--- product_id: 408258914 title: "Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench" brand: "sydien" price: "€ 80.84" currency: EUR in_stock: true category: "Sydien" url: https://www.desertcart.com.cy/products/408258914-sydien-4-pcs-8mm-rigid-flange-shaft-coupling-motor-guide store_origin: CY region: Cyprus --- # 8mm precision inner diameter M4 fastening & fixing screws Hardened electroplated alloy steel Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench **Brand:** sydien **Price:** € 80.84 **Availability:** ✅ In Stock ## Summary > ⚙️ Lock in precision, power your projects with Sydien! ## Quick Answers - **What is this?** Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench by sydien - **How much does it cost?** € 80.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/408258914-sydien-4-pcs-8mm-rigid-flange-shaft-coupling-motor-guide) ## Best For - sydien enthusiasts ## Why This Product - Trusted sydien brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Fastening System:** Dual M4 screw holes provide rock-solid stability and easy installation. - • **Versatile Compatibility:** Ideal for RC models and industrial motor shafts, making your setup future-proof and professional-grade. - • **Precision Engineered Fit:** 8mm inner diameter ensures seamless shaft alignment for flawless motor performance. - • **Complete Installation Kit:** Includes 4 couplings, 10 screws, and a mini hex wrench—everything you need to upgrade instantly. - • **Premium Heat-Treated Alloy:** Durable, electroplated metal resists wear and corrosion for long-lasting reliability. ## Overview The Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling set features heat-treated, electroplated alloy steel couplers with an 8mm inner diameter and M4 fastening screws. Designed for secure shaft-to-plane connections, it includes 4 couplings, 10 screws, and a mini hex wrench, delivering durable, precise, and easy-to-install components perfect for RC motors and industrial applications. ## Description Features 1.Fine plating metal, hardened by heat treatment, and then electroplated. 2.A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. 3.Durable and insulation, make your shaft more stable, easy to install and replace. 4.Suitable for model shaft connection, perfect accessories for RC Model motor, etc. Product Specifications Product Name:Rigid Flange Shaft Coupling. Colour:Silver. Dimension: -Inner Diameter:8mm/0.31''. -Fastening Screw Hole:M4. -Base Fixing Screw Hole:M4. -Cylinder Outer Diameter:16mm/0.63''. -Cylinder Height:10mm/0.39''. -Base Diameter:32mm/1.26''. -Base Height:3mm/0.12''. Package Content:4Pcs Flange Shaft Coupling + 1Pc Mini Hex Wrench + 10Pcs Fastening Screw 😊We promise to provide 100% after-sales service for all customers. If you think the product you received is not suitable for you or not satisfied, please let us know. Our team will respond within 24 hours.😉 If you have any problems, we are very willing to solve the problems for you.♥ ## Features - Inner Diameter:8mm/0.31'';Fastening Screw Hole: M4;Base Fixing Screw Hole: M4. - Cylinder Outer Diameter:16mm/0.63'';Cylinder Height:10mm/0.39'';Base Diameter:32mm/1.26'';Base Height:3mm/0.12''. - Metal: Fine plating metal, hardened by heat treatment, and then electroplated. - Function: A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. - Package: 4 x Flange Shaft Coupling + 1 x Mini Hex Wrench + 10 x Fastening Screw ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07R8CJ36F | | ASIN | B07R8CJ36F | | Brand | Sydien | | Color | 8mm | | Compatible Groove Diameter | 3.18 Millimeters | | Customer Reviews | 4.7 4.7 out of 5 stars (105) | | Customer reviews | 4.7 4.7 out of 5 stars (105) | | Drive Style | External Hex | | Exterior Finish | Silver | | Fastener Type | Coupling, Flange, Hex | | Finish Types | electroplated | | Grade Rating | industrial | | Inside Thread Size | M8 | | Item Diameter | 8 Millimeters | | Item Dimensions | 32 millimeters | | Manufacturer | Sydien | | Manufacturer | Sydien | | Material Type | steel | | Metal Type | Alloy Steel, Aluminum, Copper | | Number of Pieces | 4 | | Thread Class | Fine | | Thread Size | M 4 | | Thread Style | Right Hand | | Thread Type | Iso Metric | | UPC | 745679813604 | ## Product Details - **Colour:** 8mm - **Exterior finish:** Silver - **Fastener type:** Coupling, Flange, Hex - **Material:** steel - **Thread size:** M 4 ## Images ![Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 1](https://m.media-amazon.com/images/I/41LQFz1qSCL.jpg) ![Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 2](https://m.media-amazon.com/images/I/31RB3nRpbjL.jpg) ![Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 3](https://m.media-amazon.com/images/I/513RPr56OnL.jpg) ![Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 4](https://m.media-amazon.com/images/I/51CX2JrXe-L.jpg) ![Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 5](https://m.media-amazon.com/images/I/41e8EhnYZeL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: What are the positions of the 4 holes on the base for the 4mm part? Are there drawings available anywhere?** A: Dear customer, the inner diameter is 4mm; the outer diameter of the cylinder is 10mm, the height of the cylinder is 10mm, the overall height is 12mm, and the distance between the opposite sides of the base is 16mm. The fixing hole screw is M3, the diameter of the chassis is 22mm, and the height of the chassis is 2mm. **Q: What is the diameter of the hole pattern (4 holes) for the 5mm model? In other words, the distance between the center of two holes that are opposite** A: Hello, the diameter of the chassis hole of M5 is 16mm, and the mounting screw of the hole is M3, thank you. **Q: Why is it so hard to include the dimension for the 4 mounting holes in the product description? I see all the other relevant measurements.** A: Dear customer, the product has 4 holes, the size is described in the data, please refer to it. ## Frequently Bought Together - Sydien 4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - BRINGSMART A58SW31ZY 12V DC Worm Gear Motor Self-Locking Reversed Mini Turbine Geared Motor for DIY Robot Rotating Table Door Lock Curtain Machine (12V 260rpm) - Bringsmart 370 Mounting Bracket with Screw Worm Gear Motor Fixed Fastener DIY Parts DC Motor Holder (Single-Side Bracket) --- ## 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.com.cy/products/408258914-sydien-4-pcs-8mm-rigid-flange-shaft-coupling-motor-guide](https://www.desertcart.com.cy/products/408258914-sydien-4-pcs-8mm-rigid-flange-shaft-coupling-motor-guide) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-09-05*