---
product_id: 128018107
title: "2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects"
brand: "invento"
price: "R322"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Invento"
url: https://www.desertcart.co.za/products/128018107-2pcs-en31-rustproof-steel-smooth-rod-8mm-od-400mm-0
store_origin: ZA
region: South Africa
---

# 8mm OD precision diameter 400mm length for versatile builds EN31 hard chromed rustproof steel 2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects

**Brand:** invento
**Price:** R322
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your robotics game with precision rods that never rust!

## Quick Answers

- **What is this?** 2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects by invento
- **How much does it cost?** R322 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/128018107-2pcs-en31-rustproof-steel-smooth-rod-8mm-od-400mm-0)

## Best For

- invento enthusiasts

## Why This Product

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

## Key Features

- • **Dual Pack Value:** Two rods included to double your build potential or spare for future projects.
- • **Trusted by Makers:** Highly rated with 4.3 stars and praised for straightness and quality by CoreXY builders.
- • **Rustproof Durability:** Hard chromed EN31 steel ensures long-lasting corrosion resistance and smooth operation.
- • **Precision Perfect Diameter:** Engineered at a consistent 8mm OD for flawless CNC and robotics alignment.
- • **Optimal Length for DIY Mastery:** 400mm rods designed to fit a wide range of 3D printer and CNC projects with ease.

## Overview

These 2pcs EN31 rustproof steel smooth rods measure 8mm in diameter and 400mm in length, crafted from hard chromed EN31 steel for superior durability and corrosion resistance. Ideal for CNC machines, 3D printers, and robotics DIY projects, they deliver precision and reliability, backed by strong user reviews and a trusted brand.

## Description

Outside Diameter: 8mm Length: 400 mm (0.4 meter) Material: EN-31 (Hard Chromed) Qty: 2pcs Application: 3D Printer, CNC, Robotics, DIY Projects etc

Review: Finishing and quality - Good finishing and quality
Review: Quality - Recently I ordered these 8mmOD 400mm long smooth rods 6 pieces for my CoreXY build and I got all 6 rods in excellent condition, all straight and no rust. Definitely go for them.

## Features

- Outside Diameter: 8mm
- Length: 400 mm (0.4 meter)
- Material: EN-31 (Hard Chromed)
- Qty: 2pcs
- Application: 3D Printer, CNC, Robotics, DIY Projects etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RR14N72 |
| Best Sellers Rank | #5,974 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #130 in Robotic Kits & Accessories |
| Brand | INVENTO |
| Brand Name | INVENTO |
| Country of Origin | India |
| Customer Reviews | 4.3 out of 5 stars 101 Reviews |
| Importer Contact Information | INVENTO |
| Item Diameter | 8 Millimetres |
| Item Dimensions | 40 x 0.8 x 0.8 Centimeters |
| Item Form | Rod |
| Item Shape | Cylindrical |
| Item Thickness | 8 Millimetres |
| Item Type Name | INVENTO 2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects |
| Item Weight | 500 Grams |
| Item dimensions L x W x H | 40 x 0.8 x 0.8 Centimeters |
| Manufacturer | INVENTO, INVENTO SALES CORPORATION |
| Manufacturer Contact Information | INVENTO SALES CORPORATION |
| Model Number | ISC 1483 |
| Number of Items | 2 |
| Packer Contact Information | INVENTO |
| Part Number | ISC 1483 |
| Shape | Cylindrical |
| Unit Count | 2 Count |

## Product Details

- **Brand:** INVENTO
- **Item Diameter:** 8 Millimetres
- **Item Thickness:** 8 Millimetres
- **Item dimensions L x W x H:** 40 x 0.8 x 0.8 Centimeters
- **Shape:** Cylindrical

## Images

![2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects - Image 1](https://m.media-amazon.com/images/I/41g5ZIMzgoL.jpg)
![2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects - Image 2](https://m.media-amazon.com/images/I/61AATfaQYRL.jpg)
![2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects - Image 3](https://m.media-amazon.com/images/I/51GOUurGtUL.jpg)
![2pcs EN31 Rustproof Steel Smooth Rod 8mm OD 400mm (0.4 mtr) Long for CNC Robotics Machines DIY Projects - Image 4](https://m.media-amazon.com/images/I/31KRI9Nn2AL.jpg)

## Questions & Answers

**Q: is it stainless steel**
A: Invento EN31 steel rod is not Stainless Steel. 
Normal Carbon Steel is an alloy of Iron and Carbon. Stainless Steel should contain at least 10.5% Chromium and less than 1.2% Carbon. 
EN31 steel contains 1.4% Chromium, 0.5% Manganese, 0.2% Silicon and 1% Carbon. 
Invento EN31 steel rod is 'hard chrome plated' and used in industrial applications for its hardenability, wear resistance and corrosion resistance. 
For normal applications EN31 steel rod is rustproof and abrasion resistant.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Finishing and quality
*by J***R on 26 April 2026*

Good finishing and quality

### ⭐⭐⭐⭐⭐ Quality
*by S***M on 19 March 2026*

Recently I ordered these 8mmOD 400mm long smooth rods 6 pieces for my CoreXY build and I got all 6 rods in excellent condition, all straight and no rust. Definitely go for them.

### ⭐⭐⭐⭐ Good product
*by N***J on 16 November 2021*

Value for money

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-06-18*