Shaft Part
Delivers the final torque and rotation from the gearbox to the decoiler mandrel.

Material: Hardened steel alloy

Applied To / Applications

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

Decoiler / Uncoiler

View system integration details

Manufacturers of Drive System (Motor & Gearbox)

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Frequently Asked Questions

What is the role of the gearbox in the drive system?

The gearbox adjusts the rotational speed and increases torque through gear reduction, matching the motor's output to the decoiler's requirements for unwinding coiled material at controlled speeds and tensions.

How do I select the right rated power for my decoiler?

Rated power should be selected based on coil weight and required torque. The reference range is 0.75–7.5 kW, but you must verify the specific requirements with the legal manufacturer or supplier for your application.

What does the efficiency parameter indicate?

Efficiency indicates how effectively the drive system converts electrical energy into mechanical rotation. Higher efficiency reduces energy loss. The reference value is ≥92% per ISO 1328, but actual performance must be confirmed with the manufacturer.

Why is low backlash important?

Low backlash (≤0.1° per ISO 1328) ensures precise tension control during unwinding, minimizing variations that could affect material quality. Verify the actual backlash with the supplier for your specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (mechanical system, not fluid pressure)
other spec:	Max torque: 500-5000 Nm (model dependent), Speed range: 0-1500 RPM, Duty cycle: S1 continuous or S3 intermittent (up to 60% ED)
temperature:	-20°C to +80°C (ambient operating range)

Drive System (Motor & Gearbox)

Product Specifications

Applied To / Applications

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