Chicago BPU 412-6 12-gauge sheet metal up to 48″ wide

The Chicago BPU 412-6 is a manual (hand-operated) box & pan brake built for forming precise bends, boxes, trays, and pans in sheet metal up to 12-gauge mild steel. Known for its robust construction and legendary reliability, it is a staple in metal fabrication shops, HVAC facilities, and maintenance departments.

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What It Does

The BPU 412-6 is used to bend and shape flat sheet metal into:

• Boxes and pans with sides

• Flanges, hems, or offsets

• Angular bends (0–135°)

• Custom-formed enclosures or sheet metal parts

It’s especially useful for forming parts that require multiple sides, such as:

• Electrical panels

• HVAC duct boxes

• Tool trays

• Brackets or housings

The removable fingers make it easy to bend tabs, sides, and segmented sections that would be impossible on a straight brake.

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Key Specifications

Specification Detail

Model BPU 412-6

Bending Length 48″ (4 feet)

Maximum Capacity 12 gauge mild steel (approx. 0.1046″ thick)

Maximum Box Depth ~4–5 inches (based on finger removal)

Bend Angle Range Up to 135° (adjustable stop for repeatability)

Clamping Style Manual clamp lever

Fingers (Box & Pan Dies) Removable/adjustable for custom bends

Weight Approx. 1,000–1,200 lbs

Operation Manual (no electric or hydraulic assist)

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Core Features & Capabilities

• Segmented Finger Dies: Allows for forming closed boxes, channels, and narrow profiles

• Manual Clamping Handle: Provides fast setup and precision bending control

• Heavy-Duty Frame: Welded steel frame for long-term durability and rigidity

• Spring-Loaded Counterbalance: Assists operator in lifting the apron smoothly

• Adjustable Stops: For consistent repeat bends

• Precision Bearings: Smooth and accurate hinge motion for controlled bends

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Common Applications

• Sheet metal box/pan fabrication

• HVAC ductwork (end caps, transitions)

• Automotive restoration & bodywork

• Electrical enclosures

• Custom panels and sheet components

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Industries That Use It

• Metal fabrication

• Sheet metal & HVAC shops

• Electrical enclosure manufacturers

• Maintenance departments

• Technical colleges and training facilities

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Summary Description

The CHICAGO BPU 412-6 is a hand-operated, precision box & pan brake designed for forming 12-gauge sheet metal up to 48″ wide. With removable segmented fingers and a heavy-duty frame, it enables accurate forming of boxes, pans, flanges, and other complex bends—making it a reliable solution for fabricators, repair shops, and educational settings.