Perske KRSV51-14-2D Spindle Motor
Perske KRSV51-14-2D high-precision, 5.5HP dual-voltage (220/380V) high-frequency spindle motor operates at 18,000 RPM and 300Hz. Built with double bearings and an SYOZ 25 (FRL 90) collet system for reliable industrial CNC routing.
Description
The Perske KRSV51-14-2D high-frequency motor delivers robust 5.5 HP (S1 continuous duty) performance at 18,000 RPM and 300 Hz. Designed for heavy-duty industrial CNC routers, wood processing, and high-speed milling equipment, this motor combines a narrow, space-saving frame profile with rigid structural integrity. Operating on dual voltage (220V/380V 3-phase), the unit utilizes direct tool clamping via an SYOZ 25 / FRL 90 collet system, ensuring minimal tool runout and high mechanical rigidity during aggressive cutting operations.
The KRS series engineering architecture incorporates reinforced double bearing arrangements at the shaft front to handle high radial and axial loading. A totally enclosed, fan-cooled (TEFC) housing rated to IP54 standards protects motor internals against airborne dust, wood flour, and foreign particulates. The integrated top-rear terminal box simplifies cabinet wiring integration in tight multi-axis spindle arrays.
Technical Specifications
- Series:Â Perske type KRSV 51, model KRSV51-14-2D
- Tool Change: Manual Tool Change (MTC)
- Tool Interface:Â FRL 90 / SYOZ 25 / OZ 1836 collet DIN 6388
- 1 inch max tool diameter
- FRL 90 / SYOZ 25 cover nut
- Bearing: Double bearing
- T-box: Top Rear
- Thread: Standard RH (right-hand) thread
- Protection Class:Â IP54
- Cooling: Self-cooled by integrated fan
- Speed:Â 18,000 RPM speed
- Frequency: 300 Hz
- Pole Count: 2-pole
- Power:
- S1: 5.5 hp (4.1 kW)
- S6: 7 hp (5.1 kW)
- Voltage: 220 V / 380 V (Dual Voltage), 3 phase
Additional information
| Manufacturer | Perske |
|---|---|
| Country/Region of Manufacture | Germany |
| Model Series | |
| Part Number (MPN) | KRSV 51.14-2D, KRSV51-14-2D |
| Tool Change | |
| Tool Holder | SYOZ 25 |
| Cooling Method | Shaft Fan-Cooled |
| Speed (RPM) | 18,000 |
| Output Frequency (Hz) | 300 |
| Poles | 2 |
| Horsepower (hp) | 5.5 |
| Kilowatt (kW) | 4.1 |
| Voltage (V) | 220, 380 |
| Condition | New |
Common Failure Modes & Troubleshooting
Understanding operational stress factors ensures maximum service life and minimizes unexpected machine spindle failure during critical production cycles.
Bearing Race Pitting (Electrical Discharge/Fluting)
Running this spindle on a static frequency inverter without output sine filters or proper motor-to-drive grounding leads to micro-arcing across the double bearing races, causing high-frequency chatter marks and rapid bearing failure.
Thermal Overload from Low Speed Operation
The self-cooled TEFC fan’s airflow velocity drops off significantly below nominal speeds. Continuous high-torque operation below 12,000 RPM without auxiliary cooling causes stator winding insulation degradation.
Collet Bore Contamination & Tool Runout
Failing to clean the internal SYOZ 25 taper and covernut threads before tool changes traps fine debris, inducing Total Indicated Runout (TIR) greater than 0.005 mm, resulting in premature bearing wear and broken tooling.
Need help diagnosing an operational issue, setting up VFD parameters, or replacing a worn unit? Contact our senior CNC technical support team today for factory-certified guidance and immediate repair services.
