Large External Grinding Spindle
250MD06G32
Massive 250mm housing synchronous motor spindle with 600mm grinding wheel capacity. 32 kW power, 51.0 Nm torque for large roll grinding, heavy cylindrical grinding, and steel mill roll machining.
250MD06G32 Large External Grinding Spindle
The 250MD06G32 is our largest external grinding spindle, built on a massive 250mm housing platform for the most demanding large-scale cylindrical and roll grinding applications. With 32 kW of continuous power at 6,000 r/min and an extraordinary 51.0 Nm of torque, this synchronous motor spindle delivers the heavy-cutting capability required for large roll grinding, heavy cylindrical grinding, and steel mill roll machining where oversized workpieces demand maximum rigidity and material removal capacity.
Equipped with P4/P2 hybrid angular contact ball bearings in a tandem-O configuration engineered for maximum grinding rigidity under extreme loads, the 250MD06G32 achieves runout accuracy of 0.001mm or less at the grinding wheel arbor. The spindle offers flexible lubrication options -- a simplified long-life grease system for standard operations or an advanced oil-air micro-lubrication system for the most demanding continuous-duty applications. The high-capacity spiral water-cooling jacket maintains stable thermal conditions during extended heavy grinding cycles. With an industry-leading maximum grinding wheel diameter of 600mm and a massive 250mm housing diameter, this spindle is the definitive solution for the largest external grinding tasks. Dynamically balanced to G0.4 per ISO 1940-1 and rated IP54, the ~340 kg weight provides unmatched rigidity and vibration damping for steel mill and heavy industrial grinding environments.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 6000 |
| Power (kW) | 32 |
| Torque (Nm) | 51.0 |
| Motor Type | Synchronous Motor |
| Bearing Type | P4/P2 Angular Contact Ball Bearings |
| Bearing Arrangement | Tandem-O pair for maximum grinding rigidity |
| Runout Accuracy | ≤ 0.001mm at grinding wheel arbor |
| Cooling Method | Water-jacket cooling with external chiller |
| Lubrication | Grease lubrication (oil-air optional) |
| Housing Diameter | 250mm |
| Housing Material | Alloy Steel (42CrMo4) |
| Spindle Weight | ~340 kg |
| Grinding Wheel Max Diameter | 600mm |
| Spindle Nose | Custom grinding arbor interface |
| Maximum Speed Factor (dmn) | 1.50 × 10⁶ mm·r/min |
| Noise Level | ≤ 75 dB(A) at max speed |
| Balancing Grade | G0.4 per ISO 1940-1 |
| Protection Class | IP54 |
| Sensor Integration | Built-in temperature sensor (PT100) |
| Mounting Orientation | Horizontal |
| Application | Large roll grinding / heavy cylindrical grinding / steel mill roll machining |
Available Options & Customizations
- Oil-air lubrication system upgrade for continuous duty
- Hybrid ceramic bearings (Si₃N₄ balls) for extreme loads
- Custom grinding wheel arbor interfaces
- Built-in multi-axis vibration monitoring
- Rotary encoder for C-axis positioning
- Increased IP65 protection for wet grinding
Maximum-Scale Grinding Capability
The 250MD06G32 delivers the largest grinding wheel capacity, highest torque, and greatest rigidity in the Songju spindle lineup for massive industrial grinding tasks.
600mm Wheel Capacity
Industry-leading 600mm maximum grinding wheel diameter for large roll grinding and massive cylindrical workpiece applications.
250mm Massive Housing
Largest housing in the lineup delivers unmatched structural rigidity for steel mill roll machining and heavy industrial grinding.
51.0 Nm Maximum Torque
Unmatched torque output for the heaviest material removal in steel mill and large industrial roll grinding operations.
P4/P2 Hybrid Bearing System
Combined P4 and P2 precision angular contact bearings handle extreme grinding forces with sub-micron accuracy at 600mm wheel diameters.
Flexible Lubrication Options
Choice of simplified grease lubrication or advanced oil-air system for continuous-duty steel mill grinding applications.
High-Capacity Water Cooling
Enhanced spiral water jacket handles the thermal load from 32 kW continuous operation with 600mm wheels for stable accuracy.
G0.4 Precision Balancing
Dynamically balanced to G0.4 grade at ~340 kg, critical for achieving superior surface finish with the largest grinding wheels.
Built-in Temperature Monitoring
PT100 sensor provides real-time thermal data for proactive management during extended heavy industrial grinding cycles.
Request a Quote for 250MD06G32
Tell us your large-scale grinding requirements and machine specifications. Our engineering team will provide a detailed proposal with pricing, lead time, and integration support. 24-hour response guaranteed.