NEW SMTCL VTC350140 Series Large CNC Vertical Lathe

NEW SMTCL VTC350140 Series Large CNC Vertical Lathe

The SMTCL VTC350140 is a large high-efficiency CNC vertical lathe designed for very large disc-type, ring-type, flange-type and other heavy rotary components.

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

• VTC350140 H turning configuration

• VTC350140 Hm turn-milling configuration

The VTC350140 is designed for applications requiring:

• Very large workpiece capacity

• High structural rigidity

• High workbench torque

• Stable heavy-duty turning

• High machining accuracy

• High production efficiency

• Optional integrated turn-milling capability

Typical workpieces may include:

• Large rings

• Large flanges

• Large bearing rings

• Large discs

• Covers

• Energy-sector components

• Heavy rotary housings

• Large industrial rotary components


VTC350140 Key Turning Specifications

Worktable and Capacity

• Workbench diameter: Ø3500 mm

• Maximum rotary diameter: Ø4000 mm

• Maximum turning diameter: Ø3800 mm

• Maximum workpiece height: 2000 mm

• Maximum workbench speed: 60 rpm

• Maximum workbench torque: approximately 82,600 Nm


Main Drive

• Rated main motor power: 81 kW


Ram and Beam

• Ram cross section: 280 × 280 mm

• Beam lifting movement: approximately 1800 mm


Axis Travel

• X-axis travel: -50 to +2100 mm

• Z-axis travel: 1400 mm


Axis Speed

• X-axis rapid traverse: 8 m/min

• Z-axis rapid traverse: 8 m/min


Turning Tool

• Turning tool shank: 40 × 40 mm


Machine Weight

• Approximate machine weight: 97,000 kg


VTC350140 Hm Turn-Milling Configuration

The Hm version extends the machine from large vertical turning into an integrated turning and milling platform.

Representative Hm specifications include:

• Workbench diameter: Ø3500 mm

• Maximum rotary diameter: Ø4000 mm

• Maximum turning diameter: Ø3800 mm

• Maximum workpiece height: 2000 mm

• Maximum workbench speed: 60 rpm

• Maximum workbench torque: approximately 82,600 Nm

• Rated turning motor power: 81 kW

• Milling spindle motor power: 29 kW

• Maximum milling spindle speed: 1800 rpm

• Maximum milling spindle torque: 1000 Nm

• C-axis speed range: 0.01–4 rpm

• Ram cross section: 280 × 280 mm

• Beam lifting movement: approximately 1800 mm

• Z-axis travel: 1400 mm

• Tool magazine capacity: 12 tools

• Approximate machine weight: 98,500 kg


Why Turn-Milling Matters on a Machine This Size

On components approaching 4 metres in diameter, moving the workpiece between separate turning and milling machines can become a major part of the manufacturing process.

The Hm configuration can allow selected turning, milling, drilling and tapping operations to be completed in one setup.

Potential benefits include:

• Reduced crane movements

• Reduced re-clamping

• Reduced datum transfer

• Lower setup time

• Improved positional consistency between turning and milling features

• Reduced work-in-process time

• More complete machining in one machine


Typical Hm operations may include:

• Turning

• Facing

• Internal turning

• External turning

• Grooving

• Face milling

• Drilling

• Tapping

• Bolt-circle machining

• Indexed milling

• C-axis positioning


VTC-H(m) Series Positioning

The VTC-H(m) Series is designed around:

• High rigidity

• High stability

• High machining accuracy

• High production efficiency

• Modular turning and turn-milling capability

The larger models including VTC200140, VTC250140, VTC350140 and VTC500160 belong to this high-efficiency H(m) platform.


High-Rigidity Casting Structure

Major machine components use heavy box-type cast-iron construction.

The manufacturer highlights:

• Thick-wall structure

• Reinforced internal ribbing

• Low centre-of-gravity design

• Thermal treatment for internal stress relief

• Precision scraping of important mating surfaces

These features are intended to improve:

• Structural rigidity

• Vibration resistance

• Heavy-cutting stability

• Long-term accuracy retention


High-Rigidity Hard Guideways

The principal feed axes use high-rigidity hard-guideway construction.

