External Grinding Spindle
170MD05G14B
B-type synchronous motor spindle with 500mm grinding wheel capacity. 14 kW power, 26.7 Nm torque, and sub-micron runout accuracy for large cylindrical grinding, roll grinding, and heavy workpiece external grinding.
170MD05G14B External Grinding Spindle
The 170MD05G14B is a B-type synchronous motor spindle engineered for large-scale external grinding applications. With 14 kW of continuous power at 5,000 r/min and 26.7 Nm of torque, this robust spindle delivers the heavy-cutting capability required for large cylindrical grinding, roll grinding, and heavy workpiece external grinding operations where oversized components demand exceptional rigidity and material removal capacity.
Equipped with P4 precision angular contact ball bearings in a tandem-O configuration optimized for maximum grinding rigidity, the 170MD05G14B achieves runout accuracy of 0.001mm or less at the grinding wheel arbor. The B-type designation indicates an enhanced bearing arrangement and reinforced housing structure for superior load capacity. 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 500mm and a robust 170mm housing diameter, this spindle is purpose-built for the largest external grinding tasks. Dynamically balanced to G0.4 per ISO 1940-1 and rated IP54, it is engineered for demanding production environments. The ~135 kg weight provides exceptional rigidity and vibration damping for roll grinding and heavy workpiece applications.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 5000 |
| Power (kW) | 14 |
| Torque (Nm) | 26.7 |
| Motor Type | Synchronous Motor |
| Spindle Type | B-type (reinforced housing) |
| 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 | 170mm |
| Housing Material | Alloy Steel (42CrMo4) |
| Spindle Weight | ~135 kg |
| Grinding Wheel Max Diameter | 500mm |
| Spindle Nose | Custom grinding arbor interface |
| Maximum Speed Factor (dmn) | 0.85 × 10⁶ mm·r/min |
| 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 | Large cylindrical grinding / roll grinding / heavy workpiece external 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
Large-Scale Grinding Performance
The 170MD05G14B delivers the rigidity, torque, and precision required for the most demanding large-scale external grinding applications.
B-Type Reinforced Housing
Enhanced bearing arrangement and reinforced 170mm housing deliver superior rigidity for heavy roll grinding and large workpiece applications.
26.7 Nm High Torque Output
Delivers exceptional torque for heavy material removal rates in large cylindrical and roll grinding operations.
P4 Precision Angular Contact Bearings
Tandem-O arrangement provides exceptional radial and axial rigidity for heavy-duty grinding with large wheels.
Optimized Water Cooling
Spiral water jacket design maintains stable temperature, minimizing thermal growth for consistent grinding accuracy during long cycles.
Simplified Grease Lubrication
Long-life grease lubrication reduces maintenance complexity and operating costs in production environments.
G0.4 Precision Balancing
Dynamically balanced to G0.4 grade for ultra-low vibration, critical for achieving superior surface finish on large components.
500mm Wheel Capacity
Accepts grinding wheels up to 500mm diameter, the largest in its class for roll grinding and massive cylindrical workpieces.
Built-in Temperature Monitoring
PT100 temperature sensor provides real-time thermal data to the machine controller for proactive thermal management.
Request a Quote for 170MD05G14B
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.