NEW SMTCL PBC S Series CNC Horizontal Chain-Type Milling and Boring Machine

NEW SMTCL PBC S Series CNC Horizontal Chain-Type Milling and Boring Machine

The SMTCL PBC S Series is a high-accuracy CNC horizontal milling and boring machine platform designed for precision machining of medium and large box-type, housing-type and machine-base components.

The current Series is represented by the PBC130s, a 130 mm spindle machine combining high spindle speed, large table capacity, extended axis travel and high positioning accuracy.

The PBC130s is particularly suited to aerospace, mould and die, general machinery and other applications where precision hole and hole-system machining, stable positioning and high-quality multi-face machining are important.

Compared with the general-purpose PBC m platform, the PBC S Series places greater emphasis on:

• Higher spindle speed

• Higher positioning accuracy

• Faster axis movement

• High-accuracy rotary-table performance

• Full-axis measuring feedback

• Stable precision machining

The machine supports milling, precision boring, drilling, reaming and tapping operations and can be configured with tool magazines, accessory milling heads, spindle internal coolant, measurement systems and other options according to the application.


Available Model

• PBC130s


PBC130s Key Specifications

Worktable

• Standard worktable sizes:
1600 × 1800 mm
or
2000 × 2000 mm

• Maximum allowable table load: 15,000 kg


Spindle

• Spindle diameter: Ø130 mm

• Spindle speed range: 10–3500 rpm

• Tool interface: JT50 / BT50

• Main motor power: 25 / 30 kW

• Catalogue spindle torque: approximately 2100 / 2600 Nm

• 2026 product training lists maximum spindle torque at approximately 2593 Nm


Axis Travels

• X-axis travel:
2000 / 3000 / 4000 mm

• Y-axis travel:
1600 / 2000 / 2500 mm

• Z-axis travel:
1600 / 2000 mm

• W-axis boring-spindle travel:
800 mm


Feed Speed

• X / Y / Z feed speed:
1–15,000 mm/min

• W-axis feed speed:
1–10,000 mm/min

• B-axis rotary speed:
0–3 rpm


Rapid Traverse

• X / Y / Z rapid traverse:
15 m/min

• W-axis rapid traverse:
10 m/min

• B-axis:
up to approximately 3 rpm


Positioning Accuracy

The 2026 PBC-s product specification highlights:

• X-axis positioning accuracy:
approximately 0.012 mm

• Y-axis positioning accuracy:
approximately 0.01 mm

• Z-axis positioning accuracy:
approximately 0.01 mm

• W-axis positioning accuracy:
approximately 0.01 mm

• B-axis positioning accuracy:
approximately 4 arc-seconds


The 2024 technical catalogue also lists grating-scale-controlled axis accuracy around:

• X / Y / Z:
approximately 0.01 mm with grating scales

• W:
approximately 0.01 mm

• B:
approximately 4 arc-seconds


Repeat Positioning Accuracy

Representative catalogue values include:

• X / Y / Z:
approximately 0.008 mm

• W:
approximately 0.008 mm

• B:
approximately 2 arc-seconds

Final machine accuracy should be confirmed against the selected travel, rotary table and measuring-system configuration.


High-Accuracy PBC S Platform

The PBC S Series is specifically positioned for machining applications where precision is more important than simply maximum heavy-cutting capability.

The manufacturer identifies the Series as suitable for:

• Aerospace

• Mould and die

• General machinery

• Precision box-type components

• Precision housing components

• Machine-base components

• High-accuracy hole systems

The key product objectives are:

• High accuracy

• High rigidity

• High stability

• High dynamic performance

• Reliable precision retention


High-Speed 3500 rpm Spindle

One of the major differences between PBC130s and conventional large horizontal boring machines is spindle speed.

The PBC130s provides:

• Ø130 mm boring spindle

• Up to 3500 rpm

• 25 / 30 kW main motor

• Approximately 2600 Nm maximum spindle torque

This gives the machine a useful combination of:

• Boring capability

• Milling speed

• Precision finishing capability

• High-speed machining

• General-purpose flexibility

The 3500 rpm spindle makes the machine particularly suitable for applications where both precision boring and higher-speed milling are required.


High-Rigidity Mechanical Spindle

The PBC platform uses a high-rigidity mechanical spindle manufactured from high-quality alloy steel.

According to the manufacturer, the spindle group undergoes:

• Multiple heat-treatment processes

• Nitriding

• Precision grinding

• Precision polishing

These manufacturing processes are intended to improve:

• Spindle accuracy

• Surface hardness

• Wear resistance

• Structural rigidity

• Long-term machining stability


External Main Speed-Change Mechanism

The PBC S Series uses a high-speed spindle group with the main speed-change mechanism arranged externally.

