CNC Milling Spindle
230XDJ12G40
High-torque asynchronous motor spindle with BT50 interface. 40 kW power, 318 Nm torque, ideal for heavy-duty milling in steel and demanding materials.
230XDJ12G40 CNC Milling Spindle
The 230XDJ12G40 is a high-torque asynchronous motor spindle built for heavy-duty CNC milling operations where maximum metal removal rates are required. Delivering 40 kW of power and an impressive 318 Nm of torque at 12,000 r/min, this spindle excels in roughing and semi-finishing operations in steel, cast iron, and difficult-to-machine alloys.
The asynchronous induction motor design provides robust, field-proven reliability with lower rotor inertia for responsive acceleration and deceleration. A precision-ground BT50 tool interface accommodates large-diameter face mills, shell mills, and heavy boring bars with secure, repeatable clamping. P4 precision angular contact ball bearings arranged for maximum radial and axial rigidity ensure runout accuracy within 1 micron. The high-capacity water-cooling system maintains thermal stability during continuous production runs. Housed in a 230mm diameter cartridge and weighing approximately 290 kg, this spindle is ready for integration into horizontal and vertical machining centers, bridge mills, and specialized heavy-cutting machine tools.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 12000 |
| Power (kW) | 40 |
| Torque (Nm) | 318 |
| Voltage (V) | 380 |
| Current (A) | 85 |
| Motor Type | Asynchronous Induction Motor (Squirrel Cage) |
| Tool Interface | BT50 (MAS 403) |
| Bearing Type | P4 Precision Angular Contact Ball Bearings |
| Bearing Arrangement | Tandem-O-Tandem (TBT) |
| Bearing Lubrication | Grease (standard) / Oil-air (optional) |
| Runout Accuracy | ≤ 0.001mm at spindle nose |
| Cooling Method | Water-jacket cooling (min 8 L/min flow) |
| Housing Diameter | 230mm |
| Housing Length | ~750mm |
| Spindle Weight | ~290 kg |
| Tool Clamping | Hydraulic drawbar with Belleville spring stack |
| Drawbar Force | 28 kN |
| Sensor Integration | 2x PT100 temperature sensors |
| Protection Class | IP54 |
| Balancing Grade | G0.4 per ISO 1940-1 |
Available Options & Customizations
- Oil-air lubrication for extended high-speed duty cycles
- Ceramic hybrid bearings for improved thermal stability
- Drawbar clamping verification sensor
- Custom tool interface (HSK A63, HSK A100, BT40)
- Spindle orientation encoder for automated tool change
- Through-spindle coolant capability (up to 70 bar)
Maximum Torque for Heavy Cutting
The 230XDJ12G40 delivers class-leading torque with proven asynchronous motor reliability for demanding production environments.
High-Torque Asynchronous Motor
Proven induction motor technology delivers exceptional torque for heavy material removal.
318 Nm Peak Torque
Class-leading torque output enables aggressive cutting parameters in steel and cast iron.
BT50 Tool Interface
Robust BT50 taper provides maximum rigidity for large face mills and boring tools.
P4 Precision Bearings
High-grade angular contact bearings ensure sustained accuracy under heavy cutting loads.
Comprehensive Water Cooling
High-capacity water jacket prevents thermal drift during extended production runs.
Dynamic Rotor Balancing
G0.4 balance grade minimizes vibration and extends bearing life.
Heavy-Duty Drawbar
28 kN clamping force ensures secure tool retention during interrupted cuts.
Flexible Integration
Standard 230mm cartridge fits most machining center designs with minimal adaptation.
Request a Quote for 230XDJ12G40
Tell us your machine specifications and production requirements. Our engineering team will provide a detailed proposal with pricing, lead time, and installation support. 24-hour response guaranteed.
Applications: Heavy-duty horizontal machining centers · Bridge mills and gantry machines · Steel and cast iron roughing · Large-component manufacturing · Energy sector component machining (wind, oil & gas) · Construction equipment parts