NEW SMTCL HTC6330b CNC Collar Lathe

NEW SMTCL HTC6330b CNC Collar Lathe

The SMTCL HTC6330b is a specialised CNC collar lathe designed primarily for machining petroleum pipe collars and couplings.

The machine can also be used for machining larger disc-type workpieces where a rigid horizontal turning platform is required.

Unlike a conventional general-purpose CNC lathe, the HTC6330b is built around:

• Petroleum collar machining

• Short-length large-diameter turning

• Threaded coupling components

• Large rotary workpieces

• High-rigidity turning

• Repeat production

The machine uses a three-guide-rail bed structure to improve rigidity, while the extended X-axis saddle allows machining of larger rotary components.


HTC6330b Key Specifications

• Machined collar diameter:
5 1/2 in – 20 in

• Maximum turning length:
300 mm

• Height from spindle centre to guide-rail surface:
460 mm

• Height from spindle centre to floor:
1160 mm

• Spindle bore:
85 mm

• Number of spindle speed ranges:
2

• Spindle speed range:
20–1500 rpm

• Tool holder:
Vertical 8-station / vertical 6-station

• X-axis travel:
420 mm

• Z-axis travel:
800 mm

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


Specialised Collar Machining Platform

The HTC6330b is designed specifically for machining petroleum collars and related tubular connection components.

Typical work includes:

• Pipe collar turning

• Coupling machining

• External diameter turning

• Internal diameter turning

• Facing

• Grooving

• Internal threading

• External threading

• Thread relief machining

• Connection preparation


The 300 mm maximum turning length reflects the machine’s focus on short collar and coupling components rather than long shaft-type workpieces.


Petroleum Collar Capacity

The manufacturer identifies the HTC6330b machining range as:

• 5 1/2 in – 20 in collar diameter

This gives the machine useful coverage for a broad range of petroleum pipe collar and coupling sizes.

Final suitability should be confirmed against:

• Collar outside diameter

• Collar inside diameter

• Thread standard

• Thread form

• Workpiece material

• Required thread tolerance


Three-Guide-Rail Structure

A key structural feature of the HTC6330b is its:

• Three-guide-rail bed design

The manufacturer specifically identifies this structure as providing good body rigidity.

Benefits include:

• Strong support under cutting load

• Improved stability for large-diameter work

• Better resistance to deformation

• Stable machining of heavy collars and disc-type parts


Extended X-Axis Saddle

The HTC6330b uses a relatively long X-axis saddle.

The manufacturer states that this allows the machine to handle:

• Large rotary parts

This makes the machine useful not only for petroleum collars, but also for selected disc-type components requiring substantial radial tool movement.


Spindle System

The machine provides:

• 85 mm spindle bore

• Two spindle speed ranges

• 20–1500 rpm spindle speed range

The two-range spindle system provides flexibility for:

• Lower-speed, higher-load cutting

• General turning

• Thread machining

• Higher-speed finishing


The wide speed range helps the machine handle different collar diameters and machining operations.


Short-Length, Large-Diameter Machining

The HTC6330b combines:

• 5 1/2 in – 20 in collar capacity

with

• 300 mm maximum turning length

This makes it fundamentally different from a conventional long-bed lathe.

The machine is optimised for:

• Short heavy components

• Couplings

• Collars

• Large-diameter threaded parts

• Disc-type workpieces


X / Z Axis Capacity

The machine provides:

• X-axis travel: 420 mm

• Z-axis travel: 800 mm

This supports:

• OD turning

• ID turning

• Facing

• Grooving

• Threading

• Tool approach

• Larger rotary workpiece machining


Turret Options

The formal HTC6330b specification identifies:

• Vertical 8-station tool holder

or

• Vertical 6-station tool holder

Depending on the required configuration, the broader manufacturer equipment table also identifies available turret concepts including:

• Vertical 4-station electric turret

• Vertical 6-station servo turret

• Vertical 8-station servo turret

• Horizontal 8-station servo turret

• Horizontal 12-station servo turret

Final turret compatibility should be confirmed specifically for the ordered HTC6330b configuration.


Typical Machining Operations

The HTC6330b can support:

• External turning

• Internal turning

• Facing

• Grooving

• External threading

• Internal threading

• Thread relief machining

• Collar machining

• Coupling machining

• Disc-type component machining


Typical Industries

The HTC6330b is primarily suited to:

• Oil and gas

• Petroleum tubular manufacturing

• Pipe coupling manufacturing

• Collar manufacturing

• Oilfield equipment

• Tubular connection production

• Repair and reconditioning operations


Typical Workpieces

Typical HTC6330b workpieces may include:

• Petroleum pipe collars

• Pipe couplings

• Casing couplings

• Tubing couplings

• Threaded connection components

• Oilfield tubular accessories

• Large disc-type components

• Short ring-type workpieces


Why Consider the HTC6330b?