The main transmission system uses separate cooling.

This arrangement is designed to improve:

• Thermal stability

• Spindle consistency

• Transmission reliability

• Long-term machining accuracy


Forced Oil Cooling

The headstock is equipped with an oil cooler as standard.

The forced cooling system helps control heat generated by:

• Spindle operation

• Gear transmission

• Continuous machining

The spindle can also be configured with temperature-compensation capability.

This helps reduce:

• Thermal elongation

• Thermal drift

• Long-cycle dimensional variation


High-Speed Feed System

The PBC130s provides up to:

• 15 m/min X-axis movement

• 15 m/min Y-axis movement

• 15 m/min Z-axis movement

This is a significant characteristic for a machine of this size.

Higher feed and rapid-traverse capability helps reduce non-cutting time during:

• Multi-hole machining

• Tool repositioning

• Multi-face machining

• Large mould machining

• Aerospace structural-component machining

• Repeated production cycles


Integrated Steel-Inserted Guideways

The PBC S platform uses an integrated steel-inserted guideway structure.

The 2026 product training specifically highlights:

• Integrated steel-inserted guideways on X / Y / Z axes

The guideway structure is precision ground and undergoes multiple heat-treatment processes.

Benefits include:

• High rigidity

• Good wear resistance

• Stable positioning

• Good repeat positioning

• Strong accuracy retention


High-Accuracy Rotary Worktable

The rotary worktable is one of the most important parts of a table-type horizontal boring and milling machine.

The PBC platform can be equipped with a high-accuracy rotary worktable.

The manufacturer identifies available worktable technologies including:

• Worm gear and worm transmission

• Static heavy-load worktable

• Double-motor driven high-accuracy worktable

The optional high-accuracy double-drive rotary table is designed to provide:

• Fast indexing

• High load capacity

• Strong rigidity

• Smooth movement

• High rotary positioning accuracy

The manufacturer states that positioning accuracy can be significantly improved compared with a conventional rotary-table arrangement.


15-Tonne Table Capacity

The PBC130s supports workpieces up to approximately:

• 15 tonnes

This capacity allows the machine to handle:

• Large moulds

• Aerospace structural components

• Large housings

• Gearboxes

• Machinery bases

• Heavy precision fixtures

• Large castings

The combination of high table load and precision rotary positioning is a key advantage for large multi-face components.


Precision Ballscrew System

The TK/PBC platform uses precision feed screws with pre-tensioning.

Pre-tensioning helps compensate for thermal deformation caused by ballscrew heating.

This supports:

• High transmission accuracy

• Stable axis movement

• Better repeatability

• Reduced thermal influence

• Long-term precision retention


Ballscrew Auxiliary Support

Long-travel ballscrews use auxiliary support structures.

This helps reduce:

• Ballscrew sagging

• Deflection

• Long-axis transmission error

• Dynamic instability

This is particularly important on the 3000 and 4000 mm X-axis configurations.


Full Measuring Feedback

The PBC130s standard specification lists:

• X/Y/Z-axis linear scales

• W-axis magnetic scale

• B-axis circular optical grating

This measuring arrangement provides direct position feedback and supports the high-accuracy positioning capability of the machine.


High Accuracy and High Rigidity

The TK/PBC manufacturer applies strict manufacturing and assembly control to the complete platform.

The manufacturer states that major machine accuracy requirements are internally controlled approximately 20% tighter than the referenced national standards.

Accuracy-related technologies include:

• Precision mechanical spindle

• Integrated steel-inserted guideways

• Ballscrew pre-tensioning

• Linear scales

• B-axis circular optical grating

• Headstock oil cooling

• High-accuracy rotary worktable

• Controlled assembly procedures


High-Quality Cast Structure

The main machine castings use high-strength cast iron and resin-sand moulding.

Key structural components include:

• Machine bed

• Column

• Worktable

• Headstock

Finite-element analysis is used to optimise:

• Internal rib arrangement

• Structural stiffness

• Stress distribution

• Load paths

• Machine stability

The castings undergo ageing treatment to improve long-term dimensional stability.


T-Shaped Table-Type Layout

The PBC130s uses a T-shaped machine layout with a single-column side-hanging headstock configuration.

This arrangement provides:

• Large worktable capacity

• Good access to box-type components

• Multi-face machining capability

• Stable B-axis rotary positioning

• Large X/Y/Z machining envelope

• Boring-spindle W-axis extension

The workpiece remains secured on the rotary worktable while the machine accesses different sides of the component.


