NEW SMTCL VTC250140 Series Large CNC Vertical Lathe

NEW SMTCL VTC250140 Series Large CNC Vertical Lathe

The SMTCL VTC250140 is a large high-efficiency CNC vertical lathe designed for heavy disc-type, ring-type, flange-type and other large rotary components.

The machine belongs to SMTCL’s VTC-H(m) high-efficiency vertical lathe family and is available in:

• VTC250140 H turning configuration

• VTC250140M / Hm turn-milling configuration

The VTC250140 is designed for customers requiring:

• Large workpiece capacity

• High structural rigidity

• Stable heavy-duty turning

• High machining accuracy

• High production efficiency

• Large-diameter ring and flange machining

• Optional integrated turn-milling capability


VTC250140 Key Turning Specifications

• Workbench diameter: 2500 mm

• Maximum rotary diameter: 3000 mm

• Maximum turning diameter: 2800 mm

• Maximum workpiece height: 1600 mm

• Maximum workbench speed: 120 rpm

• Main motor rated power: 51 kW

• Ram cross section: 280 × 280 mm

• Beam lifting movement: 1400 mm

• X-axis travel: -50 to +1600 mm

• Z-axis travel: 1400 mm

• X-axis rapid traverse: 10 m/min

• Z-axis rapid traverse: 8 m/min

• Turning tool shank: 40 × 40 mm

• Approximate machine weight: 60,500 kg


VTC250140 Hm Turn-Milling Configuration

For customers requiring milling and indexing capability in addition to turning, the VTC250140 can be configured as a turn-milling machine.

Representative Hm specifications include:

• Turning main motor rated power: 51 kW

• Milling spindle motor rated power: 29 kW

• Maximum milling spindle speed: 1800 rpm

• Maximum milling spindle torque: 1000 Nm

• C-axis speed range: 0.01–5 rpm

• Tool magazine capacity: 12 tools

• X-axis travel: -900 to +1600 mm

• Z-axis travel: 1400 mm

• Approximate machine weight: 61,500 kg


The Hm configuration can reduce the need to move large workpieces between separate turning and milling machines.


High-Efficiency VTC-H(m) Series

The VTC250140 belongs to SMTCL’s high-efficiency VTC-H(m) Series.

The manufacturer positions this family around:

• High rigidity

• High stability

• High machining accuracy

• High production efficiency

• Modular turn-milling capability


The Series is particularly suited to high-value large components where machine stability and machining consistency are important.


High-Rigidity Casting Structure

Major cast structures use box-type cast-iron construction.

The manufacturer highlights:

• Thick-wall structure

• Reinforced ribbing

• Low centre of gravity

• Thermal treatment for internal stress relief

• Special scraping of important joint surfaces


These features are intended to improve:

• Vibration resistance

• Structural rigidity

• Heavy-cutting stability

• Long-term accuracy retention


High-Rigidity Hard Guideways

The two main feed axes use high-rigidity hard-guideway construction.

The guide surfaces are professionally treated and fitted with low-friction wear plates.

This provides:

• Strong rigidity

• Good accuracy retention

• Stable heavy-load cutting

• High resistance to cutting forces


The manufacturer specifically positions this guideway concept for heavy cutting.


Forged-Steel Ram

The VTC Series uses a forged-steel ram.

The ram surface is hardened and its guideway mating surfaces are precision scraped.

The manufacturer states that the ram cross section was increased substantially compared with the previous generation.

On the VTC250140:

• Ram cross section: 280 × 280 mm


This contributes to:

• Strong radial rigidity

• Stable deep machining

• Improved resistance to cutting torque

• Better heavy-duty turning stability


High-Rigidity Main Machine Structure

The beam, column and ram support system are designed to resist deformation under cutting load.

The manufacturer highlights:

• Increased guideway span

• Increased column thickness

• Reinforced beam structure

• Improved ram leverage resistance


This is particularly important on a machine with up to 2800 mm turning diameter.


Symmetrical Thermal Design

The base and column are designed using a left-right symmetrical concept.

This helps reduce thermal imbalance and deformation during extended machining.

The structure also incorporates internal ribbing to increase stiffness and stability.


Crossed-Roller Worktable Bearing

The VTC Series uses a large-specification high-accuracy crossed-roller bearing for the worktable.

This bearing arrangement is designed to support:

• Axial load

• Radial load

• High workpiece mass

• High-speed rotation

• Large cutting torque


The result is strong worktable support and stable rotational accuracy.


High-Accuracy Main Transmission

The manufacturer upgraded the main transmission from a simple belt system to a geared transmission concept.

This helps provide:

• High torque

• Accurate positioning

• Stable speed control

• Turn-milling compatibility

• Improved indexing capability


The spindle also incorporates constant-temperature cooling to reduce thermal influence.


Double-Motor Worktable Drive

The worktable main drive uses two main motors operating under CNC synchronous control.

