--- product_id: 98693570 title: "Samarium Cobalt Magnet for Motors, Electric Motors, Turbo Machinery and Sensors - 20mm dia x 3mm thick - 3kg Pull - Pack of 4" brand: "first4magnets" price: "$44.77" currency: USD in_stock: true reviews_count: 7 category: "First4 Magnets" url: https://www.desertcart.us/products/98693570-samarium-cobalt-magnet-for-motors-electric-motors-turbo-machinery-sensors store_origin: US region: United States of America --- # 300°C max operating temp 3kg pull force per magnet Superior corrosion resistance Samarium Cobalt Magnet for Motors, Electric Motors, Turbo Machinery and Sensors - 20mm dia x 3mm thick - 3kg Pull - Pack of 4 **Brand:** first4magnets **Price:** $44.77 **Availability:** ✅ In Stock ## Summary > 🧲 Power your projects with magnets that don’t quit—strong, stable, and sizzling hot! ## Quick Answers - **What is this?** Samarium Cobalt Magnet for Motors, Electric Motors, Turbo Machinery and Sensors - 20mm dia x 3mm thick - 3kg Pull - Pack of 4 by first4magnets - **How much does it cost?** $44.77 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/98693570-samarium-cobalt-magnet-for-motors-electric-motors-turbo-machinery-sensors) ## Best For - first4magnets enthusiasts ## Why This Product - Trusted first4magnets brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Crafted Discs:** 20mm diameter x 3mm thick with tight ±0.1mm tolerance for seamless integration. - • **Engineered for Endurance:** Samarium Cobalt’s rare earth composition ensures long-term stability and demagnetization resistance. - • **Heat-Resistant Powerhouse:** Operates flawlessly up to 300°C—built for extreme environments. - • **Unmatched Magnetic Strength:** Each magnet supports up to 3kg, delivering reliable hold in compact form. - • **Versatile Industrial Utility:** Perfect for electric motors, turbo machinery, sensors, and outdoor applications. ## Overview This pack of four 20mm diameter by 3mm thick Samarium Cobalt magnets offers a robust 3kg pull force each, engineered to withstand temperatures up to 300°C. Ideal for high-performance applications like electric motors, turbo machinery, and sensors, these corrosion-resistant rare earth magnets combine precision manufacturing with exceptional durability, making them a must-have for professionals demanding reliability in extreme conditions. ## Description From the manufacturer Samarium Cobalt is manufactured using vacuum powder sintering technology and is sintered using special tooling techniques into standard disc, ring and block shapes. These magnets can then be sliced into smaller magnets or ground to tighter tolerances. While not quite as strong as Neodymium, Samarium Cobalt is still a high-performance rare earth material. It offers incredible strength per unit volume even at high temperature and is used in high-power applications where long-term reliability is critical. Disc magnets are incredibly versatile and have great strength for their size. They can be fixed in place using adhesive or pushed into drilled holes in wood and plastic. Review: One Star - I was sent an empty plastic box. Review: Strong magnets that can be used in hot environment. - Strong magnet. I used them to hold down the oven liner in our fan oven. Some types of magnet do not like to be heated. These are fine. Bought 2 packs... our fan is pretty strong. They work well. ## Features - HIGH MAXIMUM OPERATING TEMPERATURE. Samarium cobalt has a maximum operating temperature of 300 degrees Celsius these magnets are perfect for high-temperature applications. - MULTIPLE USES. Because of their high maximum operating temperature, they are commonly used in applications such as motors and electric motors, turbo machinery, and sensors. - IDEAL FOR OUTDOOR USE. Samarium cobalt has a superior resistance to corrosion and demagnetisation they are ideal for use outside. - STRONG RARE EARTH MAGNET. Each magnet can support a steel weight of up to 3kg vertically from the magnetic face when in flush contact with a mild steel surface. - SPECIFICATIONS. 20mm diameter x 3mm thick. +/-0.1mm tolerance. Each magnet's north and south pole are on opposite 20mm diameter faces. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TACK20M | | Best Sellers Rank | 130,666 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 940 in Rare Earth Magnets | | Brand | FIRST4MAGNETS | | Colour | Silver | | Country Of Origin | China | | Customer Reviews | 3.4 out of 5 stars 14 Reviews | | Global Trade Identification Number | 05055641228578 | | Item Shape | Round | | Item Type Name | 20mm dia x 3mm thick Samarium Cobalt Magnet - 3kg Pull ( Pack of 4 ) | | Item Weight | 0.1 Kilograms | | Manufacturer | Magnet Expert® | | Manufacturer Part Number | F406SC-4 | | Material | Copper | | Material Type | Copper | | Model Number | F406SC-4 | | Number of Pieces | 4 | | Number of pieces | 4 | | Pull Force | 3 Kilograms | | Pull force | 3 Kilograms | | Shape | Round | | Unit Count | 4.0 count | ## Images ![Samarium Cobalt Magnet for Motors, Electric Motors, Turbo Machinery and Sensors - 20mm dia x 3mm thick - 3kg Pull - Pack of 4 - Image 1](https://m.media-amazon.com/images/I/516slDDIHnL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐ One Star *by M***X on 1 June 2017* I was sent an empty plastic box. ### ⭐⭐⭐⭐⭐ Strong magnets that can be used in hot environment. *by J***. on 30 December 2016* Strong magnet. I used them to hold down the oven liner in our fan oven. Some types of magnet do not like to be heated. These are fine. Bought 2 packs... our fan is pretty strong. They work well. ### ⭐⭐⭐ magnets *by M***D on 30 January 2022* Received round and rectangle magnets, and the circle ones were half strength so they had to double up. Not what I expected. --- ## 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/98693570-samarium-cobalt-magnet-for-motors-electric-motors-turbo-machinery-sensors](https://www.desertcart.us/products/98693570-samarium-cobalt-magnet-for-motors-electric-motors-turbo-machinery-sensors) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-21*