NEW SMTCL S34 Series High-Efficiency CNC Pipe Thread Lathe

NEW SMTCL S34 Series High-Efficiency CNC Pipe Thread Lathe

The SMTCL S34 Series is a high-efficiency, high-accuracy CNC pipe thread lathe designed for large-diameter petroleum pipe, casing and drill-pipe thread machining.

As the largest model in SMTCL’s current S Series high-efficiency pipe-thread range, the S34 is built around a large spindle through-bore, high-rigidity structure and short-cycle pipe-end machining concept.

The S34 is particularly suited to customers machining larger petroleum tubular products where:

• Large spindle bore is essential

• Large pipe and casing diameters are common

• Thread machining is concentrated at the pipe end

• High repeatability is required

• Production efficiency is important

• API-type petroleum thread forms are required


S34 Series Positioning

The S Series is positioned by the manufacturer as a:

High-Efficiency CNC Pipe Thread Lathe

The S Series is designed specifically for:

• Petroleum pipe

• Petroleum casing

• Drill pipe

• Drill-pipe joints

• Drill collars

• Other petroleum tubular components


The S Series combines:

• High accuracy

• High efficiency

• High rigidity

• High accuracy retention

• Dedicated petroleum-thread machining capability


S34 Key Specifications

• Maximum body swing: Ø850 mm

• Maximum cutting length: 200 mm

• Maximum cutting diameter:
Ø280 mm / Ø340 mm depending on configuration

• Petroleum product range:
6 5/8 in – 10 3/4 in
or
6 5/8 in – 13 3/8 in

• Spindle speed range:
90–400 rpm

• Main motor:
30 / 37 kW servo

• Spindle bore:
Ø300 mm / Ø365 mm depending on configuration

• X-axis rapid traverse:
8 m/min

• Z-axis rapid traverse:
10 m/min

• X-axis travel:
400 mm

• Z-axis travel:
600 mm

• Machining accuracy:
IT6

• Standard tool carriage:
32 × 32 mm row tool

• Optional tool carriage:
Vertical 6-station servo turret
Horizontal 8-station servo turret


Large-Diameter Pipe Capacity

The S34 is the largest current S-Series model.

It provides:

• Up to Ø365 mm spindle bore

• Up to Ø340 mm cutting diameter

• Petroleum product coverage up to approximately 13 3/8 in

This makes the S34 particularly suitable for:

• Large petroleum casing

• Large pipe ends

• Drill-pipe connections

• Large threaded tubular components

• Oilfield tubular production and repair


Two Main Capacity Configurations

The current manufacturer technical table identifies two principal capacity combinations.


300 mm Spindle Bore Configuration

Typical capability:

• Maximum cutting diameter: Ø280 mm

• Spindle bore: Ø300 mm

• Petroleum product range:
6 5/8 in – 10 3/4 in


Best suited for:

• Medium-large petroleum pipe

• Casing within the smaller S34 range

• Drill-pipe connection machining

• Applications where 300 mm through-bore is sufficient


365 mm Spindle Bore Configuration

Typical capability:

• Maximum cutting diameter: Ø340 mm

• Spindle bore: Ø365 mm

• Petroleum product range:
6 5/8 in – 13 3/8 in


Best suited for:

• Large casing

• Larger petroleum tubular products

• Larger pipe-thread connections

• Applications requiring maximum S34 through-bore capacity


High-Efficiency Pipe-End Machining

The S34 is designed around a short:

• 200 mm maximum cutting length

This reflects the machine’s specialised purpose.

Unlike a conventional long-bed lathe, the S34 concentrates machining around the pipe end.

Typical operations include:

• Pipe-end facing

• External threading

• Internal threading

• Thread relief machining

• Grooving

• Internal turning

• External turning

• End preparation

• Connection machining


This specialised arrangement helps improve productivity where the work is concentrated around the end of a long tubular component.


Large Spindle Through-Bore

A defining feature of the S34 is its large spindle through-hole.

Available spindle bore:

• Ø300 mm

or

• Ø365 mm

This allows long tubular workpieces to pass through the spindle while the machine concentrates on the threaded end.

This is particularly important for:

• Petroleum casing

• Oilfield pipe

• Drill pipe

• Large tubular connections


High-Power Servo Spindle

The S34 uses a:

• 30 / 37 kW main servo motor

This is the highest-power spindle package in the S18 / S22 / S34 family.

The spindle is designed around the low-speed, high-load requirements of large-diameter thread machining.


Spindle Speed Range

The S34 spindle speed range is:

• 90–400 rpm

This lower speed range is appropriate for:

• Large pipe diameter

• Large-bore work

• Thread cutting

• Heavy pipe-end machining

• High-load turning conditions


The S34 should therefore not be evaluated by maximum spindle rpm against a conventional general-purpose CNC lathe.

