CGK-19 / CGK-74 CNC Electrode Double-End Boring and Scraping Machine
Both Ends Bored and Scraped in One Setup
The CGK-19 and CGK-74 prepare graphite electrode bodies with parallel end faces and accurately centered holes before downstream threading.
Before an electrode body can be threaded, both end faces must be flat and perpendicular to the axis, and both center holes must be accurately located. The CGK-19 / CGK-74 performs double-end boring and scraping in one clamping, so the two end faces share the same datum and the center holes remain coaxial. A purpose-built CNC control, precision AC servo drives and a heavy, vibration-damped bed keep end-face flatness and thread-centerline perpendicularity within 0.03 mm. The machine is designed as a standalone cell and also integrates into automatic electrode-body processing lines.
Request a Quote →Key Features & Working Principle
Six capabilities that make double-end boring and scraping accurate and production-ready.
Double-End Boring & Scraping
Both end faces are scraped and both center holes are bored in one clamping, so the faces are parallel and the holes are coaxial from the same datum.
Full CNC Axis Control
Every cutting and positioning axis is CNC controlled, removing mechanical transmission error and giving repeatable setup from part to part.
Floating Length Positioning
A CNC length-floating or fixed-length positioning system replaces complex mechanical/hydraulic stops, simplifying setup and raising automation.
Sectional Cutting-Load Programming
The program distributes cutting load by section across the cut, keeping tool engagement steady and protecting surface finish and tool life.
Heavy Linear Guideways
Precision heavy-duty linear rolling guideways carry the moving axes under high cutting forces while maintaining long-term accuracy and durability.
Two Model Sizes
CGK-19 covers Φ300–Φ800 mm × 1600–3200 mm; CGK-74 covers Φ450–Φ900 mm × 1600–3370 mm, so plants choose the size that matches their product mix.
Why Choose the CGK-19 / CGK-74
Against separate lathes or manual scraping, the CGK-19 / CGK-74 wins on accuracy, throughput and integration with electrode-body lines.
One-Datum End Geometry
Both ends are machined in one clamping, so end-face flatness and thread-centerline perpendicularity stay within 0.03 mm without cumulative setup error.
Built for Production Lines
The machine works as a standalone cell or as a supporting unit in automatic graphite electrode-body processing lines.
Wide Electrode Coverage
Two model sizes span Φ300–Φ900 mm diameters and up to 3370 mm lengths, covering most HP/UHP/RP electrode bodies.
Heavy, Stable Bed
Machine weights of 26 t (CGK-19) and 35 t (CGK-74) absorb cutting forces and damp vibration during double-end machining.
Balanced, Stable Cutting
Sectional load programming spreads cutting forces evenly across the cut, improving finish and reducing tool breakage in hard graphite grades.
Lower Handling Cost
One setup, one operator and automatic cycles reduce handling time and rework compared to boring and scraping each end separately.
CGK-19 / CGK-74 — Technical Data
Main technical performance indicators from the factory datasheet.
| Parameter | Unit | CGK-19 | CGK-74 |
|---|---|---|---|
| Model | — | CGK-19 | CGK-74 |
| Machined electrode diameter | mm | Φ300–Φ800 | Φ450–Φ900 |
| Machined electrode length | mm | 1600–3200 | 1600–3370 |
| Main motor power | kW | 37 | 45 |
| Spindle speed | rpm | 220 stepless | 220 stepless |
| Thread centerline-to-end-face perpendicularity | mm | ≤0.03 | ≤0.03 |
| End-face flatness | mm | ≤0.03 | ≤0.03 |
| Machine weight | t | 26 | 35 |
| Overall dimensions (L×W×H) | mm | 9000×3400×2600 | 8800×3100×2600 |
Materials & Industries Served
Designed for carbon plants preparing graphite electrode bodies before threading and final assembly.
Frequently Asked Questions
What does a double-end boring and scraping machine do?
What electrode sizes can the CGK-19 and CGK-74 process?
What accuracy does the CGK-19 / CGK-74 achieve?
How does the length positioning system work?
What control system does the machine use?
What information is needed for a quotation?
Configure a CGK-19 / CGK-74 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-19 or CGK-74 configuration and prepare a quotation.
Request a Quote →
