Gleason Phoenix 280G
Key Specifications
Max Workpiece ⌀
axes
max module
max face width
cutting process
cutting method
Overview
The Gleason Phoenix 280G is a CNC bevel gear generating machine designed for high-volume production of spiral bevel and hypoid gears up to 280 mm (11 in) workpiece diameter. It is the core platform of Gleason's Phoenix series, which established the standard for dry-cut face-milling bevel gear production in the automotive industry. The 280G carries on that legacy with a fully integrated, thermally stable machine architecture optimized for automotive axle and differential bevel gear manufacturing.
The Phoenix 280G uses Gleason's face-milling bevel gear process — either the traditional completing method or the Gleason FORMATE single-cycle process — to generate the complex tooth geometry of spiral bevel and hypoid gears in a single setup. Maximum workpiece diameter of 280 mm covers the dominant range of automotive passenger car and light truck axle ring gears, making the 280G Gleason's highest-volume automotive bevel gear platform.
The machine is designed around dry cutting with solid carbide stick blades or inserted cutter heads. Eliminating cutting fluid reduces operating cost, simplifies chip handling, and avoids thermal distortion from coolant temperature variation — a critical advantage for high-volume automotive production where dimensional consistency across thousands of parts per shift is required. The machine's closed-frame structure and polymer concrete base provide the stiffness to maintain bevel gear quality across dry-cutting conditions.
Gleason's GEMS (Gleason Expert Manufacturing System) software controls the Phoenix 280G, providing integrated cutting, inspection, and correction workflows. On-machine probing enables automatic closed-loop correction of tooth geometry, and integration with Gleason 350GMS measuring machines supports full SPC-based gear quality management across automotive production cells. New Phoenix 280G machines are typically priced in the $1,200,000–$1,800,000 range.
Full Specifications
| Parameter | Value |
|---|---|
| Axes | 6 (X, Y, Z, A, B, C synchronized CNC) |
| Max Workpiece Diameter | 280 mm (11 in) |
| Max Module | 8 mm (DP 3.2) |
| Max Face Width | 70 mm (2.76 in) |
| Cutting Process | Face-milling (completing or FORMATE single-cycle) |
| Cutting Method | Dry cutting with carbide stick blades or cutter heads |
| Workpiece Spindle Speed | Up to 1,000 RPM |
| Tool Spindle Speed | Up to 3,000 RPM |
| Machine Bed | Polymer concrete (Granitan) |
| CNC Control | Gleason GEMS on Siemens Sinumerik 840D sl |
| Automation Ready | Integrated gantry loader interface |
| Machine Dimensions | 4,200 x 2,600 x 2,800 mm (165 x 102 x 110 in) |
Specifications sourced from gleason.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 280 mm workpiece capacity covers the full range of automotive passenger car and light truck axle ring gears in a single high-production platform
- Dry-cutting process eliminates coolant costs, simplifies chip handling, and removes thermal variation from cutting fluid — critical for dimensional consistency in high-volume automotive production
- GEMS software integration with Gleason measuring machines enables closed-loop automated correction of bevel gear tooth geometry without operator intervention
- Polymer concrete base and closed-frame structure maintain cutting accuracy across multi-shift production without thermal drift common in cast iron machine structures
Limitations
- Dry cutting with carbide stick blades requires precise process parameter control — tool life is sensitive to cutting speed, feed, and workpiece material hardness variation
- Capital cost of $1.2M–$1.8M requires high-volume production justification; underutilized on low-volume or prototype bevel gear work
- Gleason GEMS software and Phoenix platform tooling are proprietary systems — shops must commit to Gleason's ecosystem for tooling, software, and service support
Best For
Frequently Asked Questions
01
The completing process cuts both the drive side and coast side of the bevel gear tooth in a single machine cycle, typically used for medium-to-high production volumes where optimized tooth geometry is required. The FORMATE process is a single-cycle method where the ring gear tooth slots are plunge-cut without generating motion, allowing faster cycle times at the cost of some flexibility in tooth geometry optimization. FORMATE is preferred for very high volume automotive ring gears where cycle time is the dominant cost driver.
02
Yes. The Phoenix 280G is specifically designed to produce both spiral bevel and hypoid gears. Hypoid gears — where the pinion axis is offset from the ring gear axis — are the standard configuration in automotive rear-axle differentials because the offset allows lower driveline tunnel height and improved gear contact. The Phoenix 280G's six-axis CNC kinematics accommodate the additional offset cutting geometry required for hypoid production.
03
The Phoenix 280G runs GEMS software that shares a common data format with Gleason's 350GMS and other Gleason measuring centers. Measured gear deviations from the 350GMS can be automatically fed back to the 280G's GEMS cutting controller as correction data, enabling closed-loop process control without manual operator interpretation. This integrated correction workflow is standard in automotive bevel gear production cells using Gleason equipment.
04
The Phoenix 280G is capable of producing AGMA class 11–12 (ISO 3 grade equivalent) bevel gears under production conditions with proper tooling setup and closed-loop correction. Automotive axle bevel gears typically require AGMA class 10–11, which the 280G achieves in high-volume production. Higher quality grades are achievable with reduced cutting parameters but are rarely required for automotive axle applications.
05
Cycle time depends on the number of teeth, module, face width, and the cutting process selected. For a typical automotive passenger car ring gear (approximately 40–48 teeth, module 3–4, 50–60 mm face width) using the FORMATE process, cycle times in the range of 90–150 seconds per part are achievable. Completing process cycle times are longer. Gleason applications engineers can provide cycle time estimates for specific gear designs.
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