CNC Spindle Motor 3.5 kW, 18000 RPM, 220V/380V Dual Air-Cooled ER25

The 3.5 kW Air-Cooled Square Spindle Motor is a robust industrial solution designed for precision machining in wood routing, PCB manufacturing, and general CNC applications. Delivering a powerful 3.5 kW output at a peak speed of 18,000 RPM, this motor features a dual-voltage 220V/380V architecture for versatile integration. Built with a stable square body profile, it utilizes a high-precision 4-bearing set (2 x 7007 P4 and 2 x 7002 P4) to ensure minimal runout and exceptional rotational accuracy. The integrated dual air-cooling system provides efficient heat dissipation during continuous industrial duty cycles, eliminating the need for water cooling while maintaining a compact 350mm length. Equipped with a versatile ER25 collet system supporting tool shanks up to 16mm, this 8.5 kg motor offers the mechanical rigidity and 1.68 N.m torque delivery required for superior surface finishes in professional machining environments.

Powerful 3.5 kW Industrial Grade Performance
High-Speed 18,000 RPM for clean micro-machining and routing
Dual Voltage Versatility (220V / 380V Support)
Precision P4 Grade Bearing Assembly (7007 & 7002)
Integrated Dual Air-Cooling for maintenance-free operation
Robust ER25 Collet interface for tool shanks up to 16mm
Compact 350mm Length for easy machine integration

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

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Comparative Technical Spindle Motor Configurations Matrix

Use the structural data catalog matrix below to evaluate power outputs, maximum RPM, operating voltages, and cooling styles across standard TriQuench CNC spindle models.

Spindle Capacity	Operating Speed	Operating Voltage	Cooling System
12.0 kW	18,000 RPM	380 V	Water-Cooled
0.8 kW	24,000 RPM	220 V	Air-Cooled (Long Shaft)
3.7 kW	40,000 RPM	380 V	Water-Cooled ISO20
9.0 kW	18,000 RPM	380 V	Air-Cooled

Technical Specifications

Technical Parameter	Engineering Specification Value
MODEL NUMBER	A35180S2238M125
POWER RATING	3.5 kW
MAX SPEED	18000 RPM
OPERATING VOLTAGE	220 V / 380 V (Dual)
RATED CURRENT	12 A (220V) / 7.2 A (380V)
FREQUENCY	300 Hz
RATED TORQUE	1.68 N.m
POLE COUNT	2 Pole
COLLET INTERFACE	ER25 (1mm - 16mm)
BEARING CONFIGURATION	2 x 7007 P4 (Front), 2 x 7002 P4 (Rear)
MECHANICAL	weight: 8.5 Kg \| length: 350 mm \| coolingType: Dual Air Cooled \| bodyType: Square Profile

Industrial Applications

Usage Scenario	Target Industry
Industrial CNC Wood Routing and Furniture Carving	Commercial Woodworking and Cabinetry
Precision PCB Manufacturing and Drilling	Electronics and Semiconductor Fabrication
Composite and Non-Ferrous Metal Machining	Advertising and Large-Format Signage
Signage, Acrylic, and Plastic Fabrication	Industrial Machine Tool OEM
MDF and Chipboard Processing	Pattern and Die Fabrication Centers
High-Speed Precision Pattern Making	General Engineering

Technical FAQ & Operational Guide

What is the benefit of the square body design for this spindle?

The square body profile provides a flat, stable mounting surface and a larger heat dissipation area. This ensures a more rigid connection to the machine headstock, reducing vibration and chatter marks during aggressive cutting cycles in wood or aluminum.

Can I run this spindle on both 220V and 380V power?

Yes, this motor is designed with dual-voltage support. Depending on your Variable Frequency Drive (VFD) configuration, it can be wired for either 220V or 380V input, making it adaptable to different workshop electrical standards.

Does this model support ceramic bearings?

Yes, while the standard configuration uses high-precision steel P4 bearings, this model is available with an optional ceramic bearing setup for even higher thermal stability and extended operational life at peak speeds.

How is the rotational balancing calibrated on this spindle motor?

Every spindle motor is dynamically balanced in accordance with the ISO 1940 balancing standard to guarantee vibration-free running and maximum stability at high RPMs.

What are the runout tolerances of the shaft and collet interface?

The internal shaft taper maintains a runout accuracy tolerance of under 0.003mm (3 microns), maintaining precise tool concentricity and preventing premature cutter wear.

What cooling precautions are built-in to prevent heat exhaustion?

Built-in temperature dissipation channels support continuous water/liquid cooling circulation or forced fan airflow, preventing thermal expansion of components.

Is this spindle motor compatible with standard VFD inverters and collets?

Yes, the spindle supports direct electrical integration with standard variable frequency drives (VFD) and accepts industrial ER collets (ER11, ER20, ER25, or ER32) to match standard toolholder dimensions.

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CNC Spindle Motor 3.5 kW, 18000 RPM, 220V/380V Dual Air-Cooled ER25

Powerful 3.5 kW Industrial Grade Performance

High-Speed 18,000 RPM for clean micro-machining and routing

Dual Voltage Versatility (220V / 380V Support)

Precision P4 Grade Bearing Assembly (7007 & 7002)

Integrated Dual Air-Cooling for maintenance-free operation

Robust ER25 Collet interface for tool shanks up to 16mm

Compact 350mm Length for easy machine integration

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

Comparative Technical Spindle Motor Configurations Matrix

Use the structural data catalog matrix below to evaluate power outputs, maximum RPM, operating voltages, and cooling styles across standard TriQuench CNC spindle models.

Spindle Capacity	Operating Speed	Operating Voltage	Cooling System
12.0 kW	18,000 RPM	380 V	Water-Cooled
0.8 kW	24,000 RPM	220 V	Air-Cooled (Long Shaft)
3.7 kW	40,000 RPM	380 V	Water-Cooled ISO20
9.0 kW	18,000 RPM	380 V	Air-Cooled

Technical Parameter

Engineering Specification Value

MODEL NUMBER

A35180S2238M125

POWER RATING

3.5 kW

MAX SPEED

18000 RPM

OPERATING VOLTAGE

220 V / 380 V (Dual)

RATED CURRENT

12 A (220V) / 7.2 A (380V)

FREQUENCY

300 Hz

RATED TORQUE

1.68 N.m

POLE COUNT

2 Pole

COLLET INTERFACE

ER25 (1mm - 16mm)

BEARING CONFIGURATION

2 x 7007 P4 (Front), 2 x 7002 P4 (Rear)

MECHANICAL

weight: 8.5 Kg | length: 350 mm | coolingType: Dual Air Cooled | bodyType: Square Profile

Usage Scenario

Target Industry

Industrial CNC Wood Routing and Furniture Carving

Commercial Woodworking and Cabinetry

Precision PCB Manufacturing and Drilling

Electronics and Semiconductor Fabrication

Composite and Non-Ferrous Metal Machining

Advertising and Large-Format Signage

Signage, Acrylic, and Plastic Fabrication

Industrial Machine Tool OEM

MDF and Chipboard Processing

Pattern and Die Fabrication Centers

High-Speed Precision Pattern Making

General Engineering