High Frequency Spindle Multipliers For Machine Centre & Milling Machine

PMK High-Frequency Spindle Multipliers are compact, precision-engineered speed-increasing heads designed to extend the spindle speed range of machining centres and milling machines.
They enable high-speed finishing, micro-drilling, and fine tool applications by multiplying the main spindle speed up to 24,000–36,000 rpm while maintaining excellent balance, rigidity, and thermal stability. The units mount directly on BT30, BT40, or BT50 tapers, providing an immediate speed upgrade without major machine modifications.
Key benefits
- Performance: delivers up to 36,000 rpm speed output with power options of 0.5–2.0 kW for fine machining operations.
- Precision: equipped with VEX-series high-speed angular-contact bearings (e.g., VEX15 / VEX20) for smooth rotation and low vibration.
- Compatibility: available for BT30, BT40, and BT50 spindles; interchangeable across machining and milling centres.
- Versatility: ER11 and 1:10 taper shaft interfaces support various cutting and grinding tools.
- Convenience: self-contained motorized heads with built-in frequency converters for plug-and-play integration.
Applications
- High-speed milling, engraving, and drilling on machining centres.
- Tool and die finishing, precision contour machining.
- Retrofit upgrades for BT-taper CNC machines.
- Micro-machining, fine surface finishing, and mold cavity polishing.
- High-speed spindle enhancement for vertical or horizontal CNC setups.
Specifications

| Type | D | L | Speed r/min | Power kW | Voltage V | Current A | Frequency Hz | Converter kW | Bearing C/P4 | Connecting shaft end | Application |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BT50SMH24A | 95 | 190 | 24000 | 0.5 | 220 | 2 | 400 | 0.75 | 2-VEX20 1-VEX15 | ER11 | Speed-increasing head for BT50 grinding spindle of machining center |
| BT50SMH24A | 95 | 190 | 24000 | 0.5 | 110 | 3.8 | 400 | 0.75 | 2-B7004 1-B7002 | ER11 | Speed-increasing head for BT50 grinding spindle of machining center |
| BT40SMH24A | 95 | 190 | 24000 | 0.5 | 220 | 2 | 400 | 0.75 | 2-VEX20 1-VEX15 | ER11 | Speed-increasing head for BT40 grinding spindle of machining center |
| BT30SMH24A | 95 | 190 | 24000 | 0.5 | 220 | 2 | 400 | 0.75 | 2-VEX17 1-VEX15 | ER11 | Speed-increasing head for BT30 grinding spindle of machining center |
| BT50SMH36A | 100 | 175 | 36000 | 2 | 350 | 5 | 600 | 2.2 | 2-VEX20 1-VEX15 | 1:10 taper shaft | Speed-increasing head for BT50 grinding spindle of machining center |
| BT40SMH36A | 100 | 175 | 36000 | 2 | 350 | 5 | 600 | 2.2 | 2-VEX17 1-VEX15 | 1:10 taper shaft | Speed-increasing head for BT40 grinding spindle of machining center |
| BT30SMH36A | 100 | 175 | 36000 | 2 | 350 | 5 | 600 | 2.2 | 2-VEX17 1-VEX15 | 1:10 taper shaft | Speed-increasing head for BT30 grinding spindle of machining center |
* Specifications subject to change. Contact us for the latest datasheet and custom configurations.
* Refer Disclaimer policy for more details.
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