Gleason Pfauter P 1200 G CNC Gear Wheel Grinding Machine – Year 2003
CNC System: Siemens
Maximum workpiece diameter: 1250mm
Maximum contour depth: 80mm
Maximum axial travel: 1300 mm
Worktable diameter: 800mm
Worktable hole diameter: 182mm
Specifications
Manufacturer Gleason Pfauter
Model P 1200 G
Year 2003
Condition Used
Gleason Pfauter P 1200 G CNC Gear Wheel Grinding Machine – Technical Evaluation (Year 2003)
1. Technical Evaluation Overview
The Gleason Pfauter P 1200 G is a CNC gear wheel grinding machine designed for the finishing of large-diameter gears. Based strictly on the provided information, the machine supports a maximum workpiece diameter of 1,250 mm and a maximum axial travel of 1,300 mm, positioning it within the heavy-duty gear grinding category.
The stated maximum contour depth of 80 mm indicates capability for grinding gear profiles with substantial tooth depth, although the applicable gear module range is not specified and must be verified. The worktable diameter of 800 mm and worktable bore of 182 mm define the mounting limits for fixtures and clamping systems.
The machine is equipped with a Siemens CNC system, but the exact control model, software version, and gear grinding-specific functions are not specified. No information is provided regarding grinding spindle power, wheel dimensions, dressing system, axis configuration, or achievable grinding accuracy. These omissions are critical and should be clarified before any technical conclusion is finalized.
2. What to Check Before Buying
Given the limited specification set, inspection should focus on the following areas:
Mechanical system:
Condition of the grinding spindle, including bearing noise, vibration, and thermal stability during operation.
Accuracy and smoothness of axial travel over the full 1,300 mm, particularly under load.
Wear condition of guideways and rotary axes associated with the worktable, especially considering large gear diameters.
Integrity and alignment of the worktable, including the 182 mm bore, to ensure concentricity during grinding.
Grinding and dressing equipment:
Type, condition, and remaining life of the grinding wheel spindle and dressing unit, if installed.
Verification of contour depth capability (80 mm) under real grinding conditions.
Confirmation of coolant delivery and filtration systems, which are critical in gear grinding applications.
CNC and electrical system:
Operational status of the Siemens CNC, including axis control stability, servo response, and alarm history.
Availability of machine-specific software, gear grinding cycles, and parameter backups.
Condition of electrical cabinets, drives, and cooling systems, particularly relevant for a machine built in 2003.
3. Typical Industrial Applications
Based on the stated dimensions and configuration, this machine is technically suitable for:
Finish grinding of large spur and helical gears within a 1,250 mm diameter range, subject to confirmation of module capacity.
Gear production or refurbishment in heavy industry sectors such as power transmission, energy, and large mechanical systems.
Precision finishing operations where controlled axial travel and stable worktable support are required for large gear wheels.
Specific gear types, accuracy classes, and production suitability cannot be confirmed without additional technical data.
4. Common Risks in Used Machines
For used CNC gear grinding machines of this size and age, typical risks include:
Grinding spindle wear, which can directly affect surface finish and profile accuracy.
Rotary axis and table wear, particularly if the machine has been used for large, heavy workpieces.
CNC obsolescence risks, depending on the exact Siemens control generation and software support status.
Incomplete documentation, such as missing grinding charts, software options, or electrical diagrams, which can limit effective operation.
5. Maintenance and Service Considerations
Maintenance requirements cannot be defined precisely due to missing service history and technical details. From a general technical standpoint:
Regular monitoring of spindle condition, lubrication systems, and axis accuracy is essential.
Grinding and dressing components require close inspection due to their direct impact on gear quality.
CNC data backups, including machine parameters and application-specific cycles, should be secured prior to operation.
Any long-term service planning should be based on an on-site inspection and functional testing rather than assumptions about maintenance intervals or spare part availability.
