DMG Mori CTX beta 1250 TC 4A
Key Specifications
Weight
Rapid Traverse
Max Turn Length
max turning diameter
max x axis travel
max y axis travel
Overview
The DMG Mori CTX beta 1250 TC 4A is the four-axis variant of the workhorse CTX beta 1250 TC platform, adding a fully programmable lower turret axis alongside the main B-axis turn-mill spindle. This enables simultaneous machining operations that slash cycle times on production work by 20-40 percent compared to single-channel processing.
The main spindle is an ISM 102 integrated motor spindle delivering 33 kW (44 hp) at 4,000 RPM with 770 Nm of torque through a 12-inch chuck. Bar capacity is 102 mm (4 in), covering a wide range of production bar stock. The optional sub-spindle provides 29 kW (39 hp) at 5,000 RPM for backworking operations.
The compactMASTER turn-mill spindle runs at 12,000 RPM with 18.5 kW (25 hp) and 120 Nm of torque through an HSK-A63 interface. A 20,000 RPM high-speed option is available. The B-axis swivels through 240 degrees (plus/minus 120 degrees) via Direct Drive Motor with 0.001-degree indexing resolution.
Axis travels span 600 mm (23.6 in) in X, 200 mm (7.9 in) in Y (plus/minus 100 mm), and 1,200 mm (47.2 in) in Z. Maximum turning diameter is 600 mm (23.6 in) with a turning length of 1,250 mm (49.2 in). The lower turret carries 12 VDI 40 stations with driven tools and its own Y-axis stroke. Standard disc magazine holds 24 tools, expandable to 48. Rapid traverse hits 40 m/min. The machine weighs roughly 15,500 kg (34,171 lb). At $500,000-$700,000 configured, it competes with the Mazak Integrex i-300S, Okuma Multus B300II, and the NTX 2000 with lower turret.
Specs sourced from DMG Mori published data and dealer documentation.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 600 mm (23.6 in) |
| Max Turning Length | 1,250 mm (49.2 in) |
| Max X Axis Travel | 600 mm (23.6 in) |
| Max Y Axis Travel | 200 mm (7.9 in) / +/-100 mm |
| Max Z Axis Travel | 1,200 mm (47.2 in) |
| Bar Capacity | 102 mm (4.0 in) |
| Chuck Size | 12 in (305 mm) |
| Main Spindle Speed | 4,000 RPM |
| Main Spindle Power | 33 kW (44 hp) |
| Main Spindle Torque | 770 Nm |
| Sub Spindle Speed | 5,000 RPM (optional) |
| Sub Spindle Power | 29 kW (39 hp) (optional) |
| Turn Mill Spindle Speed | 12,000 RPM (20,000 RPM optional) |
| Turn Mill Spindle Power | 18.5 kW (25 hp) |
| Turn Mill Spindle Torque | 120 Nm |
| Turn Mill Spindle Interface | HSK-A63 |
| B Axis Swivel | +/-120 deg (240 deg total), Direct Drive Motor |
| Tool Magazine | 24 standard / 48 optional |
| Lower Turret | 12-position VDI 40 with driven tools and Y-axis |
| Rapid Traverse Rate | 40 m/min (1,575 ipm) |
| CNC Control | CELOS with Siemens SINUMERIK 840D sl |
| Machine Weight | 15,500 kg (34,171 lb) |
| Floor Space | 4,200 x 2,650 mm |
| 340 Mm | 13.4 in. |
| 1185 Mm | 46.7 in. |
| 102 Mm | 4 in. |
| 490 Mm | 19.3 in. |
| 200 Mm | 7.9 in. |
| 1200 Mm | 47.2 in. |
| Details | Strongest version for 210 kg payloadFree accessibility to the machine and the automationStrongest version for 210 kg payloadFree accessibility to the machine and the automation |
| Strongest Version For 210 Kg Payloadfree Accessibility To The Machine And The Automation | Strongest version for 210 kg payloadFree accessibility to the machine and the automation |
| Strongest Version For 210 Kg Payload | Free accessibility to the machine and the automation |
| Procedure | User Interface |
| Customer Benefits | MPC Graph: aktuelle und angelernte Prozesswerte. / MPC Diagnostics: Lagerzustand, Anzahl von Stoß und Crash. |
Specifications sourced from us.dmgmori.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Four-axis configuration with B-axis milling head and programmable lower turret enables simultaneous machining that cuts cycle times by 20-40 percent on production work
- 102 mm (4 in) bar capacity is among the largest in the mid-size turn-mill category, handling substantial bar stock for production runs
- 33 kW main spindle with 770 Nm torque delivers the grunt for heavy interrupted turning in superalloys, tool steels, and hardened materials
- 1,250 mm turning length handles shaft-type components that most compact turn-mill centers cannot accommodate
- compactMASTER B-axis at 12,000 RPM (20,000 RPM optional) with HSK-A63 provides machining center-class milling performance
- Direct Drive B-axis with 0.001-degree indexing resolution ensures precise angular positioning for complex contour work
- CELOS with Siemens 840D sl gives access to DMG Mori full suite of technology cycles including gearSKIVING and gearMILL
Limitations
- Starting at $500K, the 4A variant costs $100K-$150K more than the standard CTX beta 1250 TC
- Programming simultaneous B-axis and lower turret operations demands advanced CAM support and experienced operators
- At 15,500 kg, the machine needs serious foundation work and rigging logistics adding $15,000-$30,000 to installed cost
- 4,000 RPM main spindle speed limits high-speed small-diameter turning compared to 5,000-6,000 RPM machines
- DMG Mori service contracts and spare parts costs run 15-25 percent higher than comparable Japanese machines
Best For
Frequently Asked Questions
01
A new CTX beta 1250 TC 4A starts around $500,000. Adding the sub-spindle, 20,000 RPM milling spindle, expanded 48-tool magazine, and automation pushes the price to $600,000-$700,000.
02
The 4A adds a fully programmable fourth axis to the lower turret with its own Y-axis, enabling true simultaneous machining where the B-axis and lower turret work the part at the same time. This parallel processing cuts cycle times significantly on production work.
03
The CTX beta 1250 TC 4A has a more powerful main spindle (33 kW vs 22 kW), larger bar capacity (102 mm vs 65 mm), and runs Siemens exclusively. The NTX 2000 has longer Z-axis travel (1,562 vs 1,200 mm) and uses Fanuc (Siemens optional on 3rd Gen).
04
Esprit, hyperMILL, and Mastercam with the mill-turn module. Budget $15,000-$25,000 for CAM and post-processor development for the full 4A configuration.
05
Yes. DMG Mori offers Robo2Go 2nd Generation for flexible loading, bar feeders up to 102 mm, and gantry loaders for higher-volume production.
Videos
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Community Discussions
Options and configuration advice — DMG MORI, Gildemeister, Maho CNC | DMG CTX BETA 1250 TC ...
Pricing and buying discussion — Multus U3000 vs. CTX Beta 1250 TC - Practical Machinist
Pricing and buying discussion for this machine model.
Troubleshooting and problem-solving — DMG MORI, Gildemeister, Maho CNC | Gildemeister CTX 1250 beta ...
Community discussion — Anyone here run Mori NT, NTX or CTX? : r/Machinists - Reddit
Troubleshooting and problem-solving — Opinions on ROMI lathes : r/Machinists - Reddit
Maintenance and service — DMG MORI tool change alarm help : r/Machinists - Reddit
Community discussion — Programming off center of rotation : r/Machinists - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
Comparisons
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