Typical Machining Operations

The PBC130s can support:

• Precision boring

• Milling

• High-speed milling

• Drilling

• Reaming

• Tapping

• Hole-system machining

• Multi-face machining

• Large mould machining

• Precision housing machining


Precision Hole-System Machining

One of the main intended applications of the PBC S Series is machining precision holes and hole systems in:

• Box-type components

• Housings

• Machine bases

• Structural parts

The horizontal spindle and CNC rotary table allow several related holes and surfaces to be machined with fewer workpiece setups.

This can improve:

• Hole-to-hole positional accuracy

• Bore alignment

• Face-to-hole relationships

• Multi-face datum consistency


Typical Industries

The 2026 manufacturer product training identifies the PBC-s platform particularly for:

• Aerospace

• Mould and die

• General machinery

Additional applications may include:

• Precision engineering

• Gearbox manufacturing

• High-value industrial components

• Large precision fixtures


Typical Workpieces

Typical PBC130s workpieces may include:

• Aerospace landing-gear components

• Gearboxes

• Transmission housings

• Large moulds

• Precision machinery housings

• Machine bases

• Bearing housings

• Large fixture bodies

• Large box-type components

• High-accuracy structural components


Manufacturer-Documented Workpiece Examples

The 2026 product material specifically shows representative PBC-s applications including:

• Landing gear

• Gearbox

• Mould components

These examples reflect the machine’s emphasis on precision rather than only heavy material removal.


Why Consider the PBC S Series?

The PBC130s is particularly attractive where customers require the workpiece capacity of a large horizontal boring machine together with substantially higher precision and spindle speed.

Key reasons to consider the PBC S Series include:

• Ø130 mm spindle

• Up to 3500 rpm spindle speed

• Approximately 2600 Nm maximum spindle torque

• 25 / 30 kW spindle motor

• 15-tonne table capacity

• Worktable sizes up to 2000 × 2000 mm

• X-axis travel up to 4000 mm

• Y-axis travel up to 2500 mm

• Z-axis travel up to 2000 mm

• W-axis travel of 800 mm

• 15 m/min X/Y/Z axis capability

• Integrated steel-inserted guideways

• Full axis measurement feedback

• B-axis circular optical grating

• High-accuracy rotary worktable

• Headstock oil cooling

• Strong precision retention

• Suitable for aerospace and mould applications


PBC S Compared with PBC m

The PBC S and PBC m platforms serve different machining priorities.


PBC m – General-Purpose Platform

The PBC m Series is designed for:

• Engineering machinery

• General machinery

• Pump and valve components

• Gearbox and reducer components

• Broad general-purpose boring and milling

Key characteristics include:

• 110 or 130 mm spindle classes

• Up to approximately 3000 Nm torque

• 5 or 10-tonne table capacity

• Practical general-purpose configuration


PBC S – High-Accuracy Platform

The PBC S Series is designed for:

• Aerospace

• Mould and die

• Precision general machinery

• High-accuracy housings

• Precision hole-system machining

Key characteristics include:

• Ø130 mm spindle

• Up to 3500 rpm

• 15-tonne table capacity

• 15 m/min XYZ movement

• Higher positioning accuracy

• Integrated steel-inserted guideways

• Full measuring feedback


Choose PBC m when general-purpose machining flexibility and practical investment are the main priorities.

Choose PBC S when precision, positioning stability, spindle speed and high-value workpiece machining are more important.


PBC S Compared with PBC rp

PBC S

Best suited for:

• High-accuracy box-type components

• Precision hole systems

• Aerospace

• Moulds

• High-value precision work


PBC rp

Best suited where:

• Deep cavities are important

• Greater horizontal reach is required

• Ram-type machining provides a process advantage

• Large complex housings require additional reach


Choose PBC S where machining precision and rotary positioning are primary requirements.

Choose PBC rp where deep cavity access and ram reach are more important.


PBC S Compared with TK65

PBC S

Focus:

• High accuracy

• High spindle speed

• Stable precision

• Precision hole systems

• Aerospace and mould applications


TK65

Focus:

• High rigidity

• Strong cutting capability

• Heavy engineering

• Mining

• Power-industry components


Choose PBC S for precision-oriented work.

Choose TK65 where heavy cutting and larger cutting loads are the dominant requirement.


Horizontal Milling and Boring Selection Guide

SMTCL provides several horizontal milling and boring platforms for different machining requirements.


