Famous Manual Decoiler Manufacturer & Supplier

A manual decoiler relies on the pulling force generated by downstream equipment (such as a roll former, leveling machine, or punch press feeder) to rotate the coil spindle. It incorporates a passive friction or caliper brake to maintain back-tension and prevent coil overrun when the downstream machine halts. In contrast, motorized decoilers feature an electric motor and gear reducer, while hydraulic decoilers utilize hydraulic pump stations for powered spindle expansion and motor-driven unwinding. Manual decoilers offer lower initial capital expenditure, zero electricity consumption, virtually zero maintenance, and rapid mobility.

Braking torque must dynamically counteract the rotating inertia of the coil ($T = I \cdot \alpha$) without exceeding the yield strength of the uncoiled strip. As the outer diameter (OD) of the coil decreases from maximum to the bare core, the required braking torque also decreases proportionally ($T_{brake} = F_{pull} \cdot R_{coil}$). Wuxi Jianfa manual decoilers feature quick-adjust handwheels with calibrated graduated scales on the caliper assembly, allowing operators to gradually release brake pressure as the coil unspools, preventing excessive strip necking or surface marring.

Yes. To prevent coil core marking and scuffing on delicate surfaces such as PPGI, PPGL, polished brass, or #4 / BA finished stainless steel, Wuxi Jianfa offers polyurethane-coated or rubber-padded mandrel segment shoes. Additionally, high-precision radial expansion linkage ensures continuous circular contact rather than sharp edge-point pressure across the coil interior diameter.

The standard mechanical expansion range of our manual decoiler leaves is Ø 470 mm to Ø 520 mm, matching the vast majority of international steel mill inner core specifications. For facilities processing larger master coils with Ø 610 mm (24-inch) cores, we manufacture precision bolt-on expansion shoe adapters made from cast aluminum or structural steel, extending the operating range up to Ø 620 mm without sacrificing spindle concentricity.

Safety is paramount. All Jianfa manual decoilers feature adjustable lateral coil keeper arms (collars) that lock firmly onto the outer perimeter of the mandrel leaves with quick-release clamping pins. For payload capacities exceeding 3,000 kg, we supply an optional detachable outboard bearing support (A-frame stand) that converts the cantilever shaft into a dual-supported beam, preventing shaft deflection and preventing any risk of axial displacement.

Maintenance requirements are minimal compared to motorized units. Recommended maintenance intervals include: (1) Monthly lubrication of the main pillow block spherical roller bearings via grease zerks using lithium-based EP2 grease; (2) Bi-weekly greasing of the central acme lead screw and wedge sliding tracks; (3) Periodic inspection of the brake caliper or band lining for wear, ensuring thickness does not fall below 2 mm; and (4) Visual inspection of the foundation anchor bolts and welded structural seams.

To provide an accurate engineering proposal and commercial quotation, please supply: (1) Maximum coil weight (e.g., 2,000 kg, 3,000 kg, 5,000 kg); (2) Strip width range (minimum and maximum in mm); (3) Coil Inner Diameter (ID) and Outer Diameter (OD); (4) Processed material type and yield strength (e.g., GI, PPGI, stainless, hot-rolled steel); and (5) Downstream process type (roll former, punch press, cut-to-length line, or slitter).