At Ecotech Machine Tool, we are proud to provide the North American market with Robbi Group’s line of high-performance honing machines. Engineered for the most demanding industrial environments, these systems combine Robbi’s legendary Italian craftsmanship with Ecotech’s dedication to local technical support and application expertise. Whether your operations require the extreme capacity of a horizontal machine or the high-accuracy tolerances of a vertical system, we offer a tailored solution built for stability, longevity, and maximum productivity.
Applications & Industrial Use
Honing is a critical final machining process used to create precise geometric forms and surface finishes in internal bores. Working alongside Ecotech's application experts, you can leverage Robbi technology to refine the internal diameter of cylindrical parts, correcting errors in roundness, straightness, and taper introduced during previous machining stages.
Common Workpieces & Functions:
- Hydraulic & Pneumatic Cylinders: Achieving the mirror-like finish and perfect geometry required for high-pressure seals.
- Engine Blocks & Liners: Creating the specific cross-hatch pattern necessary for oil retention and optimal piston ring performance.
- Heavy Machinery Barrels: Honing long-stroke industrial tubes and high-tolerance piping.
- Small Bore Components: Refining small, high-precision parts where strict straightness and roundness are non-negotiable.
Key Industries Served:
- Aerospace & Defense: Manufacturing of landing gear components, actuators, and high-performance engine parts.
- Oil & Gas: Finishing of drill pipes, valves, and downhole tools that operate in extreme environments.
- Automotive: Production and reconditioning of engine cylinders, connecting rods, and transmission parts.
- Construction & Mining: Maintenance and manufacturing of heavy-duty hydraulic rams for earthmoving equipment.
Horizontal Honing Machines: LYOR Series
The LYOR series horizontal honing machines are distinguished by their exceptional rigidity and power. Designed for processing long cylinders and heavy components, these machines utilize advanced mechanical systems to ensure consistent finishes across the entire bore.
Key Features:
- Recirculating Ball Screw: Precision movement of the honing head via a recirculating ball screw for smooth, accurate stroking.
- High-Power Spindle: Spindle transmission features a 2-speed gearbox with ground and hardened gears to transmit maximum torque.
- Intuitive Control: A 7" color touch-screen interface allows operators to program cycles and monitor working data in real-time.
- Vector Inverter Control: Three-phase electric motors with forced ventilation ensure constant speed and performance under varying loads.
Specialized Versions:
- LYOR M: Designed for simplicity and efficiency, components are clamped on prisms while the honing head rotates and strokes inside.
- LYOR S (Counter-Rotation): Features a second spindle that rotates the workpiece in the opposite direction of the honing head. This significantly improves roundness and straightness, especially on small-diameter bores, and ensures uniform oil distribution for better heat dispersion.
Vertical Honing Machines: YUM Series
The YUM series offers a vertical approach to honing, providing distinct advantages for specific workpiece geometries and high-precision stock removal.
Key Benefits:
- Superior Roundness: The vertical orientation naturally assists in maintaining geometric accuracy.
- Efficient Stock Removal: Capable of removing significant material quickly while maintaining tight tolerances.
- Automatic Discontinuity Detection: The system detects points of lower stress (smaller diameters) and automatically adjusts the cycle to ensure a perfectly uniform bore.
- Precision Reverse: Guaranteed 0.1mm precision on head movement reversal for blind holes or specific shoulder requirements.
Specialized Honing Tooling & Accessories
Ecotech Machine Tool provides a comprehensive range of Robbi-manufactured tooling to ensure your machine performs at its peak.
- Honing Tool Series:
- TLY Series: Optimized for use with the YUM Vertical machines.
- TMY & TOY Series: Versatile tools compatible with both Horizontal (LYOR) and Vertical (YUM) machines.
- Workholding & Support:
- Hydraulic Steady Rests: Self-centering, hydraulic closing rests for heavy-duty support of long cylinders (LYOR S only).
- Clamping Prisms: Manual or hydraulic closing prisms for quick and secure workpiece setup.
- Coolant Management: Options for magnetic cleaners, paper roll cleaners, or combined systems to maintain abrasive efficiency.
Advanced Technology & Controls
Every Robbi honing machine supplied by Ecotech is equipped with a modern PLC-managed operator panel that simplifies complex processes:
- Precision Cycle Management: Separate settings for Roughing, Finishing, and Super-finishing strokes.
- Automatic Stone Pressure: Infinitesimal regulation of stone pressure ensures the perfect finish and compensates for stone wear.
- Real-Time Diagnostics: Monitor machine status, alarm messages, and diagrams of the honing head spindle power band during the stroke.
- Safety Features: Automatic stop in case of transmission belt breakage and enclosed electric cabinets (IP 55 protection).
General Information
About The Robbi Group
Robbi is an industrial machine manufacturer based out of Italy and since 1936. Robbi uses materials and high-quality components to deliver the utmost precision. Most of their mechanical components are created in their machine shop.
Their company mission is to design and manufacture precision machine tools, technologically advanced, reliable, safe, easy to use, and “tailor-made” for each customer.
