Uncoilers are an essential component in various manufacturing processes, aiding in the smooth unwinding of coils for further production. While powered and hydraulic uncoilers are commonly used, there exists another type – the non-powered uncoiler – which is less frequently employed but offers unique advantages in specific scenarios.

Understanding the Non-Powered Uncoiler

The non-powered uncoiler, though less popular than its counterparts, serves specific purposes exceptionally well. Its distinct feature lies in its smaller material waiting interval, which translates to reduced production line layout space, effectively saving valuable factory floor area. As a result, it is extensively used in special processing applications such as stamping shelves and motor EI lamination. However, using it correctly requires customers to familiarize themselves with its structure and maintenance requirements.

A Look Inside

Visually, the non-powered uncoiler closely resembles the powered uncoiler, except for one prominent difference. The powered version features an electrical box on the side, whereas the non-powered version comes equipped with a brake wheel on top (standard model). However, the internal structures of these two types vary significantly.

Inside the main body of the non-powered uncoiler, there are no motors, reducers, or pulleys. Instead, it relies on the traction force generated by subsequent straightening machines (or feeders if the production line lacks a straightening machine) to drive the unwinding process. The non-standardized traction force can sometimes lead to excessive unwinding of the uncoiler due to large inertia. To address this, the non-powered uncoiler is equipped with a brake device in addition to the standard configuration.

The Braking Mechanism

The non-powered uncoiler uses two types of brakes to ensure proper control during the unwinding process.

1. Drum-Type Brake Device

This standard brake device features a brake disc at the top, easily recognizable externally. During braking, the tension from the spring pulls the brake shoe into contact with the inner edge of the brake drum. As a result, friction is generated, suppressing the rotation of the spindle and achieving the purpose of braking. The advantage of this type of brake is its low cost, making it a cost-effective choice for stamping customers. However, it is not well-suited for thick or heavy materials. When dealing with materials exceeding 2 tons or being too thick, this brake method can lead to excessive inertia, rapid wear of brake pads, and the need for frequent replacements. Furthermore, there might be instances of brake pad fractures, resulting in significant material dispersion.

2. Pneumatic Disc Brake Device

For unwinding thick and heavy materials without power, the non-powered uncoiler can be equipped with a pneumatic disc brake device. This type of brake is installed at the rear of the uncoiler body and employs air pressure to clamp the brake pads onto the circular disc, which is fixed to the material rack spindle and rotates at the same speed. The pneumatic disc brake device delivers a highly effective braking effect, and the brake pads have a long service life, usually exceeding two years, without the need for frequent replacements.


The non-powered uncoiler offers a valuable space-saving solution for specific processing scenarios in manufacturing. By understanding its structure and brake options, customers can utilize this equipment effectively and ensure a smooth unwinding process. Whether opting for the standard drum-type brake device or the pneumatic disc brake device, each comes with its advantages and considerations. Proper application of the non-powered uncoiler can lead to enhanced production efficiency and cost-effectiveness in specialized manufacturing setups.