Chiron 715 MT

$550,000 - $800,000 Updated 2025-03-15

Key Specifications

Max Spindle

20,000 rpm

Tool Capacity

176

Max Workpiece ⌀

300 mm (11.8 in)

Max Turn Length

1,000 mm

max workpiece length

1,000 mm (39.4 in)

axes

5-axis simultaneous mill-turn

Overview

The Chiron 715 MT is a 5-axis mill-turn machining center originally developed by STAMA, the German machine tool builder that Chiron Group acquired and integrated into its product portfolio. The STAMA heritage brings a distinct design philosophy focused on complete machining of complex parts from bar stock or chuck work, with heavy-duty turning capability paired with robust milling performance. The 715 MT handles workpieces up to 300 mm diameter and 1,000 mm length, making it one of the larger mill-turn platforms in the Chiron Group lineup.

The machine features a powerful main spindle for turning operations paired with a separate milling spindle for 5-axis simultaneous milling operations. This dual-spindle architecture — one for turning, one for milling — differs from single-spindle mill-turn machines that compromise between the two operations. The integrated tool store accommodates up to 176 tools, providing capacity for complex parts requiring extensive milling and turning tooling without manual intervention.

The 715 MT is designed for complete machining: parts go in as raw stock and come out finished, with all milling, turning, drilling, tapping, and threading operations completed in a single setup. This eliminates the accuracy errors introduced by re-clamping parts between machines and dramatically reduces production lead time. The machine handles both bar stock feeding and individual chuck work, providing flexibility across different production scenarios.

The STAMA-heritage design uses a rigid column architecture with high-performance ball-screw drives and a cast-iron machine bed for maximum stiffness during heavy turning operations. The control is Siemens SINUMERIK 840D sl. New 715 MT machines price between $550,000 and $800,000 depending on spindle options, tool magazine size, bar feeder, and automation configuration. The machine competes with the DMG Mori NTX 2500, Mazak Integrex i-300, and Okuma MULTUS B300. Used 715 MT units from 2016-2022 trade between $275,000 and $525,000.

Full Specifications

Parameter	Value
Max Workpiece Diameter	300 mm (11.8 in)
Max Workpiece Length	1,000 mm (39.4 in)
Axes	5-axis simultaneous mill-turn
Spindle Configuration	Separate turning and milling spindles
Tool Capacity	176
Machining Type	Complete machining (mill-turn from bar or chuck)
Machine Design	STAMA heritage, rigid column architecture
Machine Bed	Cast iron
CNC Control	Siemens SINUMERIK 840D sl
Bar Stock	Bar stock and chuck work capable
Max Turning Diameter	300 mm
Max Turning Length	1,000 mm
Max Spindle Speed	20,000 rpm
Bar Capacity	65 mm
Chuck Size	200 mm

Specifications sourced from chiron-group.com — verified 2026-03-28

Strengths & Limitations

Strengths

Up to 176-tool magazine provides deep capacity for complex parts requiring extensive milling and turning tooling in one setup
Separate turning and milling spindles avoid the compromises of single-spindle mill-turn machines that must serve both functions
300 mm diameter x 1,000 mm length workpiece capacity handles longer shaft-type and cylindrical parts than most compact mill-turn machines
Complete machining from bar stock or chuck work eliminates re-clamping errors and reduces production lead time
STAMA heritage brings decades of proven complete machining expertise to the Chiron Group platform
5-axis simultaneous capability handles complex geometries that would require multiple setups on separate machines

Limitations

STAMA brand integration into Chiron Group may create confusion in the market regarding parts availability and service continuity
Cast-iron bed is heavier and less vibration-damping than Chiron's mineral-cast bed used on pure milling platforms
Starting price around $550,000 competes directly with established mill-turn platforms from DMG Mori and Mazak with larger installed bases
Ball-screw drives do not provide the linear direct drive dynamics available on Chiron's dedicated milling machines
Programming complexity of combined bar-stock and mill-turn operations requires specialized CAM software and experienced programmers

Best For

Aerospace manufacturers producing shafts, spindles, and cylindrical components requiring complete milling and turning in one setup Medical device companies machining bone screws, spinal implants, and surgical instruments from bar stock with complex 5-axis features Automotive manufacturers producing drive shafts, gear blanks, and turbocharger shafts requiring combined operations General precision engineering shops machining complex shaft-type parts up to 1,000 mm length Hydraulic component manufacturers producing valve spools, pistons, and cylinders requiring both turning and cross-hole milling Shops seeking to consolidate turning and milling operations into a single machine for reduced lead time and improved accuracy

Frequently Asked Questions

01 What does a new Chiron 715 MT cost?

New 715 MT machines start around $550,000 and can reach $800,000 with expanded tool magazine, bar feeder, high-pressure coolant, probing, and automation. Used units from 2016-2022 trade between $275,000 and $525,000 depending on configuration and hours.

02 Is the 715 MT a STAMA or Chiron machine?

The 715 MT was originally developed by STAMA, a German machine tool builder. Chiron Group acquired STAMA and integrated its product line. The machine is now sold under the Chiron Group brand but retains the STAMA design heritage. Service, parts, and support are provided through Chiron Group's network.

03 How does the 715 MT compare to the Mazak Integrex i-300?

Both are mid-size 5-axis mill-turn machines. The Mazak Integrex has a lathe-first architecture with added milling, while the 715 MT has separate turning and milling spindles. The Mazak has a larger installed base and service network. The 715 MT offers higher tool capacity (176 vs typically 72 tools) and the separate spindle architecture. Choose based on whether your parts are turning-dominant (Mazak) or require extensive milling tooling (715 MT).

04 Can the 715 MT work from bar stock?

Yes. The 715 MT is designed for both bar stock feeding and individual chuck work. Bar stock capability enables automated production of multiple parts from a single bar, which is ideal for medium-volume production of shaft-type components. A bar feeder is available as an option for automated bar loading.

05 What is 'complete machining'?

Complete machining means all operations — turning, milling, drilling, tapping, threading, boring, and finishing — are performed in a single machine setup. Raw material goes in and finished parts come out without transferring between machines. This eliminates re-clamping errors, reduces handling, and compresses production lead time from days to hours for complex parts.