NEW SMTCL STC22s Series CNC Pipe Thread Lathe

NEW SMTCL STC22s Series CNC Pipe Thread Lathe

The SMTCL STC22s Series is an economical CNC pipe thread lathe designed for petroleum pipe, casing and other tubular components requiring a practical combination of large spindle through-bore capacity and long-bed turning capability.

The STC22s uses a conventional long-bed CNC lathe architecture with available cutting lengths of 1500 mm and 3000 mm.

This makes the machine particularly suitable where customers require both:

• Pipe-thread machining

and

• Longer conventional turning capability

Typical applications include:

• Petroleum pipe

• Oilfield casing

• Pipe couplings

• Tubular connections

• Threaded pipe ends

• Long tubular components

• General pipe machining

• Repair and reconditioning work


STC22s Series Positioning

The STC22s is positioned as an economical and practical CNC pipe thread lathe for medium-size petroleum pipe and casing machining.

Its main strengths include:

• Large spindle through-hole

• Long 1500 / 3000 mm cutting lengths

• Practical conventional CNC lathe architecture

• Pipe-thread machining capability

• Longitudinal turning capability

• Straightforward 4-station turret configuration

The STC22s is well suited where a dedicated short-cycle pipe-end machine would be too specialised.


Key Specifications

• Maximum rotary diameter: 1250 mm

• Maximum cutting length:
1500 mm / 3000 mm

• Maximum spindle through-hole cutting diameter:
220 mm

• Petroleum product range:
4 1/2 in – 8 5/8 in

• Maximum spindle speed:
450 rpm

• Spindle motor:
22 / 30 kW for 1500 mm configuration

• Spindle motor:
30 / 37 kW for 3000 mm configuration

• Spindle through-hole:
240 mm

• X-axis travel:
650 mm

• Z-axis travel:
1500 mm or 3000 mm depending on machine length

• Standard turret:
Vertical 4-station

• Tool section:
40 × 40 mm

Final CNC system and optional equipment should be confirmed at quotation stage.


Two Main Machine-Length Configurations

The STC22s is available with two principal cutting-length options.


1500 mm Cutting Length

Typical spindle motor:

• 22 / 30 kW

Best suited where:

• Pipe-end machining is the main requirement

• Moderate longitudinal turning is required

• A shorter machine footprint is preferred

• 1500 mm machining length is sufficient


3000 mm Cutting Length

Typical spindle motor:

• 30 / 37 kW

Best suited where:

• Longer tubular components are common

• Greater longitudinal turning capability is required

• Longer external or internal diameters need machining

• Additional spindle motor capacity is beneficial


240 mm Spindle Through-Hole

A key feature of the STC22s is its:

• 240 mm spindle through-hole

This allows long tubular workpieces to pass through the spindle while the machining zone remains concentrated around the required section.

The machine provides:

• Up to 220 mm maximum through-hole cutting diameter

This is particularly useful for:

• Petroleum pipe

• Casing

• Tubular connections

• Pipe couplings

• Long hollow components


Petroleum Product Range

The current supplier-confirmed petroleum product range is:

• 4 1/2 in – 8 5/8 in

This places the STC22s in the medium-size petroleum tubular category.

Final suitability should be confirmed against:

• Pipe outside diameter

• Pipe inside diameter

• Thread standard

• Thread profile

• Material

• Required machining length


450 rpm Maximum Spindle Speed

The STC22s provides:

• Maximum spindle speed: 450 rpm

This relatively low spindle speed is appropriate for:

• Large-bore tubular work

• Pipe-thread cutting

• Casing machining

• Larger-diameter turning

• Heavy pipe-end operations

The STC22s should therefore be evaluated according to:

• Bore capacity

• Workpiece size

• Cutting length

• Threading capability

rather than spindle rpm alone.


