GH1250 Gear Hobbing Machine
- GH1250 Gear Hobbing MachineDownload
| Model | Unit | GH1250 | GH1250 H | GH1250 P |
|---|---|---|---|---|
| Max workpiece diameter with/without rear column | mm | Φ1250/1000 (49/39”) |
Φ1250/1000 (49/39”) |
Φ1250/1000 (49/39”) |
| Max module | mm | 16 | 12 | 12 |
| Min tooth number | 12 | 12 | 12 | |
| Max worktable speed | r/min | 5 | 5 | 2.5 |
| Worktable diameter x hole diameter | mm | Φ950x200 (37x7.9”) |
Φ950x200 (37x7.9”) |
Φ950x200 (37x7.9”) |
| Hob speed/step | r/min | 16-125/7 | 24-187/7 | 16-125/7 |
| Distance between hob axis and worktable surface | mm | 200-730 (7.9-29”) |
200-730 (7.9-29”) |
200-730 (7.9-29”) |
| Central distance between hob axis and worktable | mm | 100-760 (3.9-30”) |
100-720 (3.9-28”) |
100-760 (3.9-30”) |
| Distance between tailstock center bore low end face and worktable surface | mm | 580-1000 (23-39”) |
580-1000 (23-39”) |
580-1000 (23-39”) |
| Max hob diameter and length | mm | Φ220x220 (8.7x8.7”) |
Φ230x220 (9.1x8.7”) |
Φ220x220 (9.1x8.7”) |
| Max hob head swivel angle | degree | ±60 | ±60 | ±60 |
| Total power / main motor power | kVA/kW | 22.75/15 | 22.75/15 | 22.75/15 |
| T-slot | 6xM20 | 6xM20 | 6xM20 | |
| Machine dimension (L x W x H) | mm | 3700x2100x2520 | 3700x2100x2520 | 3700x2100x2520 |
| Net weight / gross weight | kg | 15400/16600 | 15400/16600 | 15400/16600 |
Features
On the principle of continuous indexing, GH1250 gear hobbing machine is suitable to cut cylindrical spur and helical gears and sprockets under axial feed, or worm wheels by a worm wheel hob under radial feed. Feed of the worktable is manual. GH1250 is best suitable for mine, oil, ship, engineering mechanism industries for hobbing large gears.
GH1250 P precision gear hobbing machine is developed based on GH1250. GH1250 P is used for cutting high accuracy gears and worm wheel.
Used for cutting cylindrical hardened spur and helical gears etc.
Standard accessories
1. Hob arbor assembly: Φ32, 40, 50mm;
2. Change gears;
3. Tools for installation and adjustment;
Optional accessories
1. Hob arbor assemblies: Φ22, 27, 60mm;
2. Tangential hob head;
3. Column hoop and center;
4. Column raising;
5. Tool alignment device;
6. Chip conveyor;
1. Hob arbor assembly: Φ32, 40, 50mm;
2. Change gears;
3. Tools for installation and adjustment;
1. Hob arbor assemblies: Φ22, 27, 60mm;
2. Tangential hob head;
3. Column hoop and center;
4. Column raising;
5. Tool alignment device;
6. Chip conveyor;
On the principle of continuous indexing, GH1250 gear hobbing machine is suitable to cut cylindrical spur and helical gears and sprockets under axial feed, or worm wheels by a worm wheel hob under radial feed. Feed of the worktable is manual. GH1250 is best suitable for mine, oil, ship, engineering mechanism industries for hobbing large gears.
GH1250 P precision gear hobbing machine is developed based on GH1250. GH1250 P is used for cutting high accuracy gears and worm wheel.
Used for cutting cylindrical hardened spur and helical gears etc.
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.
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