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FGM1250 CNC Gear Form Grinding Machine
FGM1250 CNC gear form grinding machine is a precision metal-cutting machine mainly used for grinding high precision cylindrical gears in heavy-duty machinery transmission, suitable for industries such as locomotive, shipping, chemical industry.
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Technical parameters of FGM1250 CNC Gear Form Grinding Machine
Applications of FGM1250 CNC Gear Form Grinding Machine
FGM1250 CNC gear form grinding machine is a precision metal-cutting machine mainly used for grinding high precision cylindrical gears in heavy-duty machinery transmission, suitable for industries such as metallurgy, mine, locomotive, shipping, chemical industry, generating equipment, military, aircraft and spacecraft etc. The form grinding principle, i.e. the section shape of grinding wheel is modified to engage with tooth space, so form grinding can be carried out. Movements and operations of the machine are simple, characterized high machining accuracy, high efficiency, excellent reliability, good stability, high automation, full CNC, strong applicability, various machining objects, and flexible gear modification, etc.
Features of FGM1250 CNC Gear Form Grinding Machine
1. In order to meet the high accuracy and rigidity requirements on machine movement and supporting, each bearing axis (radial movement axis X and carriage movement axis Z of the column, rotation axis C of the circle worktable) employs hydrostatic guideway, which reduces creep and lag when linear rolling guideway bears big loads. The positioning accuracy, especially the dynamic moving accuracy is greatly improved.
2. FGM1250 employs constant flow hydrostatic system. The principle is: hydrostatic pump station supplies constant flow hydrostatic oil to each cavity regardless of the load within allowable design range of the machine. Two-stage filtering operation is employed to guarantee the cleanliness of hydrostatic oil during the oil returning process. The hydrostatic pump uses Vogel multi-points gear pump with correct and stable flow. Hydrostatic oil tank employs constant oil temperature control system that can refrigerate and heat, which improve the stability.
3. Other moving guideways employ SCHNEEBERGER high accuracy rolling needle type linear guideway.
4. CNC axes employ fully closed-loop control, and the measuring feedback devices of every axis adopt HEIDENHAIN high precision gratings. CNC system employs NUM1050 servo system with higher accuracy and faster calculation speed, and anti-interruption capability is greatly improved.
5. Small screw pitch leadscrew of 2mm are employed in the dresser to improve motor speed, increase reduction ratio and decrease the moving error of servo motor, reduce the effect on mechanical moving accuracy produced by electric system error and improve moving accuracy of dresser at the same time.
6. Anti-backlash mechanism of circle worktable adopts single worm and hydraulic motor with adjustable force.
7. Random measuring system is supplied with the machine for the convenient adjustment and measurement.
| Model | Unit | FGM1250 |
| CNC system | NUM1050 | |
| Workpiece outer diameter | mm | Φ220-1250 (8.7-49”) (max 1500 (59”)) |
| Workpiece module | mm | 2-20 (max 25) |
| No. of teeth | Unlimited | |
| Max teeth width (spur gear) | mm | 710 (28”) |
| Max helix angle | degree | ±35 |
| Max workpiece weight | kg | 10000 |
| Diameter of worktable | mm | Φ960 (38”) |
| Height of worktable | mm | 1110 (44”) |
| Diameter of grinding wheel | mm | Φ300-400 (12-16”) |
| Max thickness of grinding wheel | mm | 63 (2.5”) |
| Speed of grinding wheel | rpm | 2200 |
| Periphery speed of grinding wheel | m/s | 34.5-46.8 |
| Distance between tailstock and worktable | mm | 830-1330 |
| Power of grinding apparatus | kW | 20 |
Applications of FGM1250 CNC Gear Form Grinding Machine
FGM1250 CNC gear form grinding machine is a precision metal-cutting machine mainly used for grinding high precision cylindrical gears in heavy-duty machinery transmission, suitable for industries such as metallurgy, mine, locomotive, shipping, chemical industry, generating equipment, military, aircraft and spacecraft etc. The form grinding principle, i.e. the section shape of grinding wheel is modified to engage with tooth space, so form grinding can be carried out. Movements and operations of the machine are simple, characterized high machining accuracy, high efficiency, excellent reliability, good stability, high automation, full CNC, strong applicability, various machining objects, and flexible gear modification, etc.
Features of FGM1250 CNC Gear Form Grinding Machine
1. In order to meet the high accuracy and rigidity requirements on machine movement and supporting, each bearing axis (radial movement axis X and carriage movement axis Z of the column, rotation axis C of the circle worktable) employs hydrostatic guideway, which reduces creep and lag when linear rolling guideway bears big loads. The positioning accuracy, especially the dynamic moving accuracy is greatly improved.
