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Bianco 420 Premium Semi Automatic Bandsaw with Advanced Controls
The Bianco 420 SA is a semi automatic horizontal bandsaw with cutting capacities up to 60 degrees right, manufactured in Italy by Bianco since 1982. This machine uses hydraulic controls for both bow and vice movement, with automatic fast up and down cycles controlled by a feeler pin system.
The 420 SA handles rounds up to 300mm diameter, squares to 240mm, and rectangles measuring 420x200mm at 90 degrees. At 45 degrees, cutting capacity reaches 240mm round and 270x140mm rectangle, whilst 60 degree mitre cuts accommodate material up to 170mm. The dual-speed motor operates at 35 or 70 metres per minute, letting you adjust cutting speed based on your material type and thickness. Hydraulic controls manage the bow descent with infinitesimal adjustment for precise cutting pressure, whilst the feeler pin triggers automatic transition from rapid approach to controlled cutting speed once it contacts your workpiece.
The machine features hardened and ground gears in the reducer unit, aluminium bow construction, and a low voltage electrical system meeting CE compliance standards. Bianco maintains spare parts availability for 20 years after purchase, ensuring long-term serviceability.
Applications
- Structural Steel Fabrication: Cut angles, channels, I-beams, and rolled sections for construction frameworks and architectural metalwork with angles up to 60 degrees
- Tube and Pipe Cutting: Handle hollow sections for tubing assemblies, railings, and structural frameworks with the 420x200mm rectangular capacity at 90 degrees
- Heavy-Duty Production Runs: Process medium to large volume cutting operations using the semi-automatic cycle that controls descent and return automatically
- Precision Metal Components: Produce parts requiring accurate angle cuts for engineering assemblies with the infinitesimal feed adjustment system
- Building Services Framework: Cut support structures and framework components for heating, ventilation, and ducting systems in commercial and residential construction
- Machine Shop Operations: Prepare blanks and stock for secondary machining operations with repeatable cuts maintained by the hydraulic control system
Key Features & Benefits
- Semi-Automatic Hydraulic Operation: The bow raises and lowers automatically during cutting cycles, with hydraulic controls managing both bow and vice movement to reduce manual intervention
- Precision Angle Cutting to 60 Degrees Right: The quick-mitring swivel head adjusts angles for structural connections and custom geometry without complex repositioning
- Dual-Speed Motor (35 or 70 m/min): Two preset cutting speeds let you match blade speed to your material requirements for optimal cutting performance
- Hydraulic Infinitesimal Feed Control: Adjust cutting pressure with infinitesimal precision to match material hardness and prevent blade strain
- Intelligent Feeler-Pin Control System: Automatic fast approach lowers the blade rapidly until the feeler pin contacts material, then switches to controlled cutting speed, reducing cycle time
- Hardened Aluminium Bow Construction: The bow is constructed from aluminium for structural stability during cutting operations
- Hardened and Ground Gear Reducer: The reducer unit uses hardened and ground gears for reliable power transmission
- Integrated Coolant System: A 0.06 kW cooling pump circulates coolant to the blade during cutting operations
- CE-Compliant Safety System: Double safety button for cycle start and low-voltage electrical system according to EC regulations
What's in the Box
- Bianco 420 SA semi-automatic bandsaw machine
- Millimetre rule (0-500mm) with mechanical length stop
- Discharge tray
- Cleaning brush
- User manual and technical documentation
Specifications
| Cutting Capacity at 90° (Round) | 300 mm |
|---|---|
| Cutting Capacity at 90° (Square) | 240 mm |
| Cutting Capacity at 90° (Rectangle) | 420 x 200 mm |
| Cutting Capacity at 45° (Round) | 240 mm |
| Cutting Capacity at 45° (Square) | 230 mm |
Manuals & Downloads
Frequently Asked Questions
What power supply does the 420 SA require?
The machine requires a 400V 3-phase 50Hz electrical supply. Both the blade motor (0.9-1.5 kW) and hydraulic unit motor (0.37 kW) operate on this power supply. Ensure your workshop has the appropriate electrical infrastructure before installation.
How does the semiautomatic operation work?
Once you position your material and press the double safety button, the feeler pin controls the bow movement automatically. The bow descends rapidly until the feeler pin contacts the material, then switches to controlled cutting speed. After completing the cut, the bow returns to the starting position automatically, ready for the next cycle.
What angles can the machine cut?
The quick-mitring swivel head adjusts from 0° to 60° to the right. This covers standard angle requirements for most fabrication work. If you need double-mitring capability (both left and right angles), you would need to consider the 420 SA R model instead.
What blade size does this machine use?
The 420 SA uses bandsaw blades measuring 3270 x 27 x 0.9 mm. This is a standard size available from most industrial blade suppliers. The machine operates at two speeds (35 or 70 m/min), allowing you to match blade speed to different materials and blade tooth configurations.
How do I adjust the cutting pressure?
The hydraulic system includes infinitesimal adjustment for cutting progress. This lets you fine-tune the downward pressure of the blade based on material hardness and thickness. Lighter pressure works for softer materials and prevents blade overload, whilst increased pressure speeds cutting on softer metals.
What maintenance does the machine require?
Regular maintenance includes monitoring coolant levels in the system, checking hydraulic fluid levels, inspecting blade tension and condition, and cleaning the swarf brush and discharge tray. Bianco provides spare parts availability for 20 years, ensuring long-term serviceability.
What's the difference between the 420 SA and other 420 models?
The 420 SA cuts angles to 60° right only. The 420 SA R model adds left-side cutting capability (double mitring). The 420 SAE model includes electronic features. Each variant uses the same basic platform with different angle-cutting configurations.