The Engineering Behind the Micron

True precision cannot be assembled from outsourced parts. It must be created from the ground up. Okamoto is one of the world’s few machine tool builders with a fully integrated production system. We control every variable—from the metallurgy of the castings to the final hand-finishing of the slideways.

THE HARDWARE

In-House Spindle Manufacturing

The spindle is the heart of any grinder. We manufacture our own precision spindles and quill systems to ensure zero compromise.

  • Temperature Control: Our spindles are designed to minimize thermal expansion, often coupled with advanced cooling systems to maintain accuracy during long production runs.
  • Rigidity: Whether utilizing hydrodynamic bearings for heavy loads or high-speed ball bearings for precision work, our spindles are balanced to eliminate run-out.

Hand Scraping: Where Craftsmanship Beats Automation

In an era of linear guideways, Okamoto continues to invest in the traditional art of Kisage (Japanese, Hand Scraping) for our sliding surfaces. This labor-intensive process, performed by master craftsmen, is critical for “Total Precision.”

  • Oil Retention: The scraping process creates microscopic oil pockets on the guideway surface. This ensures perfect lubrication retention, preventing “stick-slip” phenomena and allowing for ultra-smooth movement.
  • Geometric Perfection: No machine can match the corrective ability of a human hand adjusting flatness to within micrometers. This results in perfect contact between moving parts.
  • Longevity: Hand-scraped slideways (V-V and V-Flat construction) offer superior load-bearing capacity and wear resistance compared to bolt-on linear rails.

High-Rigidity Castings from Our Own Foundries

Every Okamoto machine begins in our own foundries. Unlike manufacturers who purchase generic machine beds, we engineer our castings specifically for grinding applications.

  • Vibration Damping: We utilize high-grade, dense cast iron that naturally absorbs grinding vibrations, ensuring superior surface finishes.
  • Ribbed Construction: Our beds feature heavily ribbed internal structures that resist thermal distortion and twisting forces, even during heavy-duty creep feed grinding.
  • Stress Relieving: All castings undergo a rigorous natural seasoning and annealing process to eliminate internal stress before machining begins, guaranteeing long-term geometric stability.

THE SOFTWARE

Proprietary User Interface

While we utilize robust hardware foundations (such as Fanuc), the user interface is 100% Okamoto. We have transformed the complex world of G-code into intuitive, graphical interfaces.

  • Touchscreen Simplicity: Modern, high-resolution touch panels with customized layouts for grinding parameters.
  • Process Visualization: Real-time monitoring of grinding wheel position, load meters, and cycle status.

No G-Code Required

Our “Conversation Software” (featured in our ACC-CA, ACC-SA, and OGM series) allows operators to program complex grind cycles by simply entering data into dialogue boxes.

  • Step-by-Step Logic: The software asks for the workpiece dimensions, target material removal, and desired finish. The system then automatically calculates the optimal roughing, semi-finishing, and spark-out passes.
  • Complex Profiles Made Easy: For Form Grinders, our software includes pre-loaded shapes. Operators can combine shapes to create complex profiles without needing external CAD/CAM programming for standard operations.
  • Automatic Dressing: Dressing cycles are integrated into the workflow, automatically compensating for wheel wear to maintain dimensional accuracy.