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China Extra-Large Mold CNC Mill Tongtai VC-711: High-Load Oil-Air Spindle Suppliers, Manufacturer

The Tongtai VC-711 is a vertical machining center for super-large mold processing in the tooling industry, featuring highly dynamic rigidity, oil-air lubrication spindle (low heat, long life), BBT-40 dual contact tool holder, and triple-axis extended travel—paired with 1000 kg high load capacity, it’s ideal for one-time machining of oversized, heavy molds.

Product Description

Product Focus

The VC-711 targets ultra-big mold pain points: heavy workpiece clamping, 3D full-contour machining, and long-run stability—needs general vertical CNC machines or smaller mold mills can’t address.

Extra-Large High-Load Worktable

Its 1200×710 mm worktable (1000 kg max load) fits super-large molds like automotive chassis molds or industrial equipment shell molds (e.g., 1.2m-wide excavator cab molds). This design ensures stable clamping without table deformation—critical for maintaining accuracy of heavy mold bases.

Triple-Axis Extended Travel

X/Y/Z travel of 1100/710/710 mm covers 3D full contours of deep, wide molds. It avoids "layered machining" gaps common in milling centers with shorter Z-axis travel, ensuring smooth integration of mold cavities and ribs.

Oil-Air Spindle for Heavy Mold Long Runs

The oil-air spindle reduces friction heat, keeping rotation stable even when cutting thick mold steel—preventing thermal expansion that warps large mold dimensions. Its 12000–20000 rpm speed and 40 kW max motor power handle roughing and finishing precision surfaces.

BBT-40 Tool Holder for Big Mold Details

The BBT-40 dual contact system (taper + face) eliminates tool runout, ensuring consistent cutting depth—outperforming standard BT-40 holders in CNC turning centers that fail to stabilize tools for super-large workpiece machining.

Core Value & Applications
  • Heavy Mold Compatibility: 1000 kg load handles overweight molds, no need for split clamping.
  • 3D Full-Contour Machining: Triple-axis travel covers deep/wide molds, reducing rework.
  • Long-Run Stability: Oil-air spindle and rigidity ensure accuracy for high-value super-large molds.

Typical uses: Automotive chassis/frame molds, industrial equipment shell molds, and large-scale injection molds.

Product Specifications
SpecificationVC-711
Table size(LxW)1200x710 mm
Max. loading capacity1000 kg
X/Y/Z axis travel1100/710/710 mm
X/Y/Z axis rapid traverse24/24/24 m/min
Spindle taper7/24 Taper No.40
Spindle speed12000 (10000/15000/20000) rpm
Spindle motor11/7.5 to 40/30 kW (various options)
Tool capacity24 (30) pc
Product Video
FAQ
1. What is the maximum workpiece weight the VC-711 can handle?
The VC-711 is equipped with an extra-large high-load worktable that can support a maximum loading capacity of 1000 kg, making it ideal for heavy automotive and industrial molds.
2. How does the travel range compare to other models?
The VC-711 offers an extended X/Y/Z travel of 1100/710/710 mm. Specifically, the Y and Z axes are 100 mm longer than the VC-610, allowing for better coverage of deep and wide 3D contours.
3. What are the benefits of the oil-air spindle for long-duration machining?
Large molds often require 12+ hours of continuous cutting. The oil-air spindle reduces friction heat and prevents thermal expansion, ensuring that the machine maintains accuracy throughout long production runs.
4. Why is the BBT-40 tool holder used instead of a standard BT-40?
The BBT-40 features a dual contact system (taper and face) which eliminates tool runout and provides superior stability, resulting in more consistent cutting depths for intricate mold details.
5. What industries typically use the VC-711 solutions?
It is widely used for manufacturing automotive chassis molds, industrial equipment shells (like excavator cabs), and large-scale injection molds that require high precision and heavy load capacity.
6. What spindle speeds are available for this machining center?
The VC-711 supports a standard speed of 12000 rpm, with optional configurations available for 10000 rpm, 15000 rpm, and up to 20000 rpm to suit different material requirements.

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