---
product_id: 328337853
title: "CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine"
brand: "cnctopbaos"
price: "$1427"
currency: NZD
in_stock: true
reviews_count: 5
category: "Cnctopbaos"
url: https://www.desertcart.nz/products/328337853-cnctopbaos-k12-100mm-cnc-router-milling-machine-rotational-axis-4th
store_origin: NZ
region: New Zealand
---

# 0.3° micro-step angle for ultra-fine control 100mm K12 4-jaw self-centering chuck 6:1 precision reduction ratio CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine

**Brand:** cnctopbaos
**Price:** $1427
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your CNC game with precision that turns heads!

## Quick Answers

- **What is this?** CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine by cnctopbaos
- **How much does it cost?** $1427 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/328337853-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

- • **Built to Last:** Crafted from durable aluminum alloy with rust-proof coating, this rotary table is designed for long-term, professional-grade CNC use.
- • **Precision Perfected:** Experience ultra-smooth 0.3° step increments for flawless 4-axis CNC engraving and milling.
- • **Tailstock Stability:** MT2 live center tailstock with 50mm expansion stroke locks your workpiece firmly, minimizing vibration and maximizing accuracy.
- • **Robust Chuck Control:** Secure your workpiece with the 100mm K12 4-jaw self-centering chuck, engineered for max torque up to 60 N·m.
- • **Powerful Stepper Motor:** NEMA23 hybrid stepper motor delivers 270 oz-in holding torque, ensuring stable and reliable rotational performance.

## Overview

The CNCTOPBAOS K12-100mm 4th Axis Rotary Table is a professional-grade CNC accessory featuring a 6:1 reduction ratio, a robust 100mm 4-jaw self-centering chuck, and a powerful NEMA23 stepper motor. Designed with a 0.3° step angle for ultra-fine control, it includes an MT2 live center tailstock for enhanced stability. Constructed from aluminum alloy with rust-proof coating, this rotary axis enables precise 3D cylindrical and spiral engraving, ideal for advanced CNC milling and engraving applications.

## Description

Package include:1set 4th axis K12 100mm ( Includes stepper motor and 4 jaw chuck) Ratio 6:11 x 65mm MT2 Tailstock Descriptions:Chuck type: K12 100mm 4 jaw centering chuckCenter height: 65mmTotal height: 115mmAngle: 0.3°/ step Gear box output shaft diameter: 25mmReducing ratio: 6:1(belt deceleration mode)Stepper motor: Nema23 57mm 3A 2-phase 4 wireAccessories: Set of Anti-claw and wrenchesThe fourth axis parameter settings:Mach3 system settings: the pulses required for 1°(Motor 1 lap pulses x Driver fine fraction x Reduction ratio) ÷ 360°For example: 57mm 2- phase stepper motor, fine fraction of 16, reduction ratio 6:1(200 x 16 x 6 ) / 360=53.33333)Weihong system settings: 1 pulse along the angle 360°/(Motor 1 lap pulses x Driver fine fraction x Reduction ratio)For example: 57mm 2- phase stepper motor, fine fraction of 16, reduction ratio 6:1360 / (200 x 16 x 6) =0.001875Tailstock type MT2Center Height: 65mmStretch distance: 50mmTop tip: Activity typeAxial locking wrench for tailstockNema23 stepper motor 76mm Shaft Diameter: 8 mmStep Angle:1.8Current: 3ATemperature Rise: 80 c maxInsulation Resistance: 100MOhm(500V DC)Holding Torque: 18kg.cm

Review: 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: 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 |
|---------------|-------|
| ASIN | B07B2RX1BK |
| ASIN  | B07B2RX1BK |
| Batteries Included? | No |
| Batteries Required? | No |
| Capacity | 100 Millimeters |
| Customer Reviews | 4.1 4.1 out of 5 stars (41) |
| Customer reviews | 4.1 4.1 out of 5 stars (41) |
| Cutting Diameter | 1E+2 Millimeters |
| Date First Available | 12 February 2019 |
| Date First Available  | 12 February 2019 |
| Included components | 4th axis K12 100mm, stepper motor, 4 jaw chuck, 65mm Tailstock |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 10.2 Kilograms |
| Item model number | S23 |
| Item model number  | S23 |
| Manufacturer | CNCTOPBAOS |
| Manufacturer  | CNCTOPBAOS |
| Package Dimensions | 43.18 x 30.48 x 22.86 cm; 10.23 kg |
| Package Dimensions  | 43.18 x 30.48 x 22.86 cm; 10.23 kg |
| Part number | S23 |
| Pattern | 4th-A |
| Style | Style-4th-A |
| UPC | 785004502711 |

## 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 4th Axis A axis Rotary Table A axis 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)
![CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine - Image 2](https://m.media-amazon.com/images/I/717T8f-Q3zL.jpg)
![CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine - Image 3](https://m.media-amazon.com/images/I/71N91XyKWeL.jpg)
![CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine - Image 4](https://m.media-amazon.com/images/I/61IWj4SluaL.jpg)
![CNCTOPBAOS K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head,MT2 65mm Tailstock Reducing ratio 6:1 for CNC Engraving Machine - Image 5](https://m.media-amazon.com/images/I/71x3NjwWfQL.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

### ⭐⭐⭐⭐⭐ Review
*by A***R on 7 October 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.

### ⭐⭐⭐⭐⭐ Review
*by B***L on 22 March 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.

### ⭐⭐⭐ Review
*by A***R on 21 May 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-27*