Its design priority is large-diameter petroleum tubular machining.


Axis Performance

The S34 provides:

• X-axis travel: 400 mm

• Z-axis travel: 600 mm

• X-axis rapid traverse: 8 m/min

• Z-axis rapid traverse: 10 m/min

The axis configuration supports:

• External thread cutting

• Internal thread cutting

• Facing

• Grooving

• Thread relief

• Pipe-end preparation


Machining Accuracy

The manufacturer specifies:

• Machining accuracy: IT6

This reflects the S Series emphasis on:

• High accuracy

• High efficiency

• High accuracy retention

Final finished-part accuracy will still depend on:

• Thread standard

• Workpiece material

• Workholding

• Tooling

• Cutting parameters

• Machine setup

• Inspection method


Standard Row-Tool Arrangement

The S34 standard tool carriage is:

• 32 × 32 mm row tool

This simple, rigid arrangement supports common production tooling including:

• External turning tools

• Internal turning tools

• Threading tools

• Grooving tools

• Facing tools


Optional Servo Turret Configurations

The manufacturer also lists optional:

• Vertical 6-station servo turret

• Horizontal 8-station servo turret

These options may be useful where:

• More tools are required

• Multiple operations are combined

• Greater automatic tool flexibility is needed


API Petroleum Thread Capability

The manufacturer states that the S Series can machine petroleum thread forms including:

• API 5B long round thread

• API 5B short round thread

• API 5CT-related casing thread applications

• Buttress thread

• Special thread forms in line with American Petroleum Institute requirements


Final thread capability should be confirmed against:

• Exact API specification

• Product size

• Thread form

• Material grade

• Customer drawing

• Required inspection standard


Typical Applications

The S34 is designed for:

• Petroleum pipe threading

• Casing threading

• Drill-pipe threading

• Large tubular connection machining

• Pipe-end preparation

• Internal and external petroleum threads


Typical Application Fields

Manufacturer application examples include:

• Petroleum pipe

• Petroleum casing

• Petroleum pipe collar

• Drill pipe joint

• Drill collar

• Petroleum-related tubular components


Typical Workpieces

Typical S34 workpieces may include:

• Large petroleum casing

• Oilfield pipe

• Drill pipe

• Pipe-end connections

• Threaded tubular components

• Large casing connections

• Drill-pipe joints

• Drill collars

• Petroleum tubular accessories


Why Consider the S34 Series?

The S34 is a strong choice where large-diameter petroleum tubular products require efficient and accurate pipe-thread machining.

Key reasons to consider the S34 include:

• Ø850 mm maximum body swing

• 200 mm production-oriented cutting length

• Up to Ø340 mm cutting diameter

• Up to Ø365 mm spindle bore

• Petroleum product range up to approximately 13 3/8 in

• 30 / 37 kW servo spindle motor

• 90–400 rpm spindle range

• 400 / 600 mm X/Z travel

• 8 / 10 m/min X/Z rapid traverse

• IT6 machining accuracy

• 32 × 32 mm standard row-tool arrangement

• Optional vertical 6-station servo turret

• Optional horizontal 8-station servo turret

• API petroleum thread capability

• High-efficiency pipe-end machining concept

• High-rigidity machine design


S34 Compared with S22

S22

• Maximum body swing: Ø720 mm

• Maximum cutting length: 200 mm

• Maximum cutting diameter:
Ø220 / Ø245 mm

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

• Spindle bore:
Ø240 / Ø260 mm

• Spindle speed:
200–600 / 200–550 rpm

• Main motor:
22 / 30 kW

• X/Z travel:
350 / 650 mm

• Rapid X/Z:
10 / 12 m/min

• Accuracy:
IT6


S34

• Maximum body swing: Ø850 mm

• Maximum cutting length: 200 mm

• Maximum cutting diameter:
Ø280 / Ø340 mm

• Petroleum product range:
6 5/8 in – 10 3/4 in
or
6 5/8 in – 13 3/8 in

• Spindle bore:
Ø300 / Ø365 mm

• Spindle speed:
90–400 rpm

• Main motor:
30 / 37 kW

• X/Z travel:
400 / 600 mm

• Rapid X/Z:
8 / 10 m/min

• Accuracy:
IT6


Choose S22 where:

• Pipe sizes remain within approximately 9 5/8 in

• Ø260 mm spindle bore is sufficient

• Smaller components dominate


Choose S34 where:

• Larger casing is common

• Greater through-bore capacity is required

• Pipe size extends toward 13 3/8 in

• Higher spindle power is beneficial


S34 Compared with S18

S18

• Body swing: Ø650 mm

• Cutting diameter:
Ø140 / Ø180 mm

• Spindle bore:
Ø160 / Ø200 mm

• Petroleum range:
up to approximately 7 in

• Main motor:
22 / 30 kW


S34

• Body swing: Ø850 mm

• Cutting diameter:
Ø280 / Ø340 mm

• Spindle bore:
Ø300 / Ø365 mm

• Petroleum range:
up to approximately 13 3/8 in

• Main motor:
30 / 37 kW


The S34 is therefore the appropriate S-Series platform where significantly larger petroleum tubular sizes are required.


