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

The 3.5 kW Air-Cooled Square Spindle Motor is a high-performance industrial solution designed for demanding CNC applications where stability and power flexibility are paramount. This motor is uniquely engineered with a dual voltage architecture, allowing for operation on either 220V or 380V systems, making it highly versatile for different workshop environments. Its square body design offers superior mounting rigidity, significantly reducing vibration during heavy-duty wood carving and milling operations. Operating at a peak speed of 18,000 RPM with a 300 Hz frequency, it delivers a consistent 1.68 N.m torque. Equipped with a premium P4 bearing configuration (2x 7007 & 2x 7002) and an ER25 collet interface supporting tools up to 16mm, this 8.5 kg spindle provides the precision and durability required for professional machining centers.

Versatile Dual Voltage support (220V/380V)
High-Stability Square Body design for rigid mounting
Precision P4 Grade Bearing Assembly (7007 & 7002)
Stable 300 Hz High-Frequency operation
Efficient Air Cooling for continuous industrial duty
ER25 Collet system for tool shanks up to 16mm

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

Industrial Applications

Usage Scenario	Target Industry
High-Performance CNC Wood Carving	Industrial Woodworking and Furniture
Industrial Furniture and Panel Processing	Signage and Advertising Industries
Medium-Duty Metal Engraving and Milling	Machine Tool Manufacturing
Acrylic and Composite Material Routing	Commercial Fabrication and Milling
Automated Signage Production	General Precision Engineering
VMC Machine Tooling Retrofitting	General Engineering

Technical FAQ & Operational Guide

What is the advantage of a 'Dual Voltage' spindle?

A dual voltage spindle can be configured to run on either a standard 220V single-phase input (via VFD) or a 380V three-phase input. This allows the motor to be used in various industrial environments without needing to change the motor itself.

Why choose the square body for wood carving?

The square body provides a much larger and more stable mounting surface compared to round spindles. This reduces mechanical vibration, which is critical for achieving a high-quality finish on complex wood carving designs.

What type of VFD is required for this 3.5kW motor?

You need a High-Frequency VFD rated for at least 3.5kW (5HP) that supports a 300 Hz output. Ensure the VFD is matched to your available input voltage (220V or 380V).

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 Air-Cooled Square ER25

Versatile Dual Voltage support (220V/380V)

High-Stability Square Body design for rigid mounting

Precision P4 Grade Bearing Assembly (7007 & 7002)

Stable 300 Hz High-Frequency operation

Efficient Air Cooling for continuous industrial duty

ER25 Collet system for tool shanks up to 16mm

⚡ 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

MAX SPEED

18000 RPM

MECHANICAL

weight: 8.5 Kg | coolingType: Air Cooled | bodyType: Square Profile

FREQUENCY

300 Hz

POLE COUNT

2 Pole

BEARING CONFIGURATION

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

MODEL NUMBER

A35180S2238M125

POWER RATING

3.5 kW

OPERATING VOLTAGE

220 V / 380 V (Dual)

RATED CURRENT

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

RATED TORQUE

1.68 N.m

COLLET INTERFACE

ER25 (1mm - 16mm)

Usage Scenario

Target Industry

High-Performance CNC Wood Carving

Industrial Woodworking and Furniture

Industrial Furniture and Panel Processing

Signage and Advertising Industries

Medium-Duty Metal Engraving and Milling

Machine Tool Manufacturing

Acrylic and Composite Material Routing

Commercial Fabrication and Milling

Automated Signage Production

General Precision Engineering

VMC Machine Tooling Retrofitting

General Engineering