Machine Comparison
Chiron 715 MT vs Chiron 831 MT
Chiron vs Chiron · Mill-Turn Machines
Summary
The Chiron 715 MT and Chiron 831 MT are both from Chiron's mill-turn machines lineup, making this a common upgrade or lineup decision for shops already invested in the Chiron ecosystem. These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. Both machines are proven performers in production environments and represent solid investments for shops in the market for a mill-turn machine.
Specifications Comparison
| Specification | Chiron 715 MT | Chiron 831 MT |
|---|---|---|
| Control | Siemens SINUMERIK 840D sl | Siemens SINUMERIK 840D sl |
| Max Workpiece Diameter | 300 mm (11.8 in) | 400 mm (15.7 in) ▲ |
| Axes | 5-axis simultaneous mill-turn | 5-axis simultaneous mill-turn |
| Spindle Configuration | Separate turning and milling spindles | Separate turning and milling spindles |
| Machining Type | Complete machining (mill-turn from bar or chuck) | Complete machining (mill-turn from bar or chuck) |
| Machine Design | STAMA heritage, rigid column architecture | STAMA heritage, rigid column architecture |
| Machine Bed | Cast iron | Cast iron |
| Bar Stock | Bar stock and chuck work capable | Bar stock and chuck work capable |
| Price Range | $550,000 - $800,000 ▲ | $650,000 - $950,000 |
Advantages
Chiron 715 MT
- More competitive pricing at $550,000 - $800,000 compared to $650,000 - $950,000
- Backed by Chiron's dealer and service network for parts and support
- Aerospace manufacturers producing shafts, spindles, and cylindrical components requiring complete milling and turning in one setup
Chiron 831 MT
- Superior max workpiece diameter at 400 mm (15.7 in) vs 300 mm (11.8 in)
- Backed by Chiron's dealer and service network for parts and support
- Aerospace manufacturers producing landing gear components, turbine housings, and structural parts requiring heavy turning and 5-axis milling
Verdict
This is a close matchup. The Chiron 715 MT and Chiron 831 MT trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.