--- product_id: 140226685 title: "300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer" brand: "motou" price: "$4.73" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/140226685-300mm-8mm-t8-lead-screw-set-lead-screw-copper-nut store_origin: US region: United States of America --- # 300mm precision length 8mm stainless steel lead screw Complete 6-piece installation kit 300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer **Brand:** motou **Price:** $4.73 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your 3D printing game with precision and durability you can trust! ## Quick Answers - **What is this?** 300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer by motou - **How much does it cost?** $4.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/140226685-300mm-8mm-t8-lead-screw-set-lead-screw-copper-nut) ## Best For - motou enthusiasts ## Why This Product - Trusted motou brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Rustproof Build:** Stainless steel screw and brass nut combo ensures long-lasting, maintenance-free performance. - • **Optimized Load Capacity:** Engineered for large mechanical advantage and heavy load handling without compromising speed. - • **Precision Linear Motion:** Experience ultra-smooth, accurate Z-axis control for flawless 3D prints every time. - • **Whisper-Quiet Operation:** Low friction design minimizes noise and vibration, perfect for professional-grade 3D printing environments. - • **All-in-One Installation Kit:** Includes lead screw, copper nut, coupler, pillow bearing blocks, and hex wrench for seamless setup. ## Overview This 300mm T8 lead screw set features an 8mm stainless steel screw paired with a brass nut, designed for precise and smooth linear motion ideal for 3D printer Z-axis applications. The rustproof materials and low-friction design ensure long service life and quiet operation. The package includes all necessary components—copper nut, coupler, pillow bearing blocks, and hex wrench—making it a complete, ready-to-install solution for enhanced mechanical performance. ## Description Specifications: Screw Material: Stainless Steel Nut Material: Brass Diameter: 8mm Nut Diameter: 22mm Length: 300mm Pillow Flange Inner Diameter≈10mm Pillow Flange Outer Diameter≈36mm Package Included: - 1×T8-300mm Lead Screw - 1×Copper Nut - 1×Coupler - 2×Pillow Bearing Block - 1Hexagon wrench Review: Five Stars, but with three caviats... - I found this to be a complete, nicely machined collection of parts that fully met my needs, and I gave it five stars. However, be aware that: (1) The rod, itself, is 300mm, but the working range is at best 260mm, after the pillow blocks and coupling are installed (as skinny as possible). Obvious, but not stated anywhere in the description. (2) The brass traveler nut is not a zero-backlash device. Hard to measure it, but clearly visible playing with a loose nut on the rod. One trick: don't mount the nut with perfect axial alignment. Tilt it a bit with shim stock until you get the right combination of backlash and friction for your application. Expect wear. (3) The provided Allen wrench for the pillow block setscrews was too small to work properly--it simply cammed in the hole. I measured it as 1.46mm (flat to flat), but the setscrews appear to be 1/16". My 1/16" Allen wrench (measured at 1.57mm) fit perfectly and got the job done. Review: Nice lead screw - The lead screw are straight, properly threaded, right thread pitch and of a nice quality. The nut glides smoothly down the threads without needing to oil or clean it first. I used this as my Z axis on a cnc, have a good result. And they’re a good fit at a decent price. I am very happy with the quality and price. ## Features - Lead Screw Set, compact, large load carrying capability, rustproof and long service life. - Precise and accurate linear motion, large mechanical advantage. - T8 brass nut, with 4 holes for fixing to the machine. - Smooth, quiet, low friction,and low maintenance, very suitable for 3D printer z axis. - Widely used in 3D Printer, stepper motor, machine tools, and other equipment. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07S1LKMQ6 | | Best Sellers Rank | #597,506 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #92 in Linear Motion Lead Screws | | Brand | MOTOU | | Color | Silver, Brass | | Compatible Groove Diameter | 8 Millimeters | | Customer Reviews | 4.3 4.3 out of 5 stars (164) | | Fastener Type | Flange | | Finish Types | Stainless Steel" or "Passivated | | Item Diameter | 8 Millimeters | | Item Shape | Round | | Manufacturer | MOTOU | | Material Type | Brass, Stainless Steel | | Number of Pieces | 6 | | Screw Head Style | Hex | | Size Name | One Size | | Thread Size | M8 | | UPC | 791300576783 | ## Product Details - **Brand:** MOTOU - **Color:** Silver, Brass - **Fastener Type:** Flange - **Material:** Brass, Stainless Steel - **Size:** One Size ## Images ![300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer - Image 1](https://m.media-amazon.com/images/I/51TT5SSR3TL.jpg) ![300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer - Image 2](https://m.media-amazon.com/images/I/51qRjLxpcoL.jpg) ![300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer - Image 3](https://m.media-amazon.com/images/I/51LLKLwUkrL.jpg) ![300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer - Image 4](https://m.media-amazon.com/images/I/51qzo-mKD7L.jpg) ![300mm 8mm T8 Lead Screw Set Lead Screw+ Copper Nut + Coupler+Hexagon Wrench + Pillow Bearing Block for 3D Printer - Image 5](https://m.media-amazon.com/images/I/51uVhjQKGXL.jpg) ## Questions & Answers **Q: What is the pitch?** A: 2mm **Q: Will this work as a replacement T8 screw for the Ender 3?** A: sorry yes this is a 4 start screw good for dual z application on the ender 3 **Q: Is the coupler 8mm to 5mm? It looks like it in the picture, but does not say anywhere.** A: yes mine was, they should mention that in the description but be aware, they could change couplers from when I got mine. I'd say get this kit but be ready to get a coupler just in case. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Five Stars, but with three caviats... *by J***R on February 26, 2023* I found this to be a complete, nicely machined collection of parts that fully met my needs, and I gave it five stars. However, be aware that: (1) The rod, itself, is 300mm, but the working range is at best 260mm, after the pillow blocks and coupling are installed (as skinny as possible). Obvious, but not stated anywhere in the description. (2) The brass traveler nut is not a zero-backlash device. Hard to measure it, but clearly visible playing with a loose nut on the rod. One trick: don't mount the nut with perfect axial alignment. Tilt it a bit with shim stock until you get the right combination of backlash and friction for your application. Expect wear. (3) The provided Allen wrench for the pillow block setscrews was too small to work properly--it simply cammed in the hole. I measured it as 1.46mm (flat to flat), but the setscrews appear to be 1/16". My 1/16" Allen wrench (measured at 1.57mm) fit perfectly and got the job done. ### ⭐⭐⭐⭐⭐ Nice lead screw *by L***U on August 5, 2019* The lead screw are straight, properly threaded, right thread pitch and of a nice quality. The nut glides smoothly down the threads without needing to oil or clean it first. I used this as my Z axis on a cnc, have a good result. And they’re a good fit at a decent price. I am very happy with the quality and price. ### ⭐⭐⭐⭐ Does not fit on ender 3 *by A***R on November 14, 2022* Product is high quality and straight, though it doesn't fit on an ender 3. It's too short --- ## 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.us/products/140226685-300mm-8mm-t8-lead-screw-set-lead-screw-copper-nut](https://www.desertcart.us/products/140226685-300mm-8mm-t8-lead-screw-set-lead-screw-copper-nut) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-22*