---
product_id: 44561587
title: "RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor, 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine"
brand: "rattmmotor"
price: "$375.05"
currency: USD
in_stock: true
reviews_count: 3
category: "Rattmmotor"
url: https://www.desertcart.us/products/44561587-rattmmotor-4-bearings-waterproof-246mm-length-spindle-motor-2-2kw
store_origin: US
region: United States of America
---

# 2.2KW Power Boost Water-Cooled & Waterproof 4 High-Precision Bearings RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor, 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine

**Brand:** rattmmotor
**Price:** $375.05
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your precision — don’t let your CNC fall behind!

## Quick Answers

- **What is this?** RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor, 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine by rattmmotor
- **How much does it cost?** $375.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/44561587-rattmmotor-4-bearings-waterproof-246mm-length-spindle-motor-2-2kw)

## Best For

- rattmmotor enthusiasts

## Why This Product

- Trusted rattmmotor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Simplicity:** Aviation plug wiring with clear port markings for seamless inverter connection and hassle-free setup.
- • **Engineered for Stability:** Four P4 high-speed bearings guarantee minimal runout (<0.02mm) and dynamic balance for flawless accuracy.
- • **Built to Brave the Elements:** Waterproof design with stainless steel body and dust-proof cover ensures durability and rust resistance.
- • **Unmatched Power & Precision:** 2.2KW motor delivering up to 24,000 RPM for ultra-smooth, high-speed CNC milling.
- • **Optimized for Millennial Makers:** Compact 246mm length and ER20 collet compatibility perfect for professional-grade wood and metal engraving.

## Overview

The RATTMMOTOR 2.2KW 220V water-cooled spindle motor offers a robust 24,000 RPM speed with a waterproof stainless steel body and four high-quality P4 bearings. Designed for CNC milling and engraving, it ensures exceptional precision with less than 0.02mm runout, making it ideal for professional wood and metal carving applications.

## Description

desertcart.com: RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor, 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine : Tools & Home Improvement

Review: Wasn’t functional - The motor we received didn’t work. We returned it and decided to try a different brand of motor.
Review: Nice grinding spindle - This spindle appears to be properly maid. I did not use it in operation yet, but it runs pretty smoothly at various speeds all the way to 24000 RPM. I use a Hitachi WJ200 VFD to drive the motor and still need to optimize the VFD parameters. The first thing I did was to check the ER20 socket runout. It was less than .0001". A 6 mm collet, which came with the spindle, was not really 6 mm, more like 5.8 mm. But it still ran within a few tens, checked on a ground pin of appropriate diameter. I have a brand new Techniks collet, which checks very good on taper angle and runout. I have used it to check the new spindle. Taper angle looks good with "Bearing Blue" paste. The runout of the 1/2" pin in a collet varies from .0001" to .0003", measured about 1" away from the collet face. This is better than advertised and I am happy to see that. The collet nut threads are a little too sloppy for a good fit, but the runout on its OD and face is only a few tens. In addition the nut is balanced. In addition to Techniks collet I've got 2 new Chinese ER20 collets in 3/8 and 1/2" sizes from a different seller. They are made extremely poorly with tapered bores and .003-.011" runouts. My advice - stay away from such bargains. All my attempts to get any information on internal spindle construction failed. The seller does not know anything about the product. The factory promised to supply the information, but did not deliver. So the only way for me to find out the details is to take the spindle apart, and I am not ready to do that yet. My overall impression of this spindle is good, but like I said before I did not test it in real working conditions.