The guideways are designed for:

• High load capacity

• Strong resistance to cutting force

• Stable heavy-duty machining

• Good long-term accuracy retention


This guideway architecture is particularly appropriate for large vertical turning applications.


Forged-Steel Ram

The VTC350140 uses a:

• 280 × 280 mm forged-steel ram

The ram surfaces are hardened and the mating guideway surfaces are precision fitted.

Benefits include:

• High radial rigidity

• Strong torsional resistance

• Stable deep machining

• Good heavy-cutting support


High-Rigidity Main Machine Structure

The column, beam and ram-support structure are designed to resist deformation under large cutting loads.

The manufacturer highlights:

• Increased guideway span

• Reinforced beam structure

• Stronger column section

• Improved resistance to ram overhang forces

These characteristics are important when machining components up to 3800 mm in turning diameter.


Symmetrical Thermal Layout

The machine base and column use a left-right symmetrical structural concept.

This helps improve:

• Thermal balance

• Geometric stability

• Control of thermal deformation during long machining cycles


Crossed-Roller Worktable Bearing

The worktable uses a large high-accuracy crossed-roller bearing arrangement.

This helps support:

• Axial load

• Radial load

• Heavy workpieces

• Large cutting torque

• Stable worktable rotation


High-Torque Worktable Drive

The VTC350140 provides approximately:

• 82,600 Nm maximum workbench torque

This allows the machine to handle:

• Large rotating masses

• Large-diameter turning

• Heavy cutting

• Low-speed high-load machining


High-Accuracy Main Transmission

The worktable drive uses a geared transmission concept.

This supports:

• High torque transmission

• Stable speed regulation

• Accurate positioning

• C-axis functionality on Hm machines

• Turn-milling integration


Double-Motor Worktable Drive

The larger VTC-H(m) platform uses dual main motors under CNC synchronous control.

This helps provide:

• Stable table rotation

• High torque output

• Improved indexing control

• Better C-axis anti-backlash performance

• Stable surface quality


Beam Lifting System

The beam can be repositioned according to workpiece height.

VTC350140 provides approximately:

• 1800 mm beam lifting movement

After adjustment, the beam is hydraulically clamped.

This allows the machine to maintain a more suitable ram position for different workpiece heights.

Benefits include:

• Reduced unnecessary ram extension

• Improved cutting rigidity

• Better support for different workpiece heights


Turn-Milling Modularisation

The VTC-H(m) Series uses a modular machine concept.

The machine can be configured with:

• Turning ram

or

• Turn-milling ram

This allows the machine specification to be matched to the actual process requirement.


H Turning Configuration

Best suited where:

• Turning is the dominant process

• Large rings and flanges are common

• Milling is not required

• A simpler machine configuration is preferred


Hm Turn-Milling Configuration

Best suited where:

• Turning and milling are both required

• Bolt-circle features need machining

• Face holes or cross holes are required

• C-axis positioning is beneficial

• Large workpieces are difficult to move between machines

• Complete machining in one setup provides a production advantage


12-Tool Automatic Tool Magazine

The Hm configuration includes:

• 12-tool magazine

This supports automatic tool changes for processes such as:

• Milling

• Drilling

• Tapping

• Boring

• Selected auxiliary machining operations


Typical Turning Operations

The VTC350140 H can support:

• External turning

• Internal turning

• Facing

• Grooving

• Large-bore machining

• Profile turning

• Ring machining

• Flange machining


Additional Hm Operations

The Hm configuration can add:

• Face milling

• Drilling

• Tapping

• Indexed milling

• Hole-circle machining

• C-axis positioning

• Multi-process machining


Typical Industries

The VTC-H Series manufacturer material identifies applications including:

• Wind power

• New energy

• Bearing manufacturing

• Heavy engineering

• Large industrial machinery


For the VTC350140 size class, typical workpieces may include:

• Large bearing rings

• Large flanges

• Large annular components

• Large energy-sector components

• Heavy covers

• Large rotary housings

• Large industrial discs


Why Consider the VTC350140?