This arrangement helps provide:

• Stable table rotation

• Improved indexing accuracy

• High torque capability

• C-axis anti-backlash control

• Better surface-quality consistency


This is particularly valuable on larger VTC machines.


Beam Double-Drive Lifting

The beam can be configured with a double-drive lifting system.

This allows the beam position to be adjusted according to workpiece height.

After positioning, hydraulic clamping secures the beam.

Benefits include:

• Better ram support

• Reduced unnecessary ram extension

• Improved rigidity

• Better matching to different workpiece heights


On the VTC250140, beam lifting movement is approximately:

• 1400 mm


Automatic Tool Change

The VTC platform supports automatic tool changing.

On the Hm turn-milling configuration, the VTC250140 uses:

• 12-tool magazine

This helps reduce auxiliary machining time and supports more complete machining in one setup.


Turn-Milling Modularisation

A major design feature of the VTC-H(m) platform is its modular turn-milling structure.

The machine slide is designed to support both:

• Turning ram

and

• Turn-milling ram

This modular architecture allows different configurations to be selected according to the application.


H Turning Configuration

Best suited where:

• Turning is the main process

• Large rings and flanges dominate

• Milling is not required

• Simpler tooling and machine configuration is preferred


Hm Turn-Milling Configuration

Best suited where:

• Turning and milling are both required

• Bolt circles or face features need machining

• Cross holes are required

• Indexed milling is required

• Large workpieces are difficult or expensive to re-clamp

• Complete machining in one setup is valuable


Typical Machining Operations

VTC250140 H Turning

• External turning

• Internal turning

• Facing

• Grooving

• Bore machining

• Profile turning

• Ring machining

• Flange machining


VTC250140 Hm Turn-Milling

Adds operations such as:

• Face milling

• Drilling

• Tapping

• Indexed milling

• Hole-circle machining

• C-axis positioning

• Multi-process machining


Typical Industries

The VTC-H Series is used across applications including:

• Wind power

• New energy

• Automotive

• Bearing manufacturing

• General heavy engineering

• Large industrial machinery


For VTC250140-size workpieces, likely applications include:

• Large bearings

• Large flanges

• Ring components

• Heavy covers

• Large housings

• Energy-sector components

• Large rotary equipment components


Typical Workpieces

The VTC250140 is particularly suitable for:

• Large rings

• Large flanges

• Bearing rings

• Covers

• Large discs

• Large annular components

• Large pump-related components

• Large rotary housings

• Heavy industrial components


Why Consider the VTC250140?

The VTC250140 is a strong choice where customers need substantially greater capacity than the VTC200140 but do not require the larger VTC350140 platform.

Key reasons to consider the VTC250140 include:

• 2500 mm workbench

• 3000 mm maximum rotary diameter

• 2800 mm maximum turning diameter

• 1600 mm maximum workpiece height

• 120 rpm maximum workbench speed

• 51 kW main motor

• 280 × 280 mm ram

• 1400 mm beam lifting movement

• 1400 mm Z-axis travel

• 10 / 8 m/min X/Z rapid traverse

• Approx. 60.5 tonne machine mass

• High-rigidity hard-guideway structure

• Symmetrical thermal design

• Crossed-roller worktable bearing

• Double-motor worktable drive

• High-accuracy transmission

• Optional turn-milling configuration

• 29 kW / 1800 rpm / 1000 Nm milling spindle on Hm

• C-axis machining

• 12-tool magazine


VTC250140 Compared with VTC200140

VTC200140

• Workbench: 2000 mm

• Maximum rotary diameter: 2500 mm

• Maximum turning diameter: 2300 mm

• Maximum workpiece height: 1600 mm

• Maximum workbench speed: 150 rpm

• Main motor: 51 kW

• X travel: -50 to +1400 mm

• Z travel: 1400 mm

• Machine weight: approximately 45,000 kg


VTC250140

• Workbench: 2500 mm

• Maximum rotary diameter: 3000 mm

• Maximum turning diameter: 2800 mm

• Maximum workpiece height: 1600 mm

• Maximum workbench speed: 120 rpm

• Main motor: 51 kW

• X travel: -50 to +1600 mm

• Z travel: 1400 mm

• Machine weight: approximately 60,500 kg


The move from VTC200140 to VTC250140 is therefore mainly driven by:

• Larger workpiece diameter

• Larger worktable

• Greater radial machining capacity

• Heavier machine structure


Both retain the same 1600 mm workpiece-height class and 51 kW turning motor.


