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What Is an Internal Thread Grinding Machine?
Precision Thread Grinding
Supports both internal and external threads with exact profiles and dimensions
CNC Control
5-axis servo control system enabling precise grinding of complex thread profiles
High-Rigidity Structure
Minimizes vibration and thermal distortion for stable, long-term performance
Automation Functions
Built-in dressing & balancing units ensure consistent quality
Grinding machines are categorized into various types based on their machining methods and applications. Among them, internal thread grinding machines are specialized equipment that are gaining attention for high-precision component machining.
Machine Size :
2,400 × 2,800 × 1,800 (H), 4,500 kg
Max. Workpiece Length :
100 mm
Max. Thread Diameter :
Ø80 mm
Min. Thread Diameter :
Ø10 mm
Products & Services
Centerless ginding machines (SGC 300)
ORSKOREA
ORSKOREA’s centerless grinding machines ensure stable accuracy and durability without the need for chucks or centers. By allowing workpieces to rotate freely between the grinding and regulating wheels, they deliver high-efficiency and uniform machining for shafts, pins, housings, and other cylindrical components used in aerospace, defense, and advanced automotive systems.
Key Advantages
• High productivity through fast, efficient multi-part processing
• ±2μm precision and long-term repeatability
• Versatility to handle components from small to large sizes
• Hydrostatic slides and spindles minimizing heat and vibration
• Proven stability for high-value part manufacturing such as engine components, battery cases, and optical housings
By combining productivity, accuracy, and reliability, ORSKOREA’s centerless grinders significantly enhance competitiveness in both defense and civilian applications.
Key Advantages
• High productivity through fast, efficient multi-part processing
• ±2μm precision and long-term repeatability
• Versatility to handle components from small to large sizes
• Hydrostatic slides and spindles minimizing heat and vibration
• Proven stability for high-value part manufacturing such as engine components, battery cases, and optical housings
By combining productivity, accuracy, and reliability, ORSKOREA’s centerless grinders significantly enhance competitiveness in both defense and civilian applications.
High Frequency Spindle
ORSKOREA
ORSKOREA’s high frequency grinding spindles, operating at speeds up to 120,000 rpm—the highest level in Korea—are engineered for ultra-precision and durability in critical defense and aerospace applications. In addition to belt-driven, built-in motor, hydrostatic, and hydrodynamic types widely used in semiconductor and precision equipment, our spindles are customized to deliver the exact speed and power output required by customers. With over 25 years of expertise in repairing and retrofitting leading Japanese, German, and Swiss brands such as TOYO, KOYO, OKUMA, GMN, and Fischer, and with multiple proprietary patents including joint developments with Schaeffler Korea, ORSKOREA ensures proven reliability. These spindles are ideal for machining high-value defense components such as armored vehicle gears, drone actuators, aircraft engine parts, multispectral sensor housings, and advanced optical or communication devices, supporting the competitiveness of both defense and civilian manufacturers.
Screw external/internal thread grinding machine(SGTE .SGTI)
ORSKOREA
ORSKOREA’s thread grinding machines are designed for high-precision machining of both internal and external threads, covering a wide range of thread profiles and dimensions. These machines are critical for producing aerospace fasteners, defense system parts, precision ball screws, and other components where accuracy and durability are vital.
Key Advantages
• CNC Control: 4-axis (SGTE) and 5-axis (SGTI) for complex thread profiles
• High-rigidity structure minimizing vibration and thermal distortion
• Built-in dressing and balancing units for consistent quality
By shortening processes and improving efficiency, ORSKOREA’s thread grinders reduce costs while enabling high-value, high-accuracy production. They also serve as advanced domestic alternatives to imported machines, strengthening localization and export competitiveness.
Key Advantages
• CNC Control: 4-axis (SGTE) and 5-axis (SGTI) for complex thread profiles
• High-rigidity structure minimizing vibration and thermal distortion
• Built-in dressing and balancing units for consistent quality
By shortening processes and improving efficiency, ORSKOREA’s thread grinders reduce costs while enabling high-value, high-accuracy production. They also serve as advanced domestic alternatives to imported machines, strengthening localization and export competitiveness.