Long-Bed Machining Capacity

The STC22s provides:

• X-axis travel: 650 mm

• Z-axis travel: 1500 mm or 3000 mm

This gives the machine substantially more longitudinal machining capability than a short-cycle dedicated pipe-thread machine.

The longer Z-axis supports:

• Longitudinal turning

• External diameter machining

• Internal turning

• Threading

• Facing

• Grooving

• Pipe-end preparation

• General tubular machining


Standard Vertical 4-Station Turret

The current supplier-confirmed specification identifies:

• Vertical 4-station turret

• 40 × 40 mm tool section

This provides a straightforward tooling arrangement for:

• External turning

• Internal turning

• Threading

• Grooving

• Facing

The conventional turret layout is practical for workshops requiring reliable general pipe-thread machining without unnecessary complexity.


Typical Machining Operations

The STC22s can support:

• External turning

• Internal turning

• Facing

• External threading

• Internal threading

• Grooving

• Thread relief machining

• Pipe-end preparation

• Longitudinal turning

• General tubular machining


Typical Industries

The STC22s is particularly suited to:

• Oil and gas

• Petroleum tubular manufacturing

• Casing production

• Pipe processing

• Oilfield equipment

• Tubular component manufacturing

• Repair and reconditioning operations

• General engineering involving long tubular components


Typical Workpieces

Typical STC22s workpieces may include:

• Petroleum pipe

• Medium-size casing

• Pipe couplings

• Tubular connections

• Threaded pipe ends

• Oilfield tubular components

• Hollow shafts

• Long cylindrical components


Why Consider the STC22s?

The STC22s is a practical choice where customers need pipe-thread capacity combined with longer conventional turning capability.

Key reasons to consider the STC22s include:

• 1250 mm maximum rotary diameter

• 1500 / 3000 mm cutting-length options

• 240 mm spindle through-hole

• 220 mm maximum through-hole cutting diameter

• Petroleum product range up to 8 5/8 in

• 450 rpm maximum spindle speed

• 22 / 30 kW spindle motor on 1500 mm configuration

• 30 / 37 kW spindle motor on 3000 mm configuration

• 650 mm X-axis travel

• 1500 / 3000 mm Z-axis travel

• Vertical 4-station turret

• 40 × 40 mm tool section

• Long-bed CNC lathe architecture

• Practical combination of threading and general turning


STC22s Compared with STC34s

The STC22s and STC34s share the same general long-bed pipe-thread lathe concept.

The main difference is tubular capacity.


STC22s

• Maximum rotary diameter: 1250 mm

• Cutting length: 1500 / 3000 mm

• Maximum through-hole cutting diameter: 220 mm

• Petroleum product range:
4 1/2 in – 8 5/8 in

• Maximum spindle speed: 450 rpm

• Spindle through-hole: 240 mm

• X/Z travel:
650 / 1500 or 3000 mm

• Standard turret:
Vertical 4-station, 40 × 40 mm


STC34s

• Maximum rotary diameter: 1250 mm

• Cutting length: 1500 / 3000 mm

• Maximum through-hole cutting diameter: 340 mm

• Petroleum product range:
5 1/2 in – 13 3/8 in

• Maximum spindle speed: 350 rpm

• Spindle through-hole: 355 mm

• X/Z travel:
650 / 1500 or 3000 mm

• Standard turret:
Vertical 4-station, 40 × 40 mm


Choose STC22s when:

• 240 mm spindle bore is sufficient

• Product sizes remain within approximately 8 5/8 in

• Medium-size petroleum pipe and casing dominate

• Higher 450 rpm spindle speed is useful


Choose STC34s when:

• 355 mm spindle through-hole is required

• Larger casing is common

• Product range extends toward 13 3/8 in

• Significantly larger tubular capacity is necessary


STC22s Compared with S22

The STC22s and S22 both cover medium-size petroleum tubular work, but they are designed around different machining concepts.