Choose VTC200140 where:

• Workpieces remain within approximately 2300 mm turning diameter

• Smaller machine size is preferred


Choose VTC250140 where:

• Components extend toward 2800 mm turning diameter

• A 2500 mm worktable provides a better support and clamping platform

• Greater structural mass is beneficial


VTC250140 Compared with VTC350140

VTC250140

• Workbench: 2500 mm

• Maximum rotary diameter: 3000 mm

• Maximum turning diameter: 2800 mm

• Maximum workpiece height: 1600 mm

• Maximum speed: 120 rpm

• Main motor: 51 kW

• Machine weight: approximately 60.5 tonnes


VTC350140

• Workbench: 3500 mm

• Maximum rotary diameter: 4000 mm

• Maximum turning diameter: 3800 mm

• Maximum workpiece height: 2000 mm

• Maximum speed: 60 rpm

• Main motor: 81 kW

• Machine weight: approximately 97 tonnes


Choose VTC250140 where:

• 2800 mm turning capacity is sufficient

• Higher table speed is useful

• The 51 kW platform meets the cutting requirement


Choose VTC350140 where:

• Workpiece diameter approaches 3800 mm

• Workpiece height exceeds the VTC250140 envelope

• Higher spindle power and substantially larger machine structure are required


VTC-H(m) Large Vertical Lathe Selection Guide

VTC200140

Best suited for:

• Large disc and ring components

• Up to approximately 2300 mm turning diameter


VTC250140

Best suited for:

• Larger rings and flanges

• Up to approximately 2800 mm turning diameter


VTC350140

Best suited for:

• Very large components

• Up to approximately 3800 mm turning diameter


VTC500160

Best suited for:

• Ultra-large rotary components

• Up to approximately 5000 mm turning diameter


The correct machine should be selected according to:

• Workpiece diameter

• Workpiece height

• Workpiece mass

• Required spindle power

• Required machining processes

• Turning-only or turn-milling requirement


Machine Selection and Configuration

The correct VTC250140 configuration should be selected according to the actual component and process.

Please provide:

• Maximum workpiece diameter

• Maximum workpiece height

• Maximum workpiece weight

• Workpiece material

• Drawing or 3D model

• Required turning diameter

• Internal boring requirements

• Facing requirements

• Grooving requirements

• Milling requirements

• Drilling requirements

• Tapping requirements

• C-axis requirements

• Required tolerances

• Surface finish requirements

• Production quantity

• Workholding requirements

• Tooling requirements

• Tool magazine requirement

• CNC control preference

• Workpiece measurement requirement

• Tool measurement requirement

• Coolant requirement

• Chip-management requirement

MachineryPLUS can assist with selecting the appropriate H turning or Hm turn-milling configuration according to the actual workpiece and production process.


Configuration Before Quotation

The following should be confirmed before final quotation:

• VTC250140 H or VTC250140M / Hm

• CNC system

• Manual or alternative chuck / workholding arrangement

• Turning tooling

• Milling tooling if required

• C-axis requirement

• Tool magazine

• Linear scales

• Workpiece probing

• Tool measurement

• Coolant system

• High-pressure coolant if required

• Chip-removal system

• Guarding

• Oil mist collection

• Foundation

• Installation requirements

• Site electrical requirements

Final technical parameters depend on the selected configuration.

Manufacturer catalogue parameters are subject to change with continued product development.


Complete Your Machine Setup

MachineryPLUS can also assist with:

• Large CNC vertical lathe selection

• Turning tools

• Grooving tools

• Boring bars

• Large-diameter face mills

• Milling cutters

• Indexable drills

• Threading tools

• Tool holders

• Large-component workholding

• Custom fixtures

• Workpiece measurement

• Tool measurement

• Coolant systems

• Chip management

• Tool management

• Automation

• Integrated manufacturing solutions


Explore More from MachineryPLUS

MachineryPLUS supplies machine tools, manufacturing solutions, cutting tools, workholding and supporting equipment for Australian manufacturing, machining and engineering businesses.

Our broader machine tool and manufacturing solution range includes:

• CNC Turning – CNC lathes, horizontal turning centres, vertical lathes, heavy-duty lathes and turn-mill machining centres.

• Machining Centres – vertical machining centres, horizontal machining centres, five-axis machining centres and drilling and tapping centres.

• Five-Axis Machining – vertical five-axis machining centres, horizontal five-axis machining centres, five-axis gantry machines and specialised five-axis machining solutions.

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• Forming & Forging Equipment – hydraulic presses, mechanical presses, forging systems, forming equipment and specialised production systems.

• Automation & Smart Manufacturing – robotic automation, gantry automation, flexible manufacturing systems, machining cells, automated production lines and digital manufacturing solutions.

• Cutting Tools – turning, milling, drilling, threading and holemaking tools for a broad range of machining applications.

• Tool Holders – BT, CAT, HSK, PSC/Capto, Morse taper, R8 and other machine tool holder systems.

• Workholding – machine vises, chucking solutions, soft jaws, centres, fixtures and CNC workholding accessories.

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MachineryPLUS can support customers from individual machine selection through to tooling, workholding, automation and integrated manufacturing solutions.

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