BS400S

CNC Automatic-Servo-Metal-Bandsaw

What Machining Challenges Does the Bigstone BS400S CNC All-Servo Bandsaw Solve?

The Big Stone BS400S is a high-precision CNC automatic horizontal metal bandsaw engineered and manufactured at our Hsinchu headquarters in Taiwan. Utilizing a Dual Servo Drive System (AC servo motors paired with precision ball screws for both saw frame downfeed and material indexing), the BS400S eliminates thermal drift and feeding fluctuations typical of traditional hydraulic systems, working in tandem with a 1.5 kW (2.0 HP) high-rigidity hydraulic clamping system. It delivers a cutting capacity of Ø400 mm / 400 × 400 mm (15.75" × 15. 75"), 0.1 mm (±0.004") repeatability, and an industry-leading 25 mm (0.98") ultra-short remnant length (saving 55 mm of expensive material per 6-meter raw bar). Certified under CE safety standards and ISO 14064-1 GHG inventory, the BS400S features a 360° fully enclosed safety cabin (operating noise < 75 dB(A) with zero mist/chip leakage), tailored specifically for continuous mass production of semiconductor parts, SUS304/316L stainless steel, tool steels, and aerospace titanium alloys.

📍 Taiwan Hsinchu Plant: Direct Manufacturing 🛡️ CE Declaration of Conformity / ISO 14064-1 ⚡ Dual Servo Drive: Ball Screw Downfeed & Infeed 💰 25mm Ultra-Short Remnant (-68% Scrap Loss)
Features

BS400S Technical Specifications & Cutting Performance

Official Standard Configuration (2026 Edition)
Big Stone BS400S CNC All-Servo Automatic Metal Bandsaw Technical Specification Table
Technical Parameter BS400S Official Standard Data
90° Cutting Capacity (Round / Square) Ø400 mm / 400 × 400 mm (15. 75" × 15.75")
Bundle Cutting Capacity (H × W) 20 – 300 mm × 150 – 300 mm (0.79" – 11.8" × 5.9" – 11.8") (Top hydraulic clamping optional)
Saw Head Downfeed Mechanism AC Servo Motor + Precision Ball Screw (Constant chip load, zero thermal drift)
Material Infeed Drive System AC Servo Motor + Precision Ball Screw (Servo Infeed)
Material Clamping System Heavy-duty 1.5 kW (2.0 HP) hydraulic vise clamping with jaw retract protection
Positioning Repeatability (Single / Multi-Stroke) 0.1 mm (±0.004") (Single stroke 600 mm / 23.6", zero multi-stroke error accumulation)
Minimum Remnant Length (Scrap Length) 25 mm (0. 98 in.) (Saves 55 mm scrap per 6-meter raw bar)
Blade Motor & Blade Speed 5.75 kW (7.7 HP) Inverter VFD (20 – 150 m/min / 66 – 492 FPM)
Blade Dimensions (Standard) 5300 × 41 × 1.3 mm (208.7" × 1.61" × 0.051") (Bi-metal & Carbide compatible)
Working Table Height & Overall Dimensions Table Height: 750 mm (29.5"); Dimensions: 1750 × 3000 × 1920 mm (68.9" × 118.1" × 75.6")
Control Interface & Program Memory 10-Inch Industrial CNC Touchscreen (Supports offline programming & multi-job batches)
Machine Net Weight 3,000 kg (6,614 lbs) Rigid Monobloc Cast Iron Base
Safety & Environmental Standards 360° Fully Enclosed Safety Cabin, Door Interlock, Noise < 75 dB(A), CE / ISO 14064-1 Certified

Watch BS400S in Action: Dual Servo Ball Screw CNC Bandsaw Cutting Demonstration

Frequently Asked Questions by Metal Fabricators & Machine Tool Buyers (FAQ)

