⚙️ Cylindrical Lathe

CGK-31 / CGK-73 CNC Electrode Multi-Tool Cylindrical Lathe

A full CNC multi-tool lathe for turning graphite electrode bodies to final outer-diameter geometry. Two model sizes cover Φ300–Φ900 mm diameters and up to 3370 mm lengths, holding external circularity within 0.07 mm and diameter tolerance within ±0.1 mm.

Request a Quote Technical Specs ↓

Φ300–Φ900 mm

Electrode Diameter

≤0.07 mm

External Circularity

37×2–45 kW

Main Motor

26–38 t

Machine Weight

Turn Electrode Bodies to Final Outer Diameter

The CGK-31 and CGK-73 finish-turn graphite electrode bodies with multiple tools in a single CNC cycle.

CGK-31 / CGK-73 CNC electrode multi-tool cylindrical lathe in a production plant

Graphite electrode bodies must be turned to a consistent outer diameter before downstream boring and threading. The CGK-31 / CGK-73 is a full CNC multi-tool cylindrical lathe designed for this operation, using a rigid bed and multiple cutting stations to remove material efficiently while holding external circularity within 0.07 mm and diameter tolerance within ±0.1 mm. The two model sizes let plants match machine capacity to their electrode mix, and the CNC control makes changeover between diameters and lengths a program selection rather than a mechanical setup.

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Key Features & Working Principle

Six capabilities that make electrode-body turning accurate and productive.

1️⃣

Multi-Tool Turning

Several cutting tools are arranged around the electrode so roughing, finishing and sizing operations run in one coordinated CNC cycle.

2️⃣

Full CNC Axis Control

Every carriage and tool position is CNC controlled, removing mechanical transmission error and giving repeatable diameter control from part to part.

3️⃣

Two Model Sizes

CGK-31 covers Φ300–Φ800 mm × 1600–3200 mm; CGK-73 covers Φ450–Φ900 mm × 1600–3370 mm, matching a wide electrode product mix.

4️⃣

Rigid, Heavy Bed

Machine weights of 26 t (CGK-31) and 38 t (CGK-73) absorb turning forces and damp vibration during heavy cuts in abrasive graphite.

5️⃣

Program-Driven Changeover

Different electrode diameters and lengths are handled by calling the stored part program, reducing setup time and operator variability.

6️⃣

Precision Linear Guideways

Heavy-duty linear guideways support the carriage under cutting load, maintaining long-term positioning accuracy and smooth finishing passes.

Why Choose the CGK-31 / CGK-73

Against general-purpose lathes, the CGK-31 / CGK-73 wins on electrode range, rigidity and CNC repeatability.

🎯

Electrode-Specific Geometry Control

External circularity within 0.07 mm and diameter error within ±0.1 mm give electrode bodies the straightness and size consistency needed for furnace joints.

🏆

Wide Diameter Coverage

Two models span Φ300–Φ900 mm and up to 3370 mm in length, covering RP, HP and UHP electrode body sizes.

⚙️

Built for Graphite Cutting

The multi-tool layout and heavy bed are designed for the abrasive dust and intermittent cutting loads of graphite electrode turning.

📐

Repeatable from First Piece to Last

CNC tool paths and stored offsets remove the operator-dependent variability of manual lathes across a production shift.

🛡️

Line-Ready Standalone Cell

The machine works as a standalone cell and also feeds into automatic electrode-body processing lines.

💰

Lower Setup Cost

Program-call changeover between electrode sizes cuts mechanical setup time and tooling changes compared to conventional lathes.

CGK-31 / CGK-73 — Technical Data

Main technical performance indicators from the factory datasheet.

Parameter	Unit	CGK-31	CGK-73
Model	—	CGK-31	CGK-73
Machined electrode diameter	mm	Φ300–Φ800	Φ450–Φ900
Machined electrode length	mm	1600–3200	1600–3370
Main motor power	kW	37×2	45
External diameter circularity error	mm	≤0.07	≤0.07
External diameter error	mm	±0.1	±0.1
Machine weight	t	26	38

Materials & Industries Served

Designed for carbon plants turning graphite electrode bodies to finished outer diameter before boring and threading.

🔩

Graphite Electrode Body OD Turning

Φ300–Φ900 · 1600–3370 mm

⚡

UHP / HP / RP Electrodes

Pre-bore turning and sizing

🏭

Electrode Manufacturing Plants

Body + nipple matched production

🔗

Electrode-Body Processing Lines

Standalone or in-line integration

🔥

Electric Arc Furnace Steelmaking

EAF · Ladle furnace electrodes

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Mixed-Spec Body Production

CGK-31 / CGK-73 program selection

Frequently Asked Questions

What does the CGK-31 / CGK-73 multi-tool cylindrical lathe do?

It finish-turns graphite electrode bodies to final outer diameter in one CNC cycle. Multiple cutting tools rough, finish and size the cylinder so the body is ready for downstream boring and threading.

What electrode sizes can the CGK-31 and CGK-73 process?

The CGK-31 turns electrode bodies from Φ300 mm to Φ800 mm in diameter and 1600 mm to 3200 mm in length. The CGK-73 turns diameters from Φ450 mm to Φ900 mm and lengths from 1600 mm to 3370 mm.

What turning accuracy does the machine achieve?

Both models hold external diameter circularity within 0.07 mm and external diameter error within ±0.1 mm. These tolerances give electrode bodies the straightness and consistency needed for furnace-column assembly.

How does multi-tool turning help productivity?

Several tools are arranged to rough and finish the electrode in the same clamping, so the body does not need to be moved between separate machines. The CNC program selects tool paths and feeds for each electrode specification.

What control system does the machine use?

All motion axes are controlled by a CNC system with stored part profiles. Programs call up the correct tool paths, speeds and offsets for each electrode size, removing the need for mechanical cams or template changes.

What information is needed for a quotation?

Send us your electrode diameter and length range, production target, electrode grade, and whether the machine will run as a standalone cell or within an automatic processing line. Include workshop layout, power supply and foundation details so our engineering team can recommend the CGK-31 or CGK-73 configuration.

Configure a CGK-31 / CGK-73 for Your Electrode Body Production

Send us your electrode diameter and length range, production target, electrode grade, and whether the machine will run as a standalone cell or within an automatic processing line. Include power supply, foundation and workshop layout details — our engineering team will recommend the CGK-31 or CGK-73 configuration and prepare a quotation.