CNC Spindle Motor 3.7 kW, 40000 RPM, 380V Water Cooled ISO20

The 3.7 kW Water-Cooled Spindle Motor is an elite-tier industrial solution designed for applications that demand extreme rotational velocity without sacrificing power. Delivering a robust 3.7 kW output at a staggering 40,000 RPM, this motor is specifically engineered for high-performance CNC milling, drilling, and micro-machining centers. Its advanced 4-pole motor architecture operates at an ultra-high frequency of 1333 Hz, ensuring exceptional dynamic balance and stability during high-load operations. The integrated water-cooling jacket provides industry-leading thermal dissipation, crucial for maintaining the precision of the high-speed bearings during prolonged industrial duty cycles. Equipped with a precision ISO20 tool interface, this 380V spindle provides the mechanical rigidity and rotational accuracy required for superior surface finishes on complex metal and composite components.

Ultra-High Speed 40,000 RPM for precision micro-machining
High Power 3.7 kW Output for heavy-duty CNC tasks
Advanced 4-Pole Motor Architecture for enhanced stability
Extreme-Frequency 1333 Hz industrial-grade operation
ISO20 Tool Interface for high rotational accuracy
Continuous Duty Water Cooling for maximum thermal management

⚡ 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	W37400R380ISO20
POWER RATING	3.7 kW
MAX SPEED	40,000 RPM
OPERATING VOLTAGE	380 V AC
FREQUENCY	1333 Hz
POLE COUNT	4 Pole
TOOL INTERFACE	ISO20
MECHANICAL	coolingType: Water Cooled \| bodyType: High-Speed Industrial Series \| precisionGrade: High Precision Certified

Industrial Applications

Usage Scenario	Target Industry
High-Performance CNC Milling and Drilling Machines	Precision Engineering and Tooling
Heavy-Duty Industrial CNC Machining Centers	Automotive and Aerospace Manufacturing
Precision Die and Mold Fabrication	Industrial Machine Tool Production
Advanced Composite and Aluminum Routing	Advanced R&D and Prototyping
High-Velocity Parts Manufacturing	Heavy Fabrication and Metalworking
Micro-Machining for Aerospace and Medical Components	General Engineering

Technical FAQ & Operational Guide

What kind of VFD is required for a 40,000 RPM spindle?

This spindle requires a specialized high-frequency Variable Frequency Drive (VFD) capable of outputting at least 1333 Hz. Standard industrial VFDs (typically 400-600 Hz) will not be able to drive this motor to its rated speed.

Why is the 4-pole architecture significant at 40,000 RPM?

A 4-pole design provides more balanced magnetic force and higher torque stability compared to a 2-pole design at high frequencies. This reduces vibration and ensures a smoother rotational performance, which is critical for maintaining surface finish quality at 40,000 RPM.

Does this spindle require a chiller?

For a 3.7 kW motor operating at 40,000 RPM, we strongly recommend using a dedicated water chiller rather than a simple pump. A chiller allows for precise temperature control, ensuring the internal precision bearings are protected from heat-induced expansion and failure.

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 3.7 kW, 40000 RPM, 380V Water Cooled ISO20

Ultra-High Speed 40,000 RPM for precision micro-machining

High Power 3.7 kW Output for heavy-duty CNC tasks

Advanced 4-Pole Motor Architecture for enhanced stability

Extreme-Frequency 1333 Hz industrial-grade operation

ISO20 Tool Interface for high rotational accuracy

Continuous Duty Water Cooling for maximum thermal management

⚡ 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

W37400R380ISO20

POWER RATING

3.7 kW

MAX SPEED

40,000 RPM

OPERATING VOLTAGE

380 V AC

FREQUENCY

1333 Hz

POLE COUNT

4 Pole

TOOL INTERFACE

ISO20

MECHANICAL

coolingType: Water Cooled | bodyType: High-Speed Industrial Series | precisionGrade: High Precision Certified

Usage Scenario

Target Industry

High-Performance CNC Milling and Drilling Machines

Precision Engineering and Tooling

Heavy-Duty Industrial CNC Machining Centers

Automotive and Aerospace Manufacturing

Precision Die and Mold Fabrication

Industrial Machine Tool Production

Advanced Composite and Aluminum Routing

Advanced R&D and Prototyping

High-Velocity Parts Manufacturing

Heavy Fabrication and Metalworking

Micro-Machining for Aerospace and Medical Components

General Engineering