PBC m – General-Purpose

Designed for:

• General machinery

• Engineering machinery

• Pumps and valves

• Gearboxes

• General box-type components


PBC S – High-Accuracy

Designed for:

• Aerospace

• Moulds

• High-precision general machinery

• Precision holes and hole systems


PBC rp – Ram-Type

Designed for:

• Deep cavities

• Larger reach

• Complex housings

• Large industrial components


TK65 – Heavy-Cutting

Designed for:

• Heavy cutting

• High rigidity

• Large engineering components

• Mining

• Power-industry applications


Standard Configuration

The PBC130s catalogue lists typical standard equipment including:

• Siemens 828D CNC system

• Cooling and chip-removal system

• Centralised lubrication

• Headstock oil cooler

• Imported spindle bearings

• Spindle air-blow function

• Imported ballscrews

• B-axis circular optical grating

• Y-direction armour protection

• Worktable water tray

• Operator protection

• Water gun

• Air gun

• Foundation pads

• Working light

• Electrical cabinet air conditioner

• X/Y/Z-axis linear scales

• W-axis magnetic scale


Optional Configuration

Manufacturer-listed options include:

• 40-tool chain-type tool magazine

• 60-tool chain-type tool magazine

• Accessory milling heads

• Worktable-area protection

• Spindle internal coolant

• Pump-station oil cooler

• Adaptive control

• Tool-load abnormality detection

• Energy-saving package

• Siemens ONE CNC system

• FANUC 0i / 31i CNC system

Final compatibility should be confirmed for the selected machine configuration.


CNC Control Options

Standard catalogue control:

• Siemens 828D


Optional controls include:

• Siemens ONE

• FANUC 0i

• FANUC 31i

Final CNC selection should be matched to the customer’s programming, service and production requirements.


Tool Magazine Options

Available chain-type tool-magazine configurations include:

• 40 tools

• 60 tools

A larger tool magazine is particularly useful for:

• Aerospace components

• Mould machining

• Complex housings

• Components requiring many drilling, boring and milling tools


Accessory Milling Heads

Accessory milling heads can expand the machining capability of the PBC130s.

Depending on the selected head, additional processes may include:

• Angular milling

• Multi-face machining

• Additional drilling orientations

• Complex mould machining

• Large component machining from multiple directions

Final accessory-head type should be selected from the actual workpiece drawing.


Machine Selection and Configuration

The correct PBC130s configuration should be selected according to the actual workpiece and machining process.

Please provide:

• Maximum workpiece length

• Maximum workpiece width

• Maximum workpiece height

• Maximum workpiece weight

• Workpiece material

• Drawing or 3D model

• Required boring diameter

• Required boring depth

• Hole-system requirements

• Milling requirements

• Drilling requirements

• Reaming requirements

• Tapping requirements

• Required machining faces

• Required tolerances

• Surface finish requirements

• Spindle speed requirement

• Spindle torque requirement

• X-axis travel requirement

• Y-axis travel requirement

• Z-axis travel requirement

• W-axis spindle travel requirement

• Worktable size

• Rotary-table accuracy requirement

• Tool magazine requirement

• Accessory milling-head requirement

• Spindle internal coolant requirement

• Workpiece measurement requirement

• Tool measurement requirement

• Chip-management requirement

• Workpiece loading method

• Crane capacity

• Foundation and site information

• CNC control preference

MachineryPLUS can assist with selecting the correct PBC130s configuration according to the actual component and manufacturing process.


Configuration Before Quotation

The following should be confirmed before final quotation:

• 1600 × 1800 or 2000 × 2000 mm worktable

• 2000 / 3000 / 4000 mm X-axis travel

• 1600 / 2000 / 2500 mm Y-axis travel

• 1600 / 2000 mm Z-axis travel

• W-axis configuration

• CNC control

• Rotary worktable

• Linear-scale package

• Tool magazine

• Accessory milling heads

• Spindle internal coolant

• Coolant system

• Chip-removal system

• Worktable protection

• Workpiece measurement

• Tool measurement

• Foundation

• Installation requirements

• Electrical requirements

The manufacturer states that catalogue technical parameters are reference values and the final supplied machine specification should prevail.


Complete Your Machine Setup

A high-accuracy CNC horizontal milling and boring machine is only one part of the complete manufacturing system.

MachineryPLUS can also assist with:

• CNC machine selection

• Precision boring tools

• Fine boring systems

• Boring bars

• Large-diameter milling cutters

• Face mills

• Indexable drilling tools

• Reaming tools

• Threading tools

• BT50 / JT50 tool holders

• Heavy-duty workholding

• Fixtures

• Rotary worktables

• Tool measurement

• Workpiece measurement

• Coolant systems

• Chip management

• Workpiece handling

• Automation

• Integrated manufacturing solutions

This allows the machine, tooling, workholding, material handling and production process to be considered as one complete manufacturing solution.


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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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