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

The 3.5 kW Air-Cooled Square Spindle Motor is an industrial-grade powerhouse engineered for demanding CNC woodworking and heavy-duty routing applications. Delivering a max speed of 18,000 RPM at 300 Hz, this motor is specifically optimized for high-torque tasks such as deep wood carving, relief work, and furniture manufacturing. Its square body architecture provides superior mounting rigidity compared to cylindrical models, minimizing vibration during intensive material removal. The motor supports dual-voltage operation (220V/380V), allowing it to integrate seamlessly into diverse industrial power environments. Equipped with an advanced P4 precision bearing configuration (2x 7005 & 2x 7002), the spindle ensures a stable 1.68 Nm torque delivery and long-term rotational accuracy. The integrated air-cooling system provides efficient thermal management without the need for external chillers, making it a reliable and low-maintenance choice for professional CNC workshops.

High-Torque 3.5 kW Industrial Performance
Stable 18000 RPM Output for Woodworking
Dual Voltage Compatibility (220V / 380V)
Rigid Square Body for enhanced mounting stability
Precision P4 Grade Bearing Assembly (7005 & 7002)
ER20 Collet system for tools up to 13mm

⚡ 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: 7.5 kg \| coolingType: Air Cooled (Integrated Fan) \| bodyType: Square Profile
FREQUENCY	300 Hz
POLE COUNT	2 Pole
BEARING CONFIGURATION	2 x 7005 P4 (Front), 2 x 7002 P4 (Rear)
MODEL NUMBER	A35180S2238M120
POWER RATING	3.5 kW
OPERATING VOLTAGE	220 V / 380 V AC
RATED CURRENT	12 A (at 220V) / 7.2 A (at 380V)
RATED TORQUE	1.68 Nm
COLLET INTERFACE	ER20 (1mm - 13mm)

Industrial Applications

Usage Scenario	Target Industry
Heavy-Duty CNC Wood Carving and Relief	Furniture and Joinery Industries
Industrial Furniture and Cabinetry Production	Commercial Signage and Displays
High-Speed MDF and Plywood Machining	Industrial Woodworking and Craftsmanship
3D Pattern Making and Prototyping	Automotive Pattern Making
Signage and Architectural Millwork	Architectural Design and Decoration
Large-Scale Panel Processing	General Engineering

Technical FAQ & Operational Guide

What is the benefit of the square body design?

The square body profile offers a larger surface area for mounting and heat dissipation. It provides much higher mechanical rigidity compared to cylindrical spindles, which is essential for heavy-duty carving and preventing vibration at 18,000 RPM.

Does this spindle require a water chiller?

No, this is an air-cooled model featuring an integrated high-efficiency fan. This simplifies the setup as it removes the need for water pipes, pumps, and cooling reservoirs.

What tools can I use with the ER20 collet on this 3.5kW motor?

The ER20 collet system is standard and supports a wide variety of tools with shank diameters ranging from 1mm up to 13mm.

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

High-Torque 3.5 kW Industrial Performance

Stable 18000 RPM Output for Woodworking

Dual Voltage Compatibility (220V / 380V)

Rigid Square Body for enhanced mounting stability

Precision P4 Grade Bearing Assembly (7005 & 7002)

ER20 Collet system for tools up to 13mm

⚡ 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: 7.5 kg | coolingType: Air Cooled (Integrated Fan) | bodyType: Square Profile

FREQUENCY

300 Hz

POLE COUNT

2 Pole

BEARING CONFIGURATION

2 x 7005 P4 (Front), 2 x 7002 P4 (Rear)

MODEL NUMBER

A35180S2238M120

POWER RATING

3.5 kW

OPERATING VOLTAGE

220 V / 380 V AC

RATED CURRENT

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

RATED TORQUE

1.68 Nm

COLLET INTERFACE

ER20 (1mm - 13mm)

Usage Scenario

Target Industry

Heavy-Duty CNC Wood Carving and Relief

Furniture and Joinery Industries

Industrial Furniture and Cabinetry Production

Commercial Signage and Displays

High-Speed MDF and Plywood Machining

Industrial Woodworking and Craftsmanship

3D Pattern Making and Prototyping

Automotive Pattern Making

Signage and Architectural Millwork

Architectural Design and Decoration

Large-Scale Panel Processing

General Engineering