CNC Spindle Motor 7.5 kW, 24000 RPM, 380V ER40 Water Cooled

The 7.5 kW Water-Cooled Spindle Motor is a flagship industrial solution engineered for the most intensive CNC machining applications, specifically stone carving and heavy metal engraving. This motor delivers a massive 5.76 N.m of torque, powered by a robust 4-pole design that ensures exceptional stability and material removal rates. Operating at speeds up to 24,000 RPM with a high-frequency 800 Hz input, it provides the perfect balance between rotational speed and sheer industrial power. The advanced water-cooling system allows for continuous operation during long duty cycles, preventing overheating in the most demanding environments. Equipped with a large-format ER40 collet system supporting tools up to 30mm and a premium P4 bearing configuration (2x 7008 & 2x 7005), this 24 kg spindle is built for rigid, high-precision industrial performance.

High-Capacity 7.5 kW Industrial Power
Steady 24000 RPM for stone and metalwork
Superior 4-Pole High-Torque Architecture (5.76 N.m)
High-Frequency 800 Hz Stable Operation
Continuous Duty Water Cooling System
Large ER40 Collet interface (3mm to 30mm)

⚡ 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	W75240R380M140
POWER RATING	7.5 kW
MAX SPEED	24000 RPM
OPERATING VOLTAGE	380 V AC
RATED CURRENT	15.0 A
FREQUENCY	800 Hz
RATED TORQUE	5.76 N.m
POLE COUNT	4 Pole
COLLET INTERFACE	ER40 (3mm - 30mm)
BEARING CONFIGURATION	2 x 7008 P4 (Front), 2 x 7005 P4 (Rear)
MECHANICAL	weight: 24 Kg \| coolingType: Water Cooled \| bodyType: Heavy-Duty Industrial

Industrial Applications

Usage Scenario	Target Industry
Industrial Stone Carving and Granite Milling	Stone Fabrication and Masonry
Heavy-Duty Metal Engraving and Die Making	Die and Mold Manufacturing
Large-Format CNC Router Manufacturing	Industrial Machine Building
Hardwood Sculpting and Relief Carving	Aerospace and Tooling Engineering
Advanced Prototyping and Tooling	Large-Scale Furniture Production
3D Architectural Model Machining	General Engineering

Technical FAQ & Operational Guide

What tools can I use with the ER40 collet?

The ER40 collet system is designed for heavy-duty industrial work and can accommodate tool shanks ranging from 3mm up to 30mm, allowing for very large material removal bits.

Why is the 4-pole design important for stone carving?

A 4-pole design provides much higher torque (5.76 N.m) compared to standard 2-pole motors. This ensures the spindle can maintain its RPM while cutting through hard materials like stone and granite without stalling.

What type of VFD is required for this 7.5kW motor?

You will need a high-frequency Variable Frequency Drive (VFD) rated for at least 7.5kW (10HP) that supports an 800 Hz output frequency and 380V 3-phase input.

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 7.5 kW, 24000 RPM, 380V ER40 Water Cooled

High-Capacity 7.5 kW Industrial Power

Steady 24000 RPM for stone and metalwork

Superior 4-Pole High-Torque Architecture (5.76 N.m)

High-Frequency 800 Hz Stable Operation

Continuous Duty Water Cooling System

Large ER40 Collet interface (3mm to 30mm)

⚡ 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

W75240R380M140

POWER RATING

7.5 kW

MAX SPEED

24000 RPM

OPERATING VOLTAGE

380 V AC

RATED CURRENT

15.0 A

FREQUENCY

800 Hz

RATED TORQUE

5.76 N.m

POLE COUNT

4 Pole

COLLET INTERFACE

ER40 (3mm - 30mm)

BEARING CONFIGURATION

2 x 7008 P4 (Front), 2 x 7005 P4 (Rear)

MECHANICAL

weight: 24 Kg | coolingType: Water Cooled | bodyType: Heavy-Duty Industrial

Usage Scenario

Target Industry

Industrial Stone Carving and Granite Milling

Stone Fabrication and Masonry

Heavy-Duty Metal Engraving and Die Making

Die and Mold Manufacturing

Large-Format CNC Router Manufacturing

Industrial Machine Building

Hardwood Sculpting and Relief Carving

Aerospace and Tooling Engineering

Advanced Prototyping and Tooling

Large-Scale Furniture Production

3D Architectural Model Machining

General Engineering