
This compact 4 kW air-cooled spindle delivers industrial power in a space-saving package, measuring just 7.5 cm in diameter and 33.9 cm long, and running on standard 220 V supply. With a top speed of 18,000 rpm, 300 Hz capability, and runout under 0.002 mm, it produces exceptionally precise cuts and smooth surface finishes for engraving, milling, and detailed CNC work. The ER25 collet is made from quenched manganese steel for superior clamping accuracy and reduced tool breakage, giving you more reliable results and longer tooling life. Four imported high-precision bearings and dynamic balancing reduce vibration and noise while improving durability and corrosion resistance for extended continuous operation. Air-cooling provides efficient heat dissipation so the spindle stays stable under heavy loads without needing complex coolant systems. Rated at 13.5 A, this spindle is designed to pair seamlessly with a frequency converter for easy speed control and integration into existing CNC setups. Whether you run a small shop or a hobbyist workshop, the combination of compact size, high power, and professional-level precision makes this spindle a cost-effective upgrade. Faster cycle times, less maintenance, and consistent machining quality are the tangible benefits that translate directly to better productivity and reduced operating costs.
Compact 4 kW air-cooled spindle: φ3 x 13 in (7.5 cm diameter × 33.9 cm length), 220 V, 13.5 A, ER25 collet, 4 high-precision bearings, 300 Hz, 18,000 rpm, runout < 0.002 mm. The ER25 collet is quenched manganese steel for high precision and reduced tool breakage; dynamic balancing minimizes noise. Imported high-accuracy bearings improve durability and corrosion resistance, while the air-cooling design ensures effective heat dissipation. Ideal for engraving machines or use with a frequency converter.
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