The HTC6330b is a strong choice where customers require a dedicated CNC platform for petroleum collar machining.

Key reasons to consider the HTC6330b include:

• Dedicated collar-lathe architecture

• 5 1/2 in – 20 in collar machining range

• 300 mm maximum turning length

• 85 mm spindle bore

• 20–1500 rpm spindle speed range

• Two spindle speed ranges

• 420 mm X-axis travel

• 800 mm Z-axis travel

• Vertical 6-station or 8-station turret configuration

• Three-guide-rail bed structure

• High structural rigidity

• Extended X-axis saddle

• Suitable for large rotary workpieces

• Suitable for petroleum collar and coupling machining


HTC6330b vs S Series

The HTC6330b and S18 / S22 / S34 serve different parts of the petroleum tubular manufacturing process.


HTC6330b

Focus:

• Collar / coupling machining

• Short ring-type workpieces

• Large external diameters

• Petroleum connection components


S Series

Focus:

• Petroleum pipe

• Casing

• Drill pipe

• Pipe-end thread machining

• Long tubular stock passing through the spindle


Choose HTC6330b where:

• The workpiece is a collar or coupling

• The part is short and ring-shaped

• Large external diameter is more important than large through-spindle pipe capacity


Choose S Series where:

• Long pipe passes through the spindle

• Pipe-end thread production is the main process


HTC6330b vs STC Series

HTC6330b

Positioning:

• Specialised CNC collar lathe

Best suited for:

• Pipe collars

• Couplings

• Short threaded rings

• Disc-type workpieces


STC22s / STC34s

Positioning:

• Economical long-bed CNC pipe thread lathes

Best suited for:

• Long petroleum pipe

• Casing

• Longitudinal turning

• Pipe threading


The HTC6330b should therefore not be marketed simply as another pipe-thread lathe.

It is a dedicated collar / coupling machining machine.


Standard CNC Control

The formal manufacturer configuration table identifies:

• FANUC 0i-TF as standard

Optional:

• SIEMENS 828D


Final control configuration should be confirmed at quotation stage.


Clamping / Holding System

The manufacturer configuration table identifies possible clamping concepts including:

• Pneumatic hollow clamping

• Electric hollow clamping

• Manual hollow clamping

The exact HTC6330b clamping system supplied should be confirmed against the selected machine configuration.


Spindle and Feed-System Options

The manufacturer configuration table lists items including:

• Spindle encoder

• Domestic spindle bearings

• Imported spindle bearings

• Domestic lead-screw bearings

• Imported lead-screw bearings

• Domestic lead screw

• Imported lead screw

• Imported guide rails

Final supplied component configuration depends on the selected specification.


Auxiliary Equipment

Manufacturer-listed equipment and options include:

• Chip-removal unit

• Cut-to-length function

• Hydraulic system

• Pneumatic system

• Feeder

Availability and compatibility should be confirmed before quotation.


Machine Selection and Configuration

The correct HTC6330b configuration should be selected according to the actual collar or coupling.

Please provide:

• Collar outside diameter

• Collar inside diameter

• Workpiece length

• Product type

• Tubing / casing / drill-pipe connection type

• Thread standard

• Thread form

• Thread size

• Thread pitch

• Internal or external thread

• Workpiece material

• Required tolerance

• Surface finish requirement

• Production quantity

• Workholding requirement

• Tooling requirement

• Turret requirement

• CNC control preference

• Coolant requirement

• Chip-management requirement

• Automation requirement

MachineryPLUS can assist with selecting the correct HTC6330b configuration according to the actual collar, coupling and thread requirement.


Configuration Before Quotation

The following should be confirmed before final quotation:

• Workpiece diameter

• Workpiece length

• Thread standard

• CNC system

• Clamping system

• Vertical 6-station or 8-station turret

• Tooling package

• Threading tools

• Coolant system

• Chip-removal system

• Hydraulic / pneumatic requirements

• Feeder requirement if applicable

• Foundation

• Installation requirements

• Site electrical requirements

Final technical specifications depend on the selected machine configuration.

The manufacturer notes that catalogue parameters are for reference and the final supplied machine specification should prevail.


Complete Your Collar Machining Setup

MachineryPLUS can also assist with:

• CNC collar lathe selection

• External threading tools

• Internal threading tools

• 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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