--- product_id: 147691907 title: "Sydien 4Pcs 3.17mm to 4mm Bore Rotatable Universal Joint Coupling RC Robot Boat Car Shaft Motor Connector Coupler" brand: "sydien" price: "AR$36280" currency: ARS in_stock: true reviews_count: 4 url: https://www.desertcart.com.ar/products/147691907-sydien-4pcs-3-17mm-to-4mm-bore-rotatable-universal-joint store_origin: AR region: Argentina --- # Sydien 4Pcs 3.17mm to 4mm Bore Rotatable Universal Joint Coupling RC Robot Boat Car Shaft Motor Connector Coupler **Brand:** sydien **Price:** AR$36280 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Sydien 4Pcs 3.17mm to 4mm Bore Rotatable Universal Joint Coupling RC Robot Boat Car Shaft Motor Connector Coupler by sydien - **How much does it cost?** AR$36280 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/147691907-sydien-4pcs-3-17mm-to-4mm-bore-rotatable-universal-joint) ## Best For - sydien enthusiasts ## Why This Product - Trusted sydien brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Main Features 👍High Quality: Made of aluminum with high hardness and toughness. It has excellent rust resistance and abrasion resistance, long service life, which is an ideal replacement for your old or broken one. 👍Flexible & Rotatable: The internal roller and cross bearing are well-made. So it can rotate 360°. 👍Perfect Performance: Allow the angle between the two axes within a limited range vary with operational needs. It has a maximum speed of 4000rpm and a sliding bearing with a maximum speed of 1000rpm. 👍Application: The metal universal joint is suitable for straight shaft motors,use for model cars, model ships, robots and other types of metal transfer. Product Specifications Product Name: Universal Joint Coupling. Material: Aluminum. Type: 3.17mm to 4mm. Dimension: -Outer Diameter: 9mm/ 0.35". -Connection Diameter: 3.17mm/ 0.12" to 4mm/ 0.16". -Length: 23mm/ 0.91". Color: Silver. Package Content: 4 Pcs x Universal Joint Coupling & 1 Pc x Wrench & 8 Pcs x Screws. If you have any problems, we are very willing to solve the problems for you.♥ ## Features - ✅Package Content: 4Pcs Universal Joint Coupling & 1 Pc x Wrench & 8 Pcs x Screws; Type: 3.17mm to 4mm. - ✅Dimension: Outer Diameter: 9mm/ 0.35"; Connection Diameter: 3.17mm/ 0.12" to 4mm/ 0.16"; Length: 23mm/ 0.91". - ✅High Quality: Made of aluminum with high hardness and toughness. It has excellent rust resistance and abrasion resistance, long service life, which is an ideal replacement for your old or broken one. - ✅Flexible & Rotatable: The internal roller and cross bearing are well-made. So it can rotate 360°. - ✅Application: The metal universal joint is suitable for straight shaft motors,use for model cars, model ships, robots and other types of metal transfer. ## Images ![Sydien 4Pcs 3.17mm to 4mm Bore Rotatable Universal Joint Coupling RC Robot Boat Car Shaft Motor Connector Coupler - Image 1](https://m.media-amazon.com/images/I/61t+VWu450L.jpg) ![Sydien 4Pcs 3.17mm to 4mm Bore Rotatable Universal Joint Coupling RC Robot Boat Car Shaft Motor Connector Coupler - Image 2](https://m.media-amazon.com/images/I/51AJFCYVbFL.jpg) ## Customer Reviews ### ⭐ Not to spec *by O***Y on Reviewed in the United States on March 11, 2021* The 3.17 mm to 4mm is not what is in the package. The actual measurements are smaller and would not fit my motor or drive shaft. Amazon sent me another package but same results. They finally gave me a refund. I was able to carefully use metric drills to bring them up to the correct I.D. I told them to check the rest of their stock. Whether they did or not I have no idea. ### ⭐⭐⭐⭐⭐ Exactly what I wanted *by E***R on Reviewed in the United States on February 11, 2021* Using it to animate the head of a robotic bird. ### ⭐⭐⭐⭐⭐ Value for money, simple and functional *by F***A on Reviewed in the United States on June 24, 2020* I would recommend, i am happy with it. --- ## 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.ar/products/147691907-sydien-4pcs-3-17mm-to-4mm-bore-rotatable-universal-joint](https://www.desertcart.com.ar/products/147691907-sydien-4pcs-3-17mm-to-4mm-bore-rotatable-universal-joint) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-14*