---
product_id: 109600395
title: "CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine"
brand: "cnctopbaos"
price: "€ 734.73"
currency: EUR
in_stock: true
reviews_count: 8
category: "Cnctopbaos"
url: https://www.desertcart.hr/products/109600395-cnctopbaos-k12-100mm-cnc-router-milling-machine-rotational-axis-4th
store_origin: HR
region: Croatia
---

# 65mm center height MT2 tailstock 100mm 4-jaw self-centering chuck 6:1 reduction ratio for precision control CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine

**Brand:** cnctopbaos
**Price:** € 734.73
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your CNC game with precision that commands attention!

## Quick Answers

- **What is this?** CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine by cnctopbaos
- **How much does it cost?** € 734.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/109600395-cnctopbaos-k12-100mm-cnc-router-milling-machine-rotational-axis-4th)

## Best For

- cnctopbaos enthusiasts

## Why This Product

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

## Key Features

- • **Robust Grip:** 100mm K12 4-jaw self-centering chuck clamps workpieces securely from 2mm to 90mm, maximizing versatility.
- • **Precision Perfected:** 6:1 reduction ratio ensures ultra-smooth, accurate rotational control for flawless 4th axis machining.
- • **Tailstock Stability:** MT2 live center tailstock with 65mm center height and 45mm expansion stroke guarantees steady, vibration-free support.
- • **Seamless Integration:** Compatible with NEMA 23 stepper motors and CNC routers for effortless 3D cylindrical and spiral engraving.
- • **Durable Craftsmanship:** Aluminum alloy base with rust-proof coating delivers long-lasting, wear-resistant performance under heavy use.

## Overview

The CNCTOPBAOS K12-100mm 4th Axis Rotary Table is a high-precision CNC accessory featuring a 6:1 reduction ratio, a robust 100mm 4-jaw self-centering chuck, and a stable MT2 tailstock with 65mm center height. Crafted from durable aluminum alloy with rust-proof coating, it supports complex 3D cylindrical and spiral engraving tasks with smooth, backlash-free rotation. Designed for professional CNC milling machines, it integrates seamlessly with NEMA 23 stepper motors, delivering reliable, vibration-free performance for demanding machining projects.

## Description

CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine - desertcart.com

Review: Good and Solid 4 Jaw Chuck Construction...Works as Expected! (read comment) - I received a new 4th. Axis from the seller, and this one works fine!...Kudos to the seller for sending me a new one even when I was out of the desertcart’s return window. After I opened the box and manually tested it I realized that the new one was able to spin without much effort, opposite to the first one I got that it was hard to rotate, but since I didn’t know what to expect I thought it was fine and hard to rotate due to the stepper motor (I didn’t remove it). So here is my recommendation if you get one of these: Recommendation Once you receive your package, unscrew and remove the stepper motor (completely), as if you were trying to adjust the belt tension; this shouldn’t void your warranty as you should be able to adjust the belt any time and this is not opening the spindle. Now and without the stepper motor, manually rotate the spindle/chuck; the spindle/chuck should rotate freely, without much effort but not as a skateboard wheel; great if does. Even if you feel a small amount of friction it should be fine as it should be normal on these spindles/chucks. If you have a hard time rotating it (and hear something like a clicking sound) then you should be considering exchange it. Hope this helps. Note: I’m leaving my original comment below in case you were following… Original Comment: Disappointed!...The spindle it's barely turning and seemed to got stuck only after a few times using it. this happened right after my desertcart return window expired, so I contacted the seller for diagrams to see if I could open it and do some clean up or add grease, but they do not have any. The seller suggested to "hammer the inside four claws from the front to the back" but that seems radical and I'm not certain it will not damage completely the spindle. I have seen videos of other 4th axis that they have retainers/big nuts that you unscrew to open the interior, but this model has none; not in the back or in the front, and I have not found a site or video that shows how to open any of these models. Do not recommend. UPDATE 10/9/2019 The seller contacted me again and as there are no schematics available, then it's willing to help me solve the issue in a different way; by sending me a new product for testing and review, and have expedited the shipment. I'll provide new comments an possible update the overall rating once I have tested and reviewed the new product.
Review: Very high quality with great customer support - Really nice quality for the price! The motion is very smooth, with zero perceptible backlash. Unfortunately, I did have to return it. No fault of the product itself, but due to unforeseen controller issues on my end. The unit is very difficult to backdrive, thanks to the 50:1 harmonic drive. The NEMA 23 motors may look small, but it's no issue, again, thanks to the drive ratio. If you ask nicely, the seller will provide you with a CAD file of the unit to help with programming.

