Automatic Column Type Band Saws (Gantry)
How Do Big Stone Automatic Column Type Band Saws (AW & BS Series) Optimize High-Precision Solid Steel & Bundle Cutting?
Big Stone Machinery Automatic Column Type Band Saws (AW Straight-Cutting Series and BS/BSN Bundle Cutting Series) are purpose- built for heavy-duty mass production of tool steel, solid carbon steel bars, structural sections, and thick-walled pipes. Featuring a rigid twin-column gantry guide system, these saws eliminate torsional deflection and vibration inherent in pivot-style scissor saws, covering cutting capacities from Ø260 mm to Ø600 mm (10.2 to 23.6 in.). All models include an automatic hydraulic dual hitch feed vice system supporting multi-index indexing with repeat accuracy of ±0.1 mm, while the CF-325BSN is equipped with specialized top-mounted hydraulic pack clamps to prevent tube spinning during bundle cutting. Fully certified with CE safety standards, manufactured directly at Big Stone headquarters in Taiwan.
Key Engineering Advantages of Automatic Column Metal Band Saws
Large-diameter chrome-plated guide columns and linear guideways evenly distribute vertical cutting resistance, ensuring strict perpendicular cut surfaces and maximizing blade life on solid steels.
Rear floating shuttle vice combined with an independent roller feed bed delivers single feed strokes from 400 mm to 600 mm (15.7–23.6 in.), with multi-cycle auto-indexing for long workpiece cutting.
Engineered for high-volume bundle cutting of tubes and small bars. Top-mounted hydraulic clamps firmly secure the entire pack from above, eliminating bar rotation and tooth stripping.
Split front vice securely clamps the workpiece on both sides of the blade kerf for burr-free ends, paired with automatic hydraulic blade tensioning to maintain consistent cutting performance.
AW / BS Series Machine Specifications & Selection Matrix
Big Stone Official Catalog Standards (Dual Metric / Imperial Units)| Model | 90° Cutting Capacity (Round / Rectangular) | Single Feed Stroke | Motor Power & Blade Dimensions | Optimal Industrial Application |
|---|---|---|---|---|
| CF-260AW | ● Ø260 mm (Ø10.2") ■ 260 × 280 mm (10.2" × 11.0") |
400 mm (15.7") (Auto Hitch Feed) |
3.75 kW (5.0 HP) 3660 × 34 × 1.1 mm (144" × 1.34" × 0.043") |
Small-to-medium solid carbon bars, pipes, and mass-cutting production. |
| CF-325BS / BSN | ● Ø330 mm (Ø13.0") ■ 330 × 370 mm (13.0" × 14.6") |
600 mm (23.6") (BS) 450 mm (17.7") (BSN Bundle) |
3.75 kW (5.0 HP) 4430 × 34 × 1.1 mm (174" × 1.34" × 0.043") |
BSN features hydraulic pack clamps for bundle cutting of tubes and bars. |
| CF-360AW | ● Ø360 mm (Ø14.2") ■ 360 × 360 mm (14.2" × 14.2") |
500 mm (19.7") (Auto Hitch Feed) |
3.75 kW (5.0 HP) 4430 × 34 × 1.1 mm (174" × 1.34" × 0.043") |
Die/mold tool steels, solid square blocks, and structural steel sections. |
| CF-460AW | ● Ø460 mm (Ø18.1") ■ 460 × 460 mm (18.1" × 18.1") |
500 mm (19.7") (Auto Hitch Feed) |
5.5 kW (7.5 HP) 5545 × 41 × 1.3 mm (218" × 1.61" × 0.051") |
Large forged steel billets, alloy tool blocks, and heavy structural profiles. |
| CF-600AW (Heavy Flagship) | ● Ø600 mm (Ø23.6") ■ 600 × 600 mm (23.6" × 23.6") |
500 mm (19.7") (Auto Hitch Feed) |
7.5 kW (10.0 HP) 6900 × 54 × 1.6 mm (272" × 2.13" × 0.063") |
Extra-large solid rounds, heavy forge blocks, and high-volume industrial steel centers. |
Selection Guide & Technical Frequently Asked Questions (FAQ)
Q: What are the main advantages of twin-column band saws over pivot-type scissor saws for solid steel cutting?
Twin-column band saws utilize dual heavy-duty guide columns with linear guideways for rigid vertical descent. This eliminates the torsional deflection and vibration common in pivot-type scissor saws, ensuring strict perpendicular cut surfaces on solid alloy bars and tool steels while extending blade life by over 30%.
Q: What is the key difference between CF-325BS and CF-325BSN for bundle cutting?
The standard CF-325BS is equipped with multiple bar clamps with a single feed stroke of 600 mm (23.6 in.). The CF-325BSN features top-mounted hydraulic pack clamps (bundle clamps) with a 450 mm (17.7 in.) feed stroke, designed specifically to lock bundles of round tubes and square pipes securely during high-volume batch cutting, preventing spinning and blade tooth stripping.
Q: How does the dual hitch feed vice system work for multi-index cutting?
The AW series utilizes a dual hitch feed vice mechanism. The rear shuttle vice grips the material and moves forward to the programmed length. The front stationary vice then clamps the workpiece while the rear vice releases and retracts. For parts longer than the single stroke (e.g. 400 mm or 500 mm), the PLC automatically performs multiple indexing cycles with repeat accuracy of ±0.1 mm.
Q: How do AW series column band saws optimize cutting parameters for tough tool steels and stainless steel?
AW machines feature variable frequency inverter blade speed control (20–120 m/min or 20–90 m/min) and variable hydraulic downfeed pressure. When cutting high-hardness steels (e.g. D2/SKD11, P20) or stainless steel (SUS304/316), operators reduce the blade speed to 25–40 m/min with low feed pressure, assisted by flood coolant and automatic hydraulic blade tension to prevent work hardening and tooth stripping.
Automatic Column Type Metal Band Saw
