External Grinding Spindle
170MD30Y20 HC63
High-performance asynchronous motor spindle for external/cylindrical grinding. 20 kW power at 30,000 r/min with 300mm maximum wheel diameter. Water-cooled with micron-level accuracy.
170MD30Y20 HC63 External Grinding Spindle
The 170MD30Y20 HC63 is a dedicated external grinding spindle designed for CNC cylindrical grinding machines performing high-precision external diameter grinding operations. Powered by a 20 kW asynchronous induction motor, this spindle achieves operational speeds up to 30,000 r/min, enabling high wheel surface speeds for efficient material removal and superior surface finish quality.
The spindle accommodates grinding wheels up to 300mm in diameter, supporting a wide range of workpiece sizes and grinding parameters. P4 precision angular contact ball bearings in a rigid preload configuration ensure consistent runout accuracy of 1 micron or less at the wheel mount, critical for achieving tight dimensional tolerances and low surface roughness values. A high-efficiency water-cooling jacket maintains stable thermal conditions, minimizing spindle growth and ensuring consistent workpiece geometry throughout production runs. The 170mm housing diameter and HC63 wheel mounting interface make this spindle directly compatible with major CNC cylindrical grinder brands. It is ideally suited for precision shaft grinding, bearing journal grinding, and high-volume automotive component production.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 30000 (max) |
| Power (kW) | 20 |
| Torque (Nm) | 6.4 |
| Voltage (V) | 380 |
| Current (A) | 42 |
| Motor Type | Asynchronous Induction Motor |
| Wheel Interface | HC63 (cylindrical grinder standard) |
| Max Wheel Diameter | 300mm |
| Max Wheel Width | 63mm |
| Bearing Type | P4 Precision Angular Contact Ball Bearings |
| Bearing Arrangement | Tandem-O-Tandem (TBT) |
| Bearing Lubrication | Oil-air micro-lubrication |
| Runout Accuracy | ≤ 0.001mm at wheel flange |
| Cooling Method | Water-jacket cooling (min 6 L/min) |
| Housing Diameter | 170mm |
| Housing Length | ~550mm |
| Spindle Weight | ~155 kg |
| Sensor Integration | 2x PT100 temperature sensors |
| Protection Class | IP54 |
| Balancing Grade | G0.4 per ISO 1940-1 |
Available Options & Customizations
- Grease lubrication option for reduced maintenance
- Ceramic hybrid bearings for higher speed capability
- Automatic wheel balancing system integration
- Custom wheel flange (HC50, HC80, custom taper)
- Acoustic emission sensor port for gap elimination
- In-process gauging interface
Precision Grinding, Reliable Accuracy
The 170MD30Y20 HC63 combines high-speed grinding capability with micron-level accuracy for demanding cylindrical grinding applications.
30,000 rpm Grinding Speed
High wheel surface speeds for efficient stock removal and superior surface finish.
20 kW Motor Power
Sufficient power for aggressive grinding parameters in hardened steels.
300mm Wheel Capacity
Accommodates large-diameter grinding wheels for versatile workpiece coverage.
P4 Precision Bearings
High-grade angular contact bearings deliver consistent micron-level accuracy.
Oil-Air Lubrication
Precision micro-lubrication ensures optimal bearing condition at high speeds.
Water Cooling
Efficient thermal management maintains geometric stability during production grinding.
HC63 Standard Interface
Direct compatibility with industry-standard cylindrical grinder wheel mounts.
Temperature Monitoring
Dual PT100 sensors for real-time thermal condition monitoring.
Request a Quote for 170MD30Y20 HC63
Tell us your machine specifications and production requirements. Our engineering team will provide a detailed proposal with pricing, lead time, and installation support. Ideal for CNC cylindrical grinding machines, precision shaft and journal grinding, automotive component production, and bearing ring grinding. 24-hour response guaranteed.