## Features

- ✅【How to Wire The Spindle Motor】The spindle motor's aviation plug marked with number 1, 2, 3, 4. Number 1, 2, 3 port are connected with inverter's port U, V, W respectively. Number 4 is the ground wire, no wiring is required.
- ✅【WATERPROOF Spindle】This is a waterproof 220V-2.2KW water-cooled 8A Φ 80x246mm spindle motor. Frequency is 400HZ, Precision tapered bore 0.01mm and runout off is less than 0.02mm. It is mainly suitable for non-metallic engraving, such as wood carving/engraving machine, advertisement engraving machine,CNC machine.
- ✅【24000RPM High Speed】0-24000RPM. Because it is a high-speed spindle motor, the spindle speed must not be lower than 9000 rpm during the use of the spindle. It should be noted that the spindle only can rotate clockwise but not counterclockwise.
- ✅【4pcs High Quality Bearings】P4 high speed bearing, dynamic balance, better ensure the accuracy of the spindle, powerful power, large torque, stable performance.
- ✅【Design Advantages】The design of the dust-proof cover on the front of the spindle and the use of stainless steel body can effectively prevent dust, water and rust.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071HYXK9X |
| Best Sellers Rank | #1,000,887 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #182 in Power Milling Machine Replacement Parts #16,224 in Power Tool Replacement Parts |
| Brand | RATTMMOTOR |
| Brand Name | RATTMMOTOR |
| Customer Reviews | 3.2 out of 5 stars 10 Reviews |
| Horsepower | 2.2 Kilowatts |
| Item Weight | 6.1 Kilograms |
| Manufacturer | Chang Sheng |
| Model | RTM-2.2-220V |
| Part Number | RTM-80-2.2 |
| Speed | 24000 RPM |
| UPC | 785004503039 |
| Voltage | 220 Volts |
| Wattage | 2.2 KW |

## Product Details

- **Brand:** RATTMMOTOR
- **Horsepower:** 2.2 Kilowatts
- **Item Weight:** 6.1 Kilograms
- **Speed:** 24000 RPM
- **Voltage:** 220 Volts

## Images

![RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor, 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine - Image 1](https://m.media-amazon.com/images/I/51MVoEeusXL.jpg)

## Customer Reviews

### ⭐ Wasn’t functional
*by T***Y on April 6, 2022*

The motor we received didn’t work. We returned it and decided to try a different brand of motor.

### ⭐⭐⭐⭐ Nice grinding spindle
*by E***R on July 26, 2018*

This spindle appears to be properly maid. I did not use it in operation yet, but it runs pretty smoothly at various speeds all the way to 24000 RPM. I use a Hitachi WJ200 VFD to drive the motor and still need to optimize the VFD parameters. The first thing I did was to check the ER20 socket runout. It was less than .0001". A 6 mm collet, which came with the spindle, was not really 6 mm, more like 5.8 mm. But it still ran within a few tens, checked on a ground pin of appropriate diameter. I have a brand new Techniks collet, which checks very good on taper angle and runout. I have used it to check the new spindle. Taper angle looks good with "Bearing Blue" paste. The runout of the 1/2" pin in a collet varies from .0001" to .0003", measured about 1" away from the collet face. This is better than advertised and I am happy to see that. The collet nut threads are a little too sloppy for a good fit, but the runout on its OD and face is only a few tens. In addition the nut is balanced. In addition to Techniks collet I've got 2 new Chinese ER20 collets in 3/8 and 1/2" sizes from a different seller. They are made extremely poorly with tapered bores and .003-.011" runouts. My advice - stay away from such bargains. All my attempts to get any information on internal spindle construction failed. The seller does not know anything about the product. The factory promised to supply the information, but did not deliver. So the only way for me to find out the details is to take the spindle apart, and I am not ready to do that yet. My overall impression of this spindle is good, but like I said before I did not test it in real working conditions.

### ⭐ Se quemó en menos de una semana. Tal vez el error fue mío por dejarlo solo trabajando.
*by R***S on May 6, 2022*

Se quemó muy rapido

## Frequently Bought Together

- RATTMMOTOR 4-Bearings Waterproof 246mm Length Spindle Motor CNC 2.2KW Water Cooled Spindle Motor 220V ER20 CNC Router Carved Metal Spindle Motor 24000RPM 80mm 8A 400Hz for CNC Milling Engraver Machine
- RATTMMOTOR 80mm CNC Spindle Motor Clamp Mount Bracket Support Cast Aluminium with 3pcs Screws for φ80mm 1.5KW 2.2KW CNC Router Engraver Milling Water Cooled Air Cooled Spindle Motor
- SILIVN 14pcs ER20 Spring Collet Set for CNC Engraving Machine and Milling Lathe Tool Workholding Engraving Collets (1/16",3/32",1/8",5/32",3/16",7/32",1/4",9/32",5/16",11/32",3/8",13/32",7/16",1/2")

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-05*