2. FGM1250 employs constant flow hydrostatic system. The principle is: hydrostatic pump station supplies constant flow hydrostatic oil to each cavity regardless of the load within allowable design range of the machine. Two-stage filtering operation is employed to guarantee the cleanliness of hydrostatic oil during the oil returning process. The hydrostatic pump uses Vogel multi-points gear pump with correct and stable flow. Hydrostatic oil tank employs constant oil temperature control system that can refrigerate and heat, which improve the stability.
3. Other moving guideways employ SCHNEEBERGER high accuracy rolling needle type linear guideway.
4. CNC axes employ fully closed-loop control, and the measuring feedback devices of every axis adopt HEIDENHAIN high precision gratings. CNC system employs NUM1050 servo system with higher accuracy and faster calculation speed, and anti-interruption capability is greatly improved.
5. Small screw pitch leadscrew of 2mm are employed in the dresser to improve motor speed, increase reduction ratio and decrease the moving error of servo motor, reduce the effect on mechanical moving accuracy produced by electric system error and improve moving accuracy of dresser at the same time.
6. Anti-backlash mechanism of circle worktable adopts single worm and hydraulic motor with adjustable force.
7. Random measuring system is supplied with the machine for the convenient adjustment and measurement.
Features of FGM1250 CNC Gear Form Grinding Machine
1. In order to meet the high accuracy and rigidity requirements on machine movement and supporting, each bearing axis (radial movement axis X and carriage movement axis Z of the column, rotation axis C of the circle worktable) employs hydrostatic guideway, which reduces creep and lag when linear rolling guideway bears big loads. The positioning accuracy, especially the dynamic moving accuracy is greatly improved.
2. FGM1250 employs constant flow hydrostatic system. The principle is: hydrostatic pump station supplies constant flow hydrostatic oil to each cavity regardless of the load within allowable design range of the machine. Two-stage filtering operation is employed to guarantee the cleanliness of hydrostatic oil during the oil returning process. The hydrostatic pump uses Vogel multi-points gear pump with correct and stable flow. Hydrostatic oil tank employs constant oil temperature control system that can refrigerate and heat, which improve the stability.
3. Other moving guideways employ SCHNEEBERGER high accuracy rolling needle type linear guideway.
4. CNC axes employ fully closed-loop control, and the measuring feedback devices of every axis adopt HEIDENHAIN high precision gratings. CNC system employs NUM1050 servo system with higher accuracy and faster calculation speed, and anti-interruption capability is greatly improved.
5. Small screw pitch leadscrew of 2mm are employed in the dresser to improve motor speed, increase reduction ratio and decrease the moving error of servo motor, reduce the effect on mechanical moving accuracy produced by electric system error and improve moving accuracy of dresser at the same time.
6. Anti-backlash mechanism of circle worktable adopts single worm and hydraulic motor with adjustable force.
7. Random measuring system is supplied with the machine for the convenient adjustment and measurement.
1. In order to meet the high accuracy and rigidity requirements on machine movement and supporting, each bearing axis (radial movement axis X and carriage movement axis Z of the column, rotation axis C of the circle worktable) employs hydrostatic guideway, which reduces creep and lag when linear rolling guideway bears big loads. The positioning accuracy, especially the dynamic moving accuracy is greatly improved.
2. FGM1250 employs constant flow hydrostatic system. The principle is: hydrostatic pump station supplies constant flow hydrostatic oil to each cavity regardless of the load within allowable design range of the machine. Two-stage filtering operation is employed to guarantee the cleanliness of hydrostatic oil during the oil returning process. The hydrostatic pump uses Vogel multi-points gear pump with correct and stable flow. Hydrostatic oil tank employs constant oil temperature control system that can refrigerate and heat, which improve the stability.
3. Other moving guideways employ SCHNEEBERGER high accuracy rolling needle type linear guideway.
4. CNC axes employ fully closed-loop control, and the measuring feedback devices of every axis adopt HEIDENHAIN high precision gratings. CNC system employs NUM1050 servo system with higher accuracy and faster calculation speed, and anti-interruption capability is greatly improved.
5. Small screw pitch leadscrew of 2mm are employed in the dresser to improve motor speed, increase reduction ratio and decrease the moving error of servo motor, reduce the effect on mechanical moving accuracy produced by electric system error and improve moving accuracy of dresser at the same time.
