---
product_id: 69170525
title: "2PCs 8mm x 300mm (.315 x 11.81 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance"
brand: "reliabot"
price: "฿1696"
currency: THB
in_stock: true
reviews_count: 8
category: "Relia Bot"
url: https://www.desertcart.co.th/products/69170525-2pcs-8mm-x-300mm-315-x-11-81-inches-case
store_origin: TH
region: Thailand
---

# 8mm diameter precision Case hardened chrome plating Chamfered ends for easy install 2PCs 8mm x 300mm (.315 x 11.81 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance

**Brand:** reliabot
**Price:** ฿1696
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your linear motion game with precision and durability that professionals trust!

## Quick Answers

- **What is this?** 2PCs 8mm x 300mm (.315 x 11.81 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance by reliabot
- **How much does it cost?** ฿1696 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/69170525-2pcs-8mm-x-300mm-315-x-11-81-inches-case)

## Best For

- reliabot enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Pros:** Top-rated with 4.7 stars from 563 reviews, praised for unmatched straightness and quality.
- • **Precision Perfected:** Metric h8 tolerance ensures ultra-accurate 8mm diameter fit for seamless linear motion.
- • **Durability Meets Design:** Case hardened chrome plating boosts surface hardness for long-lasting, wear-resistant performance.
- • **User-Friendly Installation:** Chamfered ends protect your fingers and simplify linear bearing assembly.
- • **Reliable Length Consistency:** 300mm length with ±0.5mm tolerance guarantees dependable sizing for your projects.

## Overview

This 2-piece set of 8mm diameter, 300mm long linear motion rod shafts features carbon steel construction with case hardened chrome plating for enhanced hardness and wear resistance. With metric h8 tolerance ensuring tight diameter precision and chamfered ends for safe, easy installation, these rods deliver exceptional straightness and reliability, backed by over 560 positive reviews.

## Description

Packing list: 2 * Diameter 8mm Linear Motion Shaft 300mm long

Review: Straightest rods I have ever tested. Excellent customer service - I have tested several rods using a dial indicator to check for straightness. I use the HF digital dial indicator on a magnetic stand. The key to getting consistent results is to have a follower that rides on top of the rod so that minor xy position error does not affect the dial indicator reading. I use a piece of glass as it provides a perfectly flat surface to the rod. Good stock rods are typically <0.05mm out of round. Unfortunately one of my boxes was damaged in shipping, but one of the rods was undamaged. It measured better than 0.01mm!. The second set of rods arrived in perfect condition with high denisty foam separating the rods and protecting them from the box at 5 different points. Customer service was excellent for the damaged box. I will update when I get a chance to test the second set of rods
Review: Perfect for my project - These were perfect for my project, which is a custom start gate for a Pinewood Derby track. Both rods were perfectly straight. They cut easily with my chop saw and a 7" diamond metal cutting blade. Dimensions were as advertised. Shipped promptly and arrived on time.

## Features

- The material is carbon steel, which is very suitable for linear motion rod.
- The surface has been chrome plated to enhance the hardness.
- Chamfer on both ends, easier to install linear bearings and won't hurt fingers when installing it.
- Diameter 8mm, tolerance -0.005mm to -0.03mm ( 7.995mm - 7.97mm)
- Length 300mm, tolerance ± 0.5mm ( 299.5mm - 300.5mm )

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.7 out of 5 stars 563 Reviews |

## Images

![2PCs 8mm x 300mm (.315 x 11.81 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance - Image 1](https://m.media-amazon.com/images/I/51VOxQw2vVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Straightest rods I have ever tested. Excellent customer service
*by M***B on September 20, 2019*

I have tested several rods using a dial indicator to check for straightness. I use the HF digital dial indicator on a magnetic stand. The key to getting consistent results is to have a follower that rides on top of the rod so that minor xy position error does not affect the dial indicator reading. I use a piece of glass as it provides a perfectly flat surface to the rod. Good stock rods are typically <0.05mm out of round. Unfortunately one of my boxes was damaged in shipping, but one of the rods was undamaged. It measured better than 0.01mm!. The second set of rods arrived in perfect condition with high denisty foam separating the rods and protecting them from the box at 5 different points. Customer service was excellent for the damaged box. I will update when I get a chance to test the second set of rods

### ⭐⭐⭐⭐⭐ Perfect for my project
*by R***O on October 2, 2019*

These were perfect for my project, which is a custom start gate for a Pinewood Derby track. Both rods were perfectly straight. They cut easily with my chop saw and a 7" diamond metal cutting blade. Dimensions were as advertised. Shipped promptly and arrived on time.

### ⭐⭐⭐⭐⭐ Seems to be good
*by J***C on October 30, 2022*

Rods were of consistent size and straight, time will tell how they will wear but I'm optimistic.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/69170525-2pcs-8mm-x-300mm-315-x-11-81-inches-case](https://www.desertcart.co.th/products/69170525-2pcs-8mm-x-300mm-315-x-11-81-inches-case)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-08*