The VTC350140 is a strong choice where a customer needs significantly more capacity than the VTC250140 but does not require the 5-metre-class VTC500160.

Key reasons to consider the VTC350140 include:

• Ø3500 mm workbench

• Ø4000 mm maximum rotary diameter

• Ø3800 mm maximum turning diameter

• 2000 mm maximum workpiece height

• Approximately 82,600 Nm maximum workbench torque

• 60 rpm maximum workbench speed

• 81 kW main motor

• 280 × 280 mm forged-steel ram

• Approximately 1800 mm beam lifting movement

• 1400 mm Z-axis travel

• Approx. 97 tonne turning-machine weight

• High-rigidity hard-guideway structure

• Crossed-roller worktable bearing

• Double-motor worktable drive

• High-accuracy geared transmission

• Hm turn-milling configuration available

• 29 kW milling spindle

• 1800 rpm milling spindle

• 1000 Nm milling torque

• C-axis 0.01–4 rpm

• 12-tool automatic tool magazine


VTC350140 Compared with VTC250140

VTC250140

• Workbench: Ø2500 mm

• Maximum rotary diameter: Ø3000 mm

• Maximum turning diameter: Ø2800 mm

• Maximum workpiece height: 1600 mm

• Maximum workbench speed: 120 rpm

• Main motor: 51 kW

• Ram: 280 × 280 mm

• Beam lifting movement: approximately 1400 mm

• Z-axis travel: 1400 mm

• Machine weight: approximately 60,500 kg


VTC350140

• Workbench: Ø3500 mm

• Maximum rotary diameter: Ø4000 mm

• Maximum turning diameter: Ø3800 mm

• Maximum workpiece height: 2000 mm

• Maximum workbench speed: 60 rpm

• Main motor: 81 kW

• Ram: 280 × 280 mm

• Beam lifting movement: approximately 1800 mm

• Z-axis travel: 1400 mm

• Machine weight: approximately 97,000 kg


The move from VTC250140 to VTC350140 therefore provides:

• 1000 mm larger workbench diameter

• 1000 mm greater maximum turning diameter

• 400 mm additional workpiece height

• Higher main motor power

• Much greater machine structural mass


Choose VTC250140 where:

• 2800 mm turning capacity is sufficient

• 1600 mm workpiece height is adequate

• Higher workbench speed is useful


Choose VTC350140 where:

• Workpieces extend toward 3800 mm turning diameter

• Workpiece height approaches 2000 mm

• Higher cutting power is required

• A substantially larger and heavier machine structure is justified


VTC350140 Compared with VTC500160

VTC350140

• Workbench: Ø3500 mm

• Maximum turning diameter: Ø3800 mm

• Maximum workpiece height: 2000 mm

• Workbench torque: approximately 82,600 Nm

• Maximum speed: 60 rpm

• Main motor: 81 kW

• Ram: 280 × 280 mm

• Machine weight: approximately 97 tonnes


VTC500160

• Workbench: Ø4500 mm

• Maximum turning diameter: Ø5000 mm

• Maximum workpiece height: 3000 mm

• Workbench torque: approximately 125,000 Nm

• Maximum speed: 40 rpm

• Main motor: 81 kW

• Ram: 400 × 400 mm

• Machine weight: approximately 110 tonnes


The jump to VTC500160 is significant.

