--- product_id: 231035979 title: "MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type)" brand: "simax3d" price: "S/.150" currency: PEN in_stock: true reviews_count: 9 category: "Simax3 D" url: https://www.desertcart.pe/products/231035979-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-with-mgn12h store_origin: PE region: Peru --- # 300mm precision M3 T nut compatibility H-Type sliding block MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) **Brand:** simax3d **Price:** S/.150 **Availability:** ✅ In Stock ## Summary > 🚀 Slide into Precision! ## Quick Answers - **What is this?** MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) by simax3d - **How much does it cost?** S/.150 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/231035979-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-with-mgn12h) ## Best For - simax3d enthusiasts ## Why This Product - Trusted simax3d brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Design:** Equipped with rubber stoppers to ensure your sliding block stays securely in place, preventing any mishaps. - • **Easy Installation:** Compatible with M3 T nuts and screws, making setup a breeze for your 3D printer or CNC machine. - • **Quality Assurance:** Crafted for durability, this linear guideway is built to withstand the demands of your creative endeavors. - • **Precision Engineering:** Experience unparalleled accuracy with a 300mm MGN12 linear rail, designed for optimal performance. - • **Versatile Application:** Perfectly suited for both hobbyists and professionals, enhancing your projects with smooth linear motion. ## Overview The MGN12 Linear Rail Guide is a 300mm sliding guideway designed for 3D printers and CNC machines, featuring an MGN12H sliding block. It includes rubber stoppers for safety and is compatible with M3 T nuts and screws for easy installation. Ideal for both professional and hobbyist applications, this product ensures smooth and accurate linear motion. ## Description MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type): desertcart.com: Industrial & Scientific Review: Good quality - I'm a CNC machinist and know good and bad quality rails and these are probably 8 out of 10 quality. Put them on my ender 3v2 for Y Axis and printed rail attachments to fit them to it. Review: BEST PROTECTIVE PACKAGING....WOW ! - THE PACKAGING WAS THE BEST I'VE SEEN OR RECEIVED FROM CHINA OR THE USA...HIGH DENISITY OPEN CELL FOAM COVERED THE RAIL AND CARRAIGES....DEFECT FREE FROM CHINA...AND, THE LINEAR BEARING RAIL AND CARRAIGES WORK WELL TOO. JOHN HARRA ## Features - Packing List: 300mm MGN12 Linear Rail*1, MGN12H Sliding Block*1 - Notification: There's size note in picture, make sure you get the correct size. - Recommendation: Please use M3 T nut and screw to fix the linear rail for 20 series EU Al-profile. - Good Details: There are two rubber stoppers on each side of the linear rail to prevent the sliding block from falling out. - MGN12H Linear Slide 300MM Note: Please use M3 T nut and screw to fix the linear rail for 20 series EU Al-profile. ## Product Details - **Brand:** SIMAX3D - **Material:** Stainless Steel - **Bearing Number:** MGN12001 - **Bearing Type:** Linear Bearing - **Compatible Lubricant:** Grease ## Images ![MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 1](https://m.media-amazon.com/images/I/41D4XlgXgyL.jpg) ![MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 2](https://m.media-amazon.com/images/I/51L44j-haUL.jpg) ![MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 3](https://m.media-amazon.com/images/I/51aLzkbeYvL.jpg) ![MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 4](https://m.media-amazon.com/images/I/51xyfjGCZvL.jpg) ![MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 5](https://m.media-amazon.com/images/I/41-Av6ejkUL.jpg) ## Available Options This product comes in different **Color, Size, Number Of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality *by V***R on June 25, 2023* I'm a CNC machinist and know good and bad quality rails and these are probably 8 out of 10 quality. Put them on my ender 3v2 for Y Axis and printed rail attachments to fit them to it. ### ⭐⭐⭐⭐⭐ BEST PROTECTIVE PACKAGING....WOW ! *by J***A on March 2, 2022* THE PACKAGING WAS THE BEST I'VE SEEN OR RECEIVED FROM CHINA OR THE USA...HIGH DENISITY OPEN CELL FOAM COVERED THE RAIL AND CARRAIGES....DEFECT FREE FROM CHINA...AND, THE LINEAR BEARING RAIL AND CARRAIGES WORK WELL TOO. JOHN HARRA ### ⭐⭐⭐ ok if you like rebuilding rails *by J***Y on April 14, 2026* were missing balls in every one of 3 and would have binding when reversing directions, they have very little preload so they have deflection and will freefall when clean. I replaced all the balls with g10 and they are ok enough for my z axis now ## Frequently Bought Together - MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Key-Bak Super48 HD 8oz. Locking Retractable Key Holder, 48" Retractable Cord, Black Polycarbonate Case, Steel Belt Clip, Oversized Split Ring --- ## 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.pe/products/231035979-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-with-mgn12h](https://www.desertcart.pe/products/231035979-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-with-mgn12h) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-08-05*