External Grinding Spindle
150MD35Y32
Asynchronous motor spindle with 250mm grinding wheel capacity. 32 kW power, 8.7 Nm torque, and sub-micron runout accuracy for high-precision cylindrical and surface grinding operations.
150MD35Y32 External Grinding Spindle
The 150MD35Y32 is a high-performance asynchronous motor spindle engineered for external grinding applications requiring exceptional surface finish and dimensional accuracy. With 32 kW of continuous power and a maximum speed of 35,000 r/min, this spindle delivers the speed and precision needed for cylindrical grinding, surface grinding, and high-precision finishing of hardened steels, ceramics, and advanced materials.
Equipped with P4 precision angular contact ball bearings arranged in a tandem-O configuration optimized for grinding rigidity, the 150MD35Y32 achieves runout accuracy of 0.001mm or less at the grinding wheel arbor. The spiral water-cooling jacket maintains stable thermal conditions during extended grinding cycles, while the oil-air micro-lubrication system ensures reliable bearing performance at high speeds. With a maximum grinding wheel diameter of 250mm, this spindle handles a broad range of external grinding tasks. Dynamically balanced to G0.4 per ISO 1940-1 and operating at ≤70 dB(A), it meets the demands of modern precision grinding workshops. The compact 150mm housing and ~65 kg weight make it ideal for both OEM machine integration and retrofit applications.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 35000 |
| Power (kW) | 32 |
| Torque (Nm) | 8.7 |
| Motor Type | Asynchronous Motor |
| 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 | Oil-air micro-lubrication |
| Housing Diameter | 150mm |
| Housing Material | Alloy Steel (42CrMo4) |
| Spindle Weight | ~65 kg |
| Grinding Wheel Max Diameter | 250mm |
| Spindle Nose | Custom grinding arbor interface |
| Maximum Speed Factor (dmn) | 1.2 × 10⁶ mm·r/min |
| Noise Level | ≤ 70 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 external grinding / surface grinding |
Available Options & Customizations
- Hybrid ceramic bearings (Si₃N₄ balls) for higher speeds
- 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
Precision Grinding Performance
The 150MD35Y32 combines proven asynchronous motor technology with precision engineering to deliver superior grinding results shift after shift.
35,000 rpm High-Speed Capability
Achieves the high surface speeds required for precision grinding of hardened steels and advanced materials.
P4 Precision Angular Contact Bearings
Tandem-O arrangement provides exceptional radial and axial rigidity for demanding grinding operations.
Optimized Water Cooling
Spiral water jacket design maintains stable temperature, minimizing thermal growth for consistent grinding accuracy.
Oil-Air Micro-Lubrication
Precision oil-air delivery system ensures optimal bearing lubrication at all speeds with minimal lubricant consumption.
G0.4 Precision Balancing
Dynamically balanced to G0.4 grade for ultra-low vibration across the entire speed range, ensuring superior surface finish.
250mm Wheel Capacity
Accepts grinding wheels up to 250mm diameter, accommodating a wide range of external grinding operations.
Built-in Temperature Monitoring
PT100 temperature sensor provides real-time thermal data to the machine controller for proactive thermal management.
≤70 dB(A) Low-Noise Operation
Quiet operation improves the working environment and enables installation in noise-sensitive production areas.
Request a Quote for 150MD35Y32
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