External Grinding Spindle
155MD06G19
Synchronous motor (G-type) spindle with 400mm grinding wheel capacity. 19 kW power, 30.3 Nm torque, and sub-micron runout accuracy for heavy-duty cylindrical and external grinding of shafts and rollers.
155MD06G19 External Grinding Spindle
The 155MD06G19 is a high-torque synchronous motor spindle engineered for heavy-duty external grinding applications. With 19 kW of continuous power and a maximum speed of 6,000 r/min, this G-type permanent magnet synchronous motor spindle delivers exceptional torque density — 30.3 Nm — making it ideal for cylindrical grinding, shaft grinding, and roller grinding operations where high material removal rates and consistent surface finish are required.
Equipped with P4 precision angular contact ball bearings in a tandem-O configuration optimized for grinding rigidity, the 155MD06G19 achieves runout accuracy of 0.001mm or less at the grinding wheel arbor. The spiral water-cooling jacket maintains stable thermal conditions during extended heavy-duty grinding cycles, while the simplified grease lubrication system ensures reliable bearing performance with minimal maintenance. With a maximum grinding wheel diameter of 400mm and a robust 155mm housing diameter, this spindle handles large-diameter external grinding tasks. Dynamically balanced to G0.4 per ISO 1940-1 and rated IP54, it is built for demanding production environments. The ~120 kg weight provides excellent rigidity and vibration damping for heavy grinding operations.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 6000 |
| Power (kW) | 19 |
| Torque (Nm) | 30.3 |
| Motor Type | Synchronous Motor (G-type) |
| Bearing Type | P4 Angular Contact Ball Bearings |
| Bearing Arrangement | Tandem-O pair for grinding rigidity |
| Runout Accuracy | ≤ 0.001mm at grinding wheel arbor |
| Cooling Method | Water-jacket cooling with external chiller |
| Lubrication | Grease lubrication |
| Housing Diameter | 155mm |
| Housing Material | Alloy Steel (42CrMo4) |
| Spindle Weight | ~120 kg |
| Grinding Wheel Max Diameter | 400mm |
| Spindle Nose | Custom grinding arbor interface |
| Motor Efficiency Class | IE4 Premium Efficiency |
| Noise Level | ≤ 72 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 | Cylindrical grinding / external grinding of shafts and rollers / heavy-duty grinding |
Available Options & Customizations
- Hybrid ceramic bearings (Si₃N₄ balls) for extended life
- Oil-air lubrication system upgrade
- Custom grinding wheel arbor interfaces
- Built-in vibration monitoring sensor
- Rotary encoder for C-axis positioning
- Increased IP65 protection for wet grinding
Heavy-Duty Grinding Performance
The 155MD06G19 combines synchronous motor efficiency with precision engineering to deliver superior grinding results in demanding production environments.
6,000 rpm High-Torque Capability
Delivers 30.3 Nm of continuous torque for demanding cylindrical and shaft grinding operations with high material removal rates.
Synchronous Motor (G-type)
Permanent magnet synchronous motor delivers superior efficiency and constant torque across the entire operating speed range.
P4 Precision Angular Contact Bearings
Tandem-O arrangement provides exceptional radial and axial rigidity for heavy-duty grinding operations.
Simplified Grease Lubrication
Long-life grease lubrication eliminates the need for external oil supply systems, reducing maintenance and operating costs.
Optimized Water Cooling
Spiral water jacket design maintains stable temperature, minimizing thermal growth for consistent grinding accuracy during long cycles.
G0.4 Precision Balancing
Dynamically balanced to G0.4 grade for ultra-low vibration across the entire speed range, ensuring superior surface finish.
400mm Wheel Capacity
Accepts grinding wheels up to 400mm diameter, accommodating a wide range of large-diameter external grinding operations.
Built-in Temperature Monitoring
PT100 temperature sensor provides real-time thermal data to the machine controller for proactive thermal management.
Request a Quote for 155MD06G19
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