STC22s

Positioning:

• Economical and practical CNC pipe thread lathe

Key characteristics:

• 1500 / 3000 mm cutting length

• 240 mm spindle through-hole

• 220 mm maximum through-hole cutting diameter

• Petroleum range:
4 1/2 in – 8 5/8 in

• 450 rpm maximum spindle speed

• Vertical 4-station turret

• Long-bed architecture


Best suited where:

• Longer longitudinal turning is required

• General turning capability matters

• Pipe threading is one part of a broader machining requirement

• A conventional long-bed layout is preferred


S22

Positioning:

• High-efficiency, high-accuracy dedicated pipe-thread CNC machine

Typical characteristics:

• 200 mm cutting length

• 240 / 260 mm spindle bore

• 220 / 245 mm cutting diameter

• Petroleum product range:
5 1/2 in – 8 5/8 in
or
5 1/2 in – 9 5/8 in

• 22 / 30 kW servo spindle

• Short-cycle production concept

• Row-tool arrangement


Best suited where:

• Machining is concentrated at the pipe end

• Repeated pipe-thread production dominates

• Short cycle time is important

• Dedicated thread-production efficiency is required


In simple terms:

STC22s = long-bed practical pipe-thread lathe

S22 = short-cycle high-efficiency pipe-thread production machine


STC Series Selection Guide

STC22s

Best suited for:

• Medium petroleum pipe

• Medium casing

• Longitudinal turning

• Product sizes up to approximately 8 5/8 in


STC34s

Best suited for:

• Large petroleum pipe

• Large casing

• Large tubular products

• Longitudinal turning

• Product sizes up to approximately 13 3/8 in


The correct STC model should be selected primarily according to:

• Pipe outside diameter

• Required spindle through-hole

• Required cutting length

• Thread size

• Workpiece material

• Production requirement


STC Series vs S Series

The STC and S families should not be treated as simple model-size alternatives.


STC Series

Focus:

• Economical and practical

• Long-bed CNC lathe architecture

• Longer longitudinal turning

• Pipe threading plus broader turning capability


S Series

Focus:

• High efficiency

• High accuracy

• Short-cycle pipe-end machining

• Production-oriented petroleum threading


Choose STC where:

• Longer workpiece machining is required

• General turning capability is important

• A conventional CNC lathe layout is preferred


Choose S Series where:

• Thread production dominates

• Machining is concentrated at the pipe end

• Cycle time and repeatability are higher priorities


Machine Selection and Configuration

The correct STC22s configuration should be selected according to the actual tubular component.

Please provide:

• Pipe outside diameter

• Pipe inside diameter

• Product type

• Casing / pipe / tubular component type

• Thread standard

• Thread form

• Thread size

• Thread pitch

• Internal or external thread

• Workpiece material

• Required machining length

• Maximum workpiece length

• Maximum workpiece weight

• Required tolerance

• Production quantity

• Workholding requirement

• Tooling requirement

• CNC control preference

• Coolant requirement

• Chip-management requirement

• Workshop power supply

• Delivery location

MachineryPLUS can assist with selecting the correct STC22s machine length, tooling and configuration according to the actual workpiece.


Configuration Before Quotation

The following should be confirmed before final quotation:

• 1500 mm or 3000 mm cutting length

• Maximum pipe diameter

• Required spindle through-hole

• Thread standard

• CNC system

• Workholding / clamping system

• Turret configuration

• Threading-tool package

• Coolant system

• Chip-removal system

• Pipe-support requirement

• Foundation

• Installation requirements

• Electrical requirements

Final system and options should be confirmed at quotation stage.


Complete Your Pipe Thread Machining Setup

MachineryPLUS can also assist with:

• CNC pipe thread lathe selection

• External threading tools

• Internal threading tools

• Turning tools

• Grooving tools

• Boring bars

• Thread inserts

• Tool holders

• Pipe-support solutions

• Workholding

• Measuring equipment

• Coolant solutions

• Chip management

• Tool storage

• Production setup advice


Explore More from MachineryPLUS

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

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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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