It adds:

• Approximately 1200 mm turning diameter

• 1000 mm workpiece height

• Much higher workbench torque

• Larger 400 × 400 mm ram

• Greater beam and Z-axis capacity


Choose VTC350140 where:

• 3800 mm turning diameter is sufficient

• 2000 mm workpiece height is adequate

• A more compact large vertical lathe is preferred


Choose VTC500160 where:

• Workpieces approach 5 metres in diameter

• 3000 mm workpiece height is required

• Substantially greater torque and ram rigidity are necessary


VTC350140 Hm Compared with VTC500160 Hm

VTC350140 Hm

• Milling motor: 29 kW

• Maximum milling speed: 1800 rpm

• Maximum milling torque: 1000 Nm

• C-axis: 0.01–4 rpm

• Tool magazine: 12 tools

• Approximate machine weight: 98,500 kg


VTC500160 Hm

• Milling motor: 51 kW

• Maximum milling speed: 1500 rpm

• Maximum milling torque: 2400 Nm

• C-axis: 0.01–4 rpm

• Tool magazine: 12 tools

• Approximate machine weight: 120,000 kg


The VTC500160 Hm is therefore a substantially stronger turn-milling platform.

Choose VTC350140 Hm where:

• 1000 Nm milling torque is sufficient

• Workpiece size remains within the 350140 envelope


Choose VTC500160 Hm where:

• Heavier milling is required

• Large cutter loads are expected

• Workpieces approach 5 metres in diameter


Large VTC-H(m) Selection Guide

VTC200140

• Workbench: Ø2000 mm

• Maximum turning diameter: Ø2300 mm

• Maximum workpiece height: 1600 mm


Best suited for:

• Large discs

• Large rings

• Medium-large industrial rotary components


VTC250140

• Workbench: Ø2500 mm

• Maximum turning diameter: Ø2800 mm

• Maximum workpiece height: 1600 mm


Best suited for:

• Larger rings

• Large flanges

• Bearing components


VTC350140

• Workbench: Ø3500 mm

• Maximum turning diameter: Ø3800 mm

• Maximum workpiece height: 2000 mm


Best suited for:

• Very large rings

• Large flanges

• Large energy-sector components

• Heavy industrial rotary parts


VTC500160

• Workbench: Ø4500 mm

• Maximum turning diameter: Ø5000 mm

• Maximum workpiece height: 3000 mm


Best suited for:

• Ultra-large rotary components

• Very large rings and flanges

• Large energy and heavy-industry components


Machine Selection and Configuration

The correct VTC350140 configuration should be selected according to the actual component and manufacturing process.

Please provide:

• Maximum raw workpiece diameter

• Maximum finished turning diameter

• Maximum workpiece height

• Maximum workpiece weight

• Workpiece material

• Drawing or 3D model

• External turning requirements

• Internal turning requirements

• Bore size and depth

• Facing requirements

• Grooving requirements

• Milling requirements

• Drilling requirements

• Tapping requirements

• C-axis requirements

• Required tolerances

• Surface finish requirements

• Production quantity

• Workholding concept

• Loading and crane arrangement

• Tooling requirements

• Tool magazine requirement

• Workpiece measurement requirement

• Tool measurement requirement

• Coolant requirement

• Chip-management requirement

• Foundation information

• Available installation space

• Electrical supply

MachineryPLUS can assist with reviewing the complete machining requirement before the final machine configuration is selected.


Configuration Before Quotation

The following should be confirmed before final quotation:

• VTC350140 H turning or Hm turn-milling configuration

• CNC system

• Worktable / clamping arrangement

• Turning tooling

• Milling tooling where required

• C-axis requirement

• Tool magazine

• Measurement system

• Workpiece probing

• Tool measurement

• Coolant system

• Chip-removal system

• Guarding

• Mist collection

• Foundation design

• Installation requirements

• Site electrical requirements

• Operator and maintenance training

Final technical specifications depend on the ordered configuration.


Complete Your Machine Setup

MachineryPLUS can also assist with:

• Large CNC vertical lathe selection

• Heavy-duty turning tools

• Grooving tools

• Large 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

• Workpiece handling

• 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.

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• 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.

Based in Perth, Western Australia, MachineryPLUS supports customers locally and Australia-wide with product selection, sourcing and practical manufacturing solutions.

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