CGK-42 CNC Carbon Electrode Cylindrical Multi-Tool Machine
Turn and Finish Large Carbon Electrode Outer Diameters
The CGK-42 machines the cylindrical body and seating surfaces of large carbon electrodes before downstream threading.
Carbon electrodes for submerged-arc furnaces must be turned to a consistent outer diameter and have clean, square end faces before threading. The CGK-42 is a full CNC multi-tool cylindrical machine built for these large workpieces, using multiple cutting tools and a 75 kW main drive to remove material efficiently on electrodes up to Φ1400 mm. Automatic end-face floating positioning, a crack-prevention hydraulic chuck and CNC-controlled multi-pass machining keep outer diameter tolerance within ±0.3 mm and end-face-to-center perpendicularity within 0.06 mm, while integrated dust collection and automatic lubrication protect the machine and the workshop environment.
Request a Quote →Key Features & Working Principle
Six capabilities that make the CGK-42 productive on large carbon electrode outer diameters.
Multi-Tool Cylindrical Machining
Several cutting tools are arranged to rough, finish and size the electrode outer diameter and seating surfaces in one coordinated CNC cycle.
Two/Three-Pass Cutting
CNC programs divide the cut into two or three passes, balancing material removal, surface finish and tool life on large carbon electrodes.
Automatic End-Face Floating Positioning
The machine references the workpiece end face automatically with a floating system, compensating for blank-length variation and setting the machining datum correctly.
Crack-Prevention Hydraulic Chuck
A single-action or three-jaw hydraulic chuck clamps the outer diameter with the clamping point set inside the bore, reducing the risk of cracking brittle carbon electrodes.
Two-Axis CNC with Safety Logic
The CNC system provides travel-limit protection, software and hardware limit protection, fault detection and alarm functions for safe unattended operation.
Built-In Dust Collection & Lubrication
A dust hood with two extraction ports captures carbon dust at the source, while circulating oil cooling and automatic lubrication protect the spindle bearings, guideways and ball screws.
Why Choose the CGK-42
Against general-purpose lathes, the CGK-42 wins on electrode size, multi-tool integration and crack-safe fixturing.
Sized for Large Carbon Electrodes
Φ800–Φ1400 mm diameters and 1500–3000 mm lengths cover the large carbon electrodes used in silicon and ferroalloy smelting.
High-Power Main Drive
A 75 kW main motor delivers the torque needed for heavy turning cuts on large-diameter carbon electrodes without stalling.
Brittle-Material Clamping
The hydraulic chuck clamps the outer diameter while the clamping point sits inside the bore, reducing clamping stress on carbon electrodes.
Cleaner, Safer Workshop
A cutter dust hood with two suction ports captures carbon dust at the source, while automatic lubrication and cooling extend spindle and drive life.
High Automation
Except for loading and unloading, all motions are automatic, including end-face floating positioning, multi-pass cutting and fault monitoring.
Configurable for the Plant
A coolant system can be added on request, and the CNC program library stores profiles for different electrode specifications.
CGK-42 — Technical Data
Main technical performance indicators from the factory datasheet.
| Parameter | Unit | CGK-42 |
|---|---|---|
| Model | — | CGK-42 |
| Machined workpiece diameter | mm | Φ800–Φ1400 |
| Machined workpiece length | mm | 1500–3000 |
| Main motor power | kW | 75 |
| Carbon electrode outer diameter tolerance | mm | ±0.3 |
| Carbon electrode thread diameter tolerance | mm | ±0.1 |
| End face-to-thread center perpendicularity tolerance | mm | 0.06 |
| Machine weight | t | 34 |
Materials & Industries Served
Designed for plants turning and finishing large carbon electrodes for high-current submerged-arc furnace applications.
Frequently Asked Questions
What is the CGK-42 used for?
What electrode sizes can the CGK-42 process?
What accuracy does the CGK-42 achieve?
How does multi-pass cutting work on large electrodes?
How is the carbon electrode clamped without cracking?
What information is needed for a quotation?
Configure a CGK-42 for Your Carbon Electrode Production
Send us your carbon electrode diameter and length range, thread or OD specification, electrode grade, daily throughput target, and whether you need the coolant or dust-collection configuration. Include power supply, foundation and workshop layout details — our engineering team will prepare a machine configuration with confirmed specifications and a quotation.
Request a Quote →