Universal cylindrical grinding machines(SGU35)
ORSKOREA
ORSKOREA’s cylindrical grinding machines are engineered to deliver superior surface quality and tight tolerances for high-value parts. They are widely used in aerospace, defense, automotive, medical, and electronics industries for components that demand both strength and precision—such as engine shafts, landing gear parts, gears, and bearings.
Key Advantages
• Handles diverse, small-batch productions with consistent repeatability
• Exceptional dimensional precision for tight-tolerance parts
• Supports tapered and curved surface grinding
• Flexible workpiece capacity with swing up to 350 mm
• Smooth table movement with low noise and vibration for stable operation
By combining precision, versatility, and long-term reliability, ORSKOREA’s cylindrical grinders provide manufacturers with the performance needed to meet mission-critical requirements.
Key Advantages
• Handles diverse, small-batch productions with consistent repeatability
• Exceptional dimensional precision for tight-tolerance parts
• Supports tapered and curved surface grinding
• Flexible workpiece capacity with swing up to 350 mm
• Smooth table movement with low noise and vibration for stable operation
By combining precision, versatility, and long-term reliability, ORSKOREA’s cylindrical grinders provide manufacturers with the performance needed to meet mission-critical requirements.
People
Gyuhyun SHIM
ORSKOREA
Junior Mechanical Engineer
Irene(Jaemin) KIM
ORSKOREA
AI Specialist
Lidia (Soeyeong) SHIM
ORSKOREA
Strategic Business Manager
Seokbeom KANG
ORSKOREA
Junior Production Manager
Seonghyeon SON
ORSKOREA
Marketing Specialist
Yasin ÖZDEMIR
ORSKOREA
Global Sales Representative
Youjin SHIM
ORSKOREA
Marketing Specialist
Description
[What Is an Internal Thread Grinding Machine?]
An internal thread grinding machine is a specialized machine designed to precisely grind internal threads inside components. Compared to external thread grinding, internal thread grinding is far more demanding in terms of machining conditions and precision, requiring advanced technology and highly stable equipment.
Internal thread grinding Machines are mainly used for grinding fastener components in the aerospace and defense sectors, reducer components used in humanoid robots, and ball screws, which are experiencing growing demand in the automotive industry.
[ORSKOREA SGTI-80: A New Standard in Internal Thread Grinding]
The SGTI-80 is ORSKOREA’s independently developed high-precision internal thread grinding machine, designed as an optimal solution for domestic and global precision part manufacturers.
Key Features:
- 5-axis servo control system enabling precise grinding of complex thread profiles
- High-rigidity structure minimizing vibration and thermal distortion
- Built-in automated dressing and balancing units
- High-speed table feed system maximizing productivity
- Dual-process capability allowing two operations on a single machine, improving efficiency and reducing costs
An internal thread grinding machine is a specialized machine designed to precisely grind internal threads inside components. Compared to external thread grinding, internal thread grinding is far more demanding in terms of machining conditions and precision, requiring advanced technology and highly stable equipment.
Internal thread grinding Machines are mainly used for grinding fastener components in the aerospace and defense sectors, reducer components used in humanoid robots, and ball screws, which are experiencing growing demand in the automotive industry.
[ORSKOREA SGTI-80: A New Standard in Internal Thread Grinding]
The SGTI-80 is ORSKOREA’s independently developed high-precision internal thread grinding machine, designed as an optimal solution for domestic and global precision part manufacturers.
Key Features:
- 5-axis servo control system enabling precise grinding of complex thread profiles
- High-rigidity structure minimizing vibration and thermal distortion
- Built-in automated dressing and balancing units
- High-speed table feed system maximizing productivity
- Dual-process capability allowing two operations on a single machine, improving efficiency and reducing costs