Q1: We frequently cut SUS304/316L stainless steel and tool steels where traditional hydraulic saws suffer blade tooth stripping due to feed surges. How does BS400S prevent this?
Answer: Hydraulic downfeed systems experience oil viscosity variations as operating temperatures rise, leading to uncontrolled surging that fractures carbide teeth. The BS400S uses an AC servo motor paired with a precision ground ball screw to maintain constant chip load feeding. It dynamically adjusts downfeed speed based on material resistance, eliminating thermal drift and extending carbide blade life by 25% to 40%.
Q2: When cutting 6-meter raw bars of high-value titanium or superalloys, what is the minimum remaining scrap length on the BS400S?
Answer: The minimum remaining remnant length is only 25 mm (0.98 in.). Conventional bandsaws typically leave 70 to 100 mm of waste due to vise geometry. The BS400S utilizes a patented short-remnant vise and servo indexing mechanism, saving over 50 mm of scrap per 6-meter raw bar and delivering massive cost reductions on expensive raw materials.
Q3: Will heavy 400 mm solid steel blocks slip during high-speed feeding? What is the actual infeed repeatability?
Answer: Material slippage is completely eliminated. The BS400S is driven by an AC servo motor with precision ball screw feeding, integrated with a 1.5 kW dedicated hydraulic clamping vise. Single-stroke (600 mm / 23.6") positioning repeatability is strictly maintained within 0.1 mm (±0.004"), and multi-stroke indexing prevents cumulative tolerance errors without manual re-measuring.
Q4: When bundle cutting multiple small tubes, how does the machine prevent inner workpieces from spinning or vibrating?
Answer: By equipping the optional hydraulic top clamping vise, the machine locks workpieces firmly from both vertical and horizontal directions. Combined with smooth servo downfeed engagement, inner tubes remain completely stationary with zero vibration, producing perfectly square, burr-free bundle cuts.
Q5: What practical advantages does the fully enclosed safety enclosure provide for workshop environments?
Answer: The 360° fully enclosed cabin reduces operating noise to under 75 dB(A) while containing 100% of cutting coolant mist and hot metal chips within the chamber. It meets ISO 14064-1 green cleanroom standards and CE safety door interlock directives, keeping factory floors clean, dry, and safe.
Q6: Can the machine execute multi-length batch cutting programs and integrate with motorized roller tables?
Answer: Yes. The 10-inch CNC touchscreen supports offline programming and multiple length/quantity preset storage, enabling uninterrupted slicing of entire bars. Built-in industrial I/O signal interfaces connect directly to external motorized infeed/outfeed roller tables for automated turnkey handling.
Q7: How intuitive is the 10-inch CNC touchscreen interface, and how fast can operators replace a bandsaw blade?
Answer: The interface is highly intuitive. Operators simply select pre-programmed material grades and enter desired cutting lengths and batch quantities. The hydraulic blade tensioning system maintains constant optimal tension, allowing trained operators to complete blade changes in 3 to 5 minutes.
Q8: What is the delivery lead time from Big Stone Taiwan, and how is international technical support handled?
Answer: Standard BS400S units manufactured at our Taiwan Hsinchu plant have an average lead time of 30 days. Big Stone provides dedicated real-time technical consultation (+886-3- 5931688 / info@bigstone.com.tw), prompt courier dispatch of spare parts, and on-site support through authorized distributor networks across the USA, Canada, Australia, UK, and South Africa.

BS400S Automatic Batch Cutting: 3-Step Operational Workflow

Standard operating procedure for CNC touchscreen recipe setup, servo ball screw material indexing, and dual servo continuous slicing:

  1. Step 1 – Select Material Recipe & Input Cutting Length and Batch Quantity

    On the 10-inch CNC touchscreen, select the target alloy grade (e.g., SUS304, tool steel, or titanium) and input target cut length and quantity. The system automatically configures optimal blade speed and servo downfeed rate.

  2. Step 2 – Load Raw Bar & Activate AC Servo Ball Screw Infeed Indexing

    Place the raw bar on the infeed bed. The AC servo ball screw carriage advances the workpiece to the exact length (single stroke 600 mm / 23. 6"), the 1.5 kW hydraulic vise clamps securely, and the guide arm automatically positions.

  3. Step 3 – Execute AC Servo Ball Screw Downfeed & Automatic Slicing Cycle

    Press cycle start. The AC servo downfeed drives the blade frame smoothly through the cut. Upon cut completion, the saw head elevates, discharges the piece, and the servo feeder advances the next cycle until the 25 mm remnant limit.

Why Precision Machine Shops Invest in BS400S: Core High ROI Benefits

⚡ Dual Servo Ball Screw System

Both downfeed and infeed indexing are powered by AC servo ball screws, eliminating hydraulic thermal drift and extending carbide blade life by 25%–40%.

💰 25 mm Ultra-Short Remnant (-68%)

Compared to industry average 80 mm remnant scrap, save 55 mm of material per raw bar. Delivers full machine ROI payback within 6 to 9 months.

🌐 Turnkey Automation & Offline CNC

10-inch touchscreen stores multi-step cutting programs and connects seamlessly with motorized roller tables for lights-out automated operation.

Need a Live Material Test Cut or Full PDF Technical Catalog?

Big Stone Taiwan Headquarters offers live sample trial cuts and dedicated real-time technical consultation.

BS400S Search Keywords & Industrial Applications

Semiconductor Vacuum Chamber Machining Precision CNC Machining Job Shops SUS304 / SUS316L Stainless Steel Slicing Aerospace Titanium & Superalloy Saws All-Servo Ball Screw Horizontal Bandsaw 25mm Short Remnant Metal Bandsaw CE Certified Fully Enclosed Band Saw Taiwan Bandsaw Manufacturer
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Trade Information
  • Country of Origin : Taiwan
  • Main Export Markets : all over the world
  • Payment Details :
  • Payment Terms : T/T
  • Minimum Order : 1 Units
    Order Quantity Limit : 1 Units
  • Others : bandsaw machine
  • Delivery Details :
  • Lead Time : 60 Days
  • FOB Port : TWKEE

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What Machining Challenges Does the Bigstone BS400S CNC All-Servo Bandsaw Solve? The Big Stone BS400S is a high-precision ...
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