## Features

- Specifications of 4th Axis: Center height: 65 mm/2.56 inch; Total height:; 115 mm/4.5 inch; Angle: 0.3°/step ; Reduction ratio: 6:1; Base Material: Aluminum alloy; Size: 210x168x115 mm/8.3x6.6x4.5 inch; Weight: 7.9 KG/17.4 LB; Inner through hole diameter/shaft hollow diameter is 22 mm/0.86 inch; Output shaft diameter:30 mm/1.18 inch
- Nema23 Stepper Motor: Phase: 2 Phase; Type: Hybrid; Step Angle: 1.8°; Current: 3.0A; Holding torque: 270oz-in/1.8Nm; Shat diameter: 8mm; 4 Lead Wires: A+ to Red ; A- to Green ; B+ to Yellow ; B- to Blue; Motor Size: 57x57x76 mm
- Specifications of MT2 Tailstock: Morse Taper 2 Live Center Movable MT2 Tailstock; Center Height: 65 mm/2.56 inch; Expansion stroke: 45 mm1.77 inch; Stretch distance: 50 mm/1.97 inch; Top tip: Activity type; With Axial locking wrench for tailstock; Exquisite workmanship,Durable,Stable performance,Sturdy and Wear-resistant; Weight: 2.5 KG/5.5 LB
- Chuck Type: K12-100 4-Jaw self-centering chuck; Diameter:100mm; Max input torque: 60 N.m; Max Speed: 3500 R/min; External jaw clamping range: 30-80 mm/1.18-3.15 inches.; Internal jaw clamping range: 2-30 mm/0.08-1.18 inches; Internal jaw jamming range: 30-90 mm/1.18-3.54 inches; With four Anti-claw and Wrench
- Advantages: Rust proof coating process,stable 4 jaw chuck structure,fine workmanship,solid and practical jaw, excellent process to maximize service life;Application: The fourth axis can be used for three-dimensional processing of cylinders, bends and circles. The fourth axis engraving machine can be used for engraving spirals, scars etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | CNCTOPBAOS |
| Compatible Devices | Milling Machine |
| Item Diameter | 1E+2 Millimeters |
| Item Weight | 10.23 Kilograms |
| Material | Aluminum |
| Thread Size | K12 |

## Product Details

- **Brand:** CNCTOPBAOS
- **Compatible Devices:** Milling Machine
- **Item Diameter:** 1E+2 Millimeters
- **Item Weight:** 10.23 Kilograms
- **Material:** Aluminum

## Images

![CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine - Image 1](https://m.media-amazon.com/images/I/61BG6gz7htL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Whats the difference between the K11 100mm chuch vs the K12 100mm chuck? Thanks.**
A: K11-100mm chuck is 3 jaw chuck,but K12-100mm chuck is 4 jaw chuck

**Q: What is the maximum size of stock that would fit in the chuck?**
A: 100MM Chuck:

Internal Jaw clamping range is 2-30mm
Internal Jaw jamming range is 30-90mm
External Jaw clamping range is 30-80mm

**Q: What all do i need to connect this to a fox alien cnc machine?**
A: match the connectors on your CNC. unplug an axis and plug it in

**Q: Could this be used for building a metal lathe?**
A: Yes,it can.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good and Solid 4 Jaw Chuck Construction...Works as Expected! (read comment)
*by A***R on October 7, 2019*

I received a new 4th. Axis from the seller, and this one works fine!...Kudos to the seller for sending me a new one even when I was out of the Amazon’s return window. After I opened the box and manually tested it I realized that the new one was able to spin without much effort, opposite to the first one I got that it was hard to rotate, but since I didn’t know what to expect I thought it was fine and hard to rotate due to the stepper motor (I didn’t remove it). So here is my recommendation if you get one of these: Recommendation Once you receive your package, unscrew and remove the stepper motor (completely), as if you were trying to adjust the belt tension; this shouldn’t void your warranty as you should be able to adjust the belt any time and this is not opening the spindle. Now and without the stepper motor, manually rotate the spindle/chuck; the spindle/chuck should rotate freely, without much effort but not as a skateboard wheel; great if does. Even if you feel a small amount of friction it should be fine as it should be normal on these spindles/chucks. If you have a hard time rotating it (and hear something like a clicking sound) then you should be considering exchange it. Hope this helps. Note: I’m leaving my original comment below in case you were following… Original Comment: Disappointed!...The spindle it's barely turning and seemed to got stuck only after a few times using it. this happened right after my Amazon return window expired, so I contacted the seller for diagrams to see if I could open it and do some clean up or add grease, but they do not have any. The seller suggested to "hammer the inside four claws from the front to the back" but that seems radical and I'm not certain it will not damage completely the spindle. I have seen videos of other 4th axis that they have retainers/big nuts that you unscrew to open the interior, but this model has none; not in the back or in the front, and I have not found a site or video that shows how to open any of these models. Do not recommend. UPDATE 10/9/2019 The seller contacted me again and as there are no schematics available, then it's willing to help me solve the issue in a different way; by sending me a new product for testing and review, and have expedited the shipment. I'll provide new comments an possible update the overall rating once I have tested and reviewed the new product.

### ⭐⭐⭐⭐⭐ Very high quality with great customer support
*by B***L on March 22, 2025*

Really nice quality for the price! The motion is very smooth, with zero perceptible backlash. Unfortunately, I did have to return it. No fault of the product itself, but due to unforeseen controller issues on my end. The unit is very difficult to backdrive, thanks to the 50:1 harmonic drive. The NEMA 23 motors may look small, but it's no issue, again, thanks to the drive ratio. If you ask nicely, the seller will provide you with a CAD file of the unit to help with programming.

### ⭐⭐⭐ Significant backlash
*by A***R on May 21, 2025*

Not sure what the other reviewers are talking about there is a ton of backlash. Out of the box the belt tension is far too low. Even after adjusting that, there is way too much backlash to use this for a proper milling set up. Not sure what it’s any good for.

## Frequently Bought Together

- CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis A 4th Axis Rotary Table 100mm 4 Jaw Chuck Dividing Head,MT2 65mm Tailstock Reducing Ratio 6:1 for CNC Engraving Machine
- STEPPERONLINE High Torque Nema 23 CNC Stepper Motor 114mm 425oz.in/3Nm CNC Mill Lathe Router

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-27*