Introduction

OFA 75 CNC 6 is a high-performance CNC gear hobbing machine designed for the precise manufacturing of a wide range of geared components. The machine is suitable for machining spur gears with straight and helical teeth, worm gears, chain wheels, spline shafts and other gear profiles produced by the hobbing process.

Thanks to its modern machine design, six controlled CNC axes and advanced control technology, the OFA 75 CNC 6 provides excellent machining accuracy, high productivity and reliable long-term operation. The machine is suitable for both job-shop production and high-volume serial manufacturing, making it an ideal solution for gearbox manufacturers, power transmission suppliers and general engineering companies.

Gear Cutting Capabilities

The OFA 75 CNC 6 is designed for highly accurate gear manufacturing across a wide range of applications. Its flexibility allows manufacturers to produce both standard and specialized gear components with excellent repeatability.

The machine is capable of producing:

• spur gears with straight teeth,
• spur gears with helical teeth,
• chain wheels,
• worm gears,
• gears with lead modification,
• spline shafts,
• special gear profiles generated by the hobbing process.

As a result, manufacturers can consolidate multiple gear-cutting operations on a single machine while maintaining high production efficiency.

Precision and Productivity

The machine incorporates a modern design with backlash elimination in both the hob slide and worktable assemblies. This significantly improves machining stability and allows higher cutting performance compared to conventional gear hobbing machines.

The OFA 75 CNC 6 supports:

• machining of hardened gears,
• high-speed machining of unhardened gears,
• carbide tooling applications,
• precision finishing operations,
• demanding production environments.

Consequently, users benefit from shorter production cycles, improved surface quality and lower manufacturing costs.

Machine Construction

The rigid machine structure has been engineered to provide excellent vibration damping and long-term geometric stability. The design minimizes deformation under cutting loads and ensures stable machining conditions during extended operation.

Key construction benefits include:

• high mechanical rigidity,
• precise axis positioning,
• long service life,
• stable thermal behavior,
• reliable operation during continuous production.

Thanks to these characteristics, the machine consistently delivers accurate gear geometry and excellent tooth profile quality.

Six Controlled CNC Axes

A major advantage of the OFA 75 CNC 6 is its six-axis CNC configuration, which enables precise control of all machining movements required for complex gear generation.

The six-axis concept provides:

• greater machining flexibility,
• precise gear generation,
• improved productivity,
• reduced setup times,
• higher process reliability.

This configuration allows efficient production of both standard gears and more complex geared components with demanding specifications.

CNC Control System and Drives

The machine is equipped with the advanced SINUMERIK 840D sl CNC control system and Siemens drive technology. This combination ensures accurate synchronization of machine movements and reliable process control.

The CNC system offers:

• advanced gear machining functions,
• high positioning accuracy,
• intuitive programming,
• process monitoring,
• diagnostic capabilities,
• efficient production management.

As a result, operators can optimize machining parameters while maintaining consistent production quality.

Machining of Spur and Helical Gears

One of the primary applications of the OFA 75 CNC 6 is the production of spur and helical gears for industrial transmission systems.

The machine enables:

• high-precision tooth profile generation,
• excellent repeatability,
• stable machining conditions,
• efficient serial production.

This makes the machine particularly suitable for manufacturers of gearboxes, industrial drives and transmission components.

Production of Worm Gears and Spline Shafts

In addition to conventional gears, the machine can also manufacture worm gears and spline shafts used in specialized mechanical systems.

This capability allows manufacturers to expand production capacity and produce a broader range of geared components using a single machine platform.

Applications include:

• worm gear drives,
• transmission systems,
• machine tool components,
• industrial power transmission equipment,
• precision engineering products.

Job-Shop and Serial Production

The flexibility of the OFA 75 CNC 6 allows it to perform equally well in both prototype and mass production environments.

The machine is suitable for:

• single-piece production,
• prototype manufacturing,
• small-batch production,
• medium-volume production,
• high-volume serial manufacturing.

Therefore, it provides manufacturers with a highly adaptable gear-cutting solution capable of meeting changing production requirements.

Productivity and Reliability

By combining advanced CNC technology, a rigid machine structure and six controlled axes, the OFA 75 CNC 6 delivers a productive and reliable manufacturing platform.

Benefits include:

• high machining accuracy,
• consistent product quality,
• excellent repeatability,
• long-term operational reliability,
• efficient tool utilization,
• reduced production costs.

These advantages help manufacturers improve competitiveness while maintaining demanding quality standards.

Typical Applications

The OFA 75 CNC 6 is commonly used for the production of:

• transmission gears,
• spur gears,
• helical gears,
• worm gears,
• chain wheels,
• spline shafts,
• gearbox components,
• industrial drive components,
• specialized geared parts.

Its versatility makes it suitable for a wide range of industries including power transmission, automotive supply, heavy engineering and industrial equipment manufacturing.

New Machine Supply and Technical Support

We provide complete support for new machine deliveries, including:

• machine selection assistance,
• technical consultation,
• project support,
• installation supervision,
• operator training,
• technical documentation,
• long-term technical support.

Our specialists can help identify the optimal gear manufacturing solution based on required capacity, gear size, accuracy level and production volume.