This 3.5kW spindle and VFD kit is built for medium to heavy-duty CNC routing and milling. The air cooled square spindle provides excellent rigidity and smooth high-speed cutting without the need for water cooling. Paired with the HY 4kW VFD, this kit offers precise spindle speed control and reliable performance for demanding machining applications.

A 13-piece ER20 collet set is included, allowing a wide range of tool sizes to be used.

Includes:

• 1× 3.5kW Air Cooled Square Spindle

• 1× HY 4kW VFD

• 1× ER20 13pc Collet Set

Spindle Specifications:

• Power: 3.5kW

• Voltage: 220V

• Current: 12A

• Collet System: ER20 (13-piece set included)

• Bearings: 7005DB + 6002DT (High Precision)

• Speed: 0–18,000 RPM

• Frequency: 0–300Hz

• Runout: < 0.005mm

• Cooling Method: Air Cooled

• Body Style: Square

VFD Specifications (HY 4kW):

• Model: HY Huanyang

• Power Rating: 4kW

• Input Voltage: 220V (Single Phase)

• Output Voltage: 220V (Three Phase)

• Frequency Range: 0–400Hz

• Use: CNC Spindle Speed Control