6. Anti-backlash mechanism of circle worktable adopts single worm and hydraulic motor with adjustable force.
7. Random measuring system is supplied with the machine for the convenient adjustment and measurement.
Technical parameters of FGM1250 CNC Gear Form Grinding Machine
| Model | Unit | FGM1250 |
| CNC system | NUM1050 | |
| Workpiece outer diameter | mm | Φ220-1250 (8.7-49”) (max 1500 (59”)) |
| Workpiece module | mm | 2-20 (max 25) |
| No. of teeth | Unlimited | |
| Max teeth width (spur gear) | mm | 710 (28”) |
| Max helix angle | degree | ±35 |
| Max workpiece weight | kg | 10000 |
| Diameter of worktable | mm | Φ960 (38”) |
| Height of worktable | mm | 1110 (44”) |
| Diameter of grinding wheel | mm | Φ300-400 (12-16”) |
| Max thickness of grinding wheel | mm | 63 (2.5”) |
| Speed of grinding wheel | rpm | 2200 |
| Periphery speed of grinding wheel | m/s | 34.5-46.8 |
| Distance between tailstock and worktable | mm | 830-1330 |
| Power of grinding apparatus | kW | 20 |
Applications of FGM1250 CNC Gear Form Grinding Machine
FGM1250 CNC gear form grinding machine is a precision metal-cutting machine mainly used for grinding high precision cylindrical gears in heavy-duty machinery transmission, suitable for industries such as metallurgy, mine, locomotive, shipping, chemical industry, generating equipment, military, aircraft and spacecraft etc. The form grinding principle, i.e. the section shape of grinding wheel is modified to engage with tooth space, so form grinding can be carried out. Movements and operations of the machine are simple, characterized high machining accuracy, high efficiency, excellent reliability, good stability, high automation, full CNC, strong applicability, various machining objects, and flexible gear modification, etc.
FGM1250 CNC gear form grinding machine is a precision metal-cutting machine mainly used for grinding high precision cylindrical gears in heavy-duty machinery transmission, suitable for industries such as metallurgy, mine, locomotive, shipping, chemical industry, generating equipment, military, aircraft and spacecraft etc. The form grinding principle, i.e. the section shape of grinding wheel is modified to engage with tooth space, so form grinding can be carried out. Movements and operations of the machine are simple, characterized high machining accuracy, high efficiency, excellent reliability, good stability, high automation, full CNC, strong applicability, various machining objects, and flexible gear modification, etc.
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Knee Type Milling Machine: Precision Versatility for Industrial Manufacturing
What is a Knee Type Milling Machine?
A knee type milling machine is a fundamental machine tool distinguished by its vertically adjustable worktable mounted on a "knee" casting. This knee moves precisely up and down a fixed column via a screw mechanism, enabling accurate Z-axis positioning crucial for diverse milling operations.
Working Principle
The core principle involves a rotating milling cutter removing material from a workpiece secured to the table. The adjustable knee mechanism allows controlled vertical movement (Z-axis), while the table provides longitudinal (X-axis) and transverse (Y-axis) travel. This 3-axis control facilitates complex machining of flat, angular, and contoured surfaces.
Key Applications
- Tool & Die Making: Precision molds, jigs, fixtures
- Prototyping: Rapid part development
- Maintenance Shops: Equipment repair & part fabrication
- General Machining: Slotting, drilling, facing, keyway cutting
- Aerospace & Automotive: Component manufacturing
Distinctive Features & Advantages
- Vertical Adjustability: Knee movement enables quick workpiece height changes
- Rigid Construction: Robust cast iron frame ensures stability
- Manual & CNC Options: Traditional control or computer numerical precision
- Turret Design (Common): Swiveling milling head for multi-angle machining
- Wide Workpiece Compatibility: Handles various sizes and shapes
Primary Classifications
- Vertical Knee Mill: Spindle axis perpendicular to table (most common)
- Horizontal Knee Mill: Spindle axis parallel to table (for heavy stock removal)
- Universal Knee Mill: Table swivels for complex angular cuts
- Turret Mill: Head rotates on turret for flexible positioning
Main Components
- Base & Column: Primary support structure
- Knee: Vertically moving saddle supporting the table
- Saddle & Table: Hold and position the workpiece (X/Y axes)
- Milling Head: Houses spindle, motor, and quill (Z-axis)
- Arbor/Spindle: Rotating shaft holding cutting tools
- Controls: Manual handwheels or CNC interface
Evolution & Industry Significance
Since their development in the late 19th century, knee-and-column mills revolutionized machining. The iconic Bridgeport design (1938) popularized the turret style. While CNC machining centers dominate high-volume production, knee mills remain indispensable for flexibility, ease of use, and cost-effectiveness in job shops, schools, and repair facilities worldwide.
Fortune Pacific: Your Knee Mill Solution
At Fortune Pacific, we engineer durable, high-precision knee type milling machines for demanding applications. Explore our range of vertical mills, horizontal mills, and CNC-ready models designed to enhance your workshop's capabilities. Discover the ideal machine for your metalworking, prototyping, or toolmaking needs.
Keywords: Knee Type Milling Machine, Vertical Milling Machine, Horizontal Mill, Turret Mill, Knee-and-Column Mill, Milling Machine for Sale, Industrial Milling, Metalworking Equipment, Workshop Machinery, CNC Mill, Toolroom Mill, Precision Machining, Fortune Pacific, Machine Tool Manufacturer.