S Series Selection Guide

S18

Best suited for:

• Smaller petroleum pipe

• Smaller casing

• Drill-pipe connections

• Product range up to approximately 7 in


S22

Best suited for:

• Medium-size petroleum pipe

• Medium casing

• Product range up to approximately 9 5/8 in


S34

Best suited for:

• Large petroleum pipe

• Large casing

• Large drill-pipe connections

• Product range up to approximately 13 3/8 in


The S18, S22 and S34 should therefore be selected primarily according to:

• Pipe diameter

• Spindle bore requirement

• Thread size

• Workpiece material

• Production requirement


S34 Compared with STC34s

Although both machines cover large petroleum pipe applications, they are designed around different production concepts.


S34

Positioning:

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

Key characteristics:

• 200 mm cutting length

• Ø300 / Ø365 mm spindle bore

• Up to Ø340 mm cutting diameter

• Up to 13 3/8 in petroleum product range

• 30 / 37 kW servo spindle

• IT6 machining accuracy

• Row-tool production concept

• Optional servo turret


Best suited where:

• Work is concentrated at the pipe end

• Thread production efficiency is important

• High repeatability is required

• Dedicated petroleum thread machining dominates


STC34s

Positioning:

• Economical and practical CNC pipe thread lathe

Key characteristics:

• 1500 / 3000 mm cutting length

• Ø355 mm spindle through-hole

• Up to Ø340 mm through-hole cutting diameter

• Petroleum range up to 13 3/8 in

• Maximum spindle speed approximately 350 rpm

• Conventional longer-bed architecture


Best suited where:

• Longitudinal turning is also required

• Longer cutting length is needed

• Greater general-purpose lathe capability is useful

• Economical conventional pipe-thread machining is the priority


The S34 and STC34s therefore should not be viewed simply as two versions of the same machine.

S34 is the dedicated high-efficiency pipe-end thread platform.

STC34s is the longer-bed economical pipe-thread platform.


Standard Configuration

The manufacturer configuration table identifies standard S34 equipment including:

• FANUC 0i-TF CNC system

• Pneumatic hollow clamping system

• Spindle

• Encoder

• Domestic spindle bearings

• Imported lead-screw bearings

• Domestic lead screw

• Imported guide rails

• Row-tool machining system

• Chip-removal unit

• Cut-to-length function


Optional Configuration

Manufacturer-listed options include:

• SIEMENS 828D CNC system

• Manual hollow clamping

• Imported spindle bearings

• Imported lead screw

• Vertical 6-station servo turret

• Horizontal 8-station servo turret

• Hydraulic system

• Pneumatic system

• Feeder

Final compatibility should be confirmed for the selected machine specification.


Machine Selection and Configuration

The correct S34 configuration should be selected according to the actual pipe and thread requirement.

Please provide:

• Pipe outside diameter

• Pipe inside diameter

• Product type

• Casing / drill pipe / tubing type

• API or other thread standard

• Thread form

• Thread size

• Thread pitch

• Internal or external thread

• Material grade

• Maximum raw pipe diameter

• Required machining length

• Required tolerance

• Production quantity

• Tooling requirement

• Chucking / clamping requirement

• CNC control preference

• Coolant requirement

• Chip-management requirement

• Workshop power supply

• Delivery location

MachineryPLUS can assist with selecting the correct S34 spindle-bore and tooling configuration according to the actual petroleum tubular product.


Configuration Before Quotation

The following should be confirmed before final quotation:

• Ø300 mm or Ø365 mm spindle bore

• Maximum cutting diameter

• Petroleum product range

• Thread standard

• CNC control

• Clamping system

• Row tool or servo turret

• Threading-tool package

• Coolant system

• Chip-removal system

• Feeder requirement

• Auxiliary machining unit

• Foundation

• Installation requirements

• Electrical requirements

Final specifications depend on the selected machine configuration.

The manufacturer notes that technical parameters may change with continued product development.


Complete Your Pipe Thread Machining Setup

MachineryPLUS can also assist with:

• CNC pipe thread lathe selection

• External threading tools

• Internal threading tools

• API thread tooling

• Turning tools

• Grooving tools

• Boring bars

• Thread inserts

• Tool holders

• Workholding

• Measuring equipment

• Coolant solutions

• Chip management

• Tool storage

• Production setup advice


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