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φ3000mm Max Swing · φ2500mm Max Swing Over Tool · 3T Max Weight · 750mm Max Length

The TK6920A is a high-capacity CNC floor boring and milling machine, designed for large-scale turning, facing, and grooving applications. Built with a rigid three-support spindle, this model delivers excellent vibration resistance and cutting stability during both rough and finish machining.

TK Series

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Regular maintenance

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Spare parts supply

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On-site installation service

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Customized design

Why Choose Our CNC Solutions

Key Features

  • ● Wide swing diameter support up to 3000mm for oversized parts
  • ● Three-point spindle support for high rigidity and precision during deep cuts
  • ● Suitable for both roughing and precision finishing operations
  • ● Forced lubrication system reduces thermal wear and improves service life
  • ● Efficient chip evacuation design improves workflow and reduces downtime
  • ● CNC programmable for complex paths and multi-surface operations
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Recommended Configurations

  • Auto tool turret: Enables quick change between roughing and finishing tools.
  • Hydraulic steady rest: Stabilizes long or heavy cylindrical parts during cutting.
  • Programmable tailstock: Provides additional support for shaft-type components.
  • High-torque spindle motor: Delivers constant power at low speeds for heavy cuts.
  • Heavy-duty chip conveyor: Optimizes chip flow and machine cleanliness.
  • Operator protection enclosure: Ensures safety during large-part operation.
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Application Case

  • Client: Wind Turbine Hub Manufacturer – Spain.
  • Use Case: Boring and facing large-diameter cast steel hubs for wind turbine rotors.
  • Setup: TK6920A equipped with hydraulic tailstock, chip conveyor, and enhanced coolant system.
  • Results: Dimensional tolerance: ±0.02 mm across 2.4 m diameter, operation time: 12+ hours continuous machining per setup, tool change efficiency improved by 40%, client feedback: “We needed a machine that could handle big, heavy castings with repeatable precision — the TK6920A exceeded expectations in both speed and finish.”
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Product Specifications

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Frequently Asked Questions

Our floor borers can achieve positioning accuracy within ±0.01–0.02 mm and repeatability within ±0.008 mm, with surface roughness reaching Ra 0.8–1.6 μm, depending on the cutting system and tooling.

Yes! We offer customizations like column travel length, spindle diameter and power, worktable size, automatic tool changers (ATC), rotary tables, and integration with automation lines.

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