CNC Internal Grinder
- Max. grinding dia. 500mm
- Max. grinding depth 450mm
- Max. rotating dia. 725mm
OTURN CNC internal grinding machine is a high-precision tool crafted for machining the inner surfaces of cylindrical parts. It accommodates a variety of internal profiles, including cylindrical bores, tapered holes, and stepped profiles. Our machines manufacture parts with tight dimensional tolerances and presenting smooth surface.
The CNC internal grinding machine works effectively with many materials, including steel, aluminum alloys, titanium alloys, stainless steel, ceramics, plastics, and advanced hybrid materials. It offers efficient grinding performance across different levels of hardness and material complexities.
Our machines are commonly applied in many industries, such as aerospace, automotive, medical device manufacturing, mold making, and precision parts industries. This CNC internal grinder processes important parts including flanges, spindle housings, rotor shafts, and bushings with accuracy.
Ready to take your grinding operations to the next level? Get in touch now for a personalized consultation and find the perfect CNC internal grinding solution for your business.
High-Precision Inner Bore Grinding
Equipped with a high-stiffness spindle and sophisticated CNC systems, this machine attains micron-level accuracy. It is well suited for bearings, hydraulic parts, vehicle-related elements, and aerospace uses where exact concentricity and excellent surface finish are critical.
Versatile Workpiece Compatibility
Our machine can process straight bores, tapered bores, stepped bores, and multi-segment bores with flexible tooling setups, meeting the needs of various production requirements.
Superior Surface Finish
The CNC internal grinding machine performs high-speed grinding with stable surface speed, which helps deliver smooth finishes, accurate roundness, and uniform results throughout extensive production runs.
Automation-Ready Design
Our CNC internal grinding machine features automatic loading and unloading, real-time measurement during processing, and self-adjusting compensation functions, all setted for improving the continuousness during operation and boosting output.
Robust & Stable Structure
The machine is built with a heavy-duty cast iron or mineral casting base, providing excellent vibration damping and thermal stability for long-term precision.
Easy Programming & Quick Changeover
With a user-friendly CNC interface, this internal grinding machine allows fast setup and smooth program transitions. It’s more efficient when switching between various workpieces.
The duration of CNC internal grinding varies greatly based on the design of the part, the material used, and the accuracy you needed. For simple bore finishing, the process might take just a few minutes at evert cycle. However, parts with complex internal geometries or demanding very strict tolerances may require several hours to manufacture, so that the surface quality and dimensions meet specifications.
There are several factors affect how long CNC internal grinding takes:
- Internal Geometry Details
Parts featuring stepped bores, tapered holes, or multi-section internal shapes which requires complex tool movements and careful processing. The grinder must complete each pass accurately to keep the bore concentric and round.
- Material Characteristics
The hardness of the material directly impacts grinding duration. Tough alloys, hardened steels, and ceramics need slower feed rates and several passes to avoid being overheated and maintain the correct dimensions.
- Bore Dimensions
Grinding larger or deeper bores takes more time due to the greater surface area and the challenge of operating without vibration inside the component.
- Surface Finish and Requirements of Precision
For applications that require very smooth surfaces or extremely tight tolerances, the grinder operates at lower speeds and performs extra spark-out cycles, which lengthens the process.
- Equipment Performance
Cycle times are affected by factors such as spindle power, machine rigidity, and automation level. Modern CNC internal grinders equipped with high-speed spindles, automatic wheel dressing, and in-process measurement can reduce times of cycle and deliver reliable results.
Generally, the time of internal grinding varies with part complexity, material type, finish needs, and capabilities of machine. Recognizing these factors allows manufacturers to better estimate production timing and manufacturer parts of consistent quality.
A CNC internal grinding machine specializes in finishing the inside surfaces of cylindrical components. It can manufacture parts with complex features such as forming precise bores, tapered openings, stepped contours, and various intricate internal details, ensuring excellent surface quality and dimensional accuracy.
The machine is capable of machining various materials that ranges from different types of steel and stainless steel to ceramics and plastics. It also works well with advanced hybrid materials like those reinforced with carbon fibers.
This equipment handles parts such as flanges, spindle and rotor shafts, housings, bushings, along with various high-precision elements commonly found in sectors including aviation, vehicle manufacturing, healthcare, and mold production.
Certainly. This CNC internal grinding machine can work on internal bores of varying dimensions and intricate shapes, such as cylindrical, tapered, stepped, and segmented profiles.
Our support covers equipment sales, expert installation, training for operators, assistance with applications, routine and condition-based maintenance, as well as providing spare parts and repair work which is aimed at maintaining optimal machine performance.



