Description
Product Overview
The Master Magnetics Cast Alnico 5 cow magnet is engineered for the demanding environment of dairy and beef operations where animal health and feed efficiency are paramount. Constructed from a high‑grade cast Alnico alloy—a blend of aluminum, nickel, and cobalt—the magnet offers a stable magnetic field that does not degrade over the lifespan of a herd. Measuring three inches in length, half an inch in diameter, and weighing just over five ounces, the cylindrical shape is optimized for insertion using a conventional balling gun, allowing veterinarians and farm workers to place the magnet quickly and safely. The magnet’s poles are strategically aligned to draw metallic contaminants toward the center, minimizing the risk of sharp protrusions that could injure the animal’s digestive tract. Each package includes two identical magnets, providing redundancy for larger herds or for use as a spare in case of loss or damage. The product is certified by the manufacturer as non‑discontinued, ensuring ongoing support and availability.
![[Product front view showing all components]](https://www.plazafinds.store/wp-content/uploads/2026/08/2434ed53fc2343f7bd4d6659d8dbdbdf.jpg)
Usage
In typical dairy operations, cows often graze on pastures where stray nails, staples, and other pieces of metal—collectively known as tramp iron—can become embedded in the feed or ground. When ingested, these objects can cause internal injuries, reduce appetite, and lead to costly veterinary interventions. The Alnico cow magnet is placed in the rumen of each animal, where its magnetic force captures and holds these metallic particles, preventing them from moving further through the digestive system. The magnet is especially valuable during the first months after a calf is weaned, a period when animals are most likely to encounter foreign metal while exploring new grazing areas. Beyond livestock, the magnet serves as an educational tool in classroom settings, allowing students to visualize magnetic fields and understand the principles of ferromagnetism through hands‑on experiments. Its robust construction also makes it suitable for use in small‑scale wildlife rehabilitation where similar hazards may be present.
Why Choose Us
Master Magnetics has been a trusted name in industrial and agricultural magnet solutions since 1976, building a reputation for reliability, performance, and customer‑focused service. The company’s commitment to quality begins with rigorous material testing; each cast Alnico magnet undergoes magnetic strength verification and corrosion resistance assessment before it leaves the factory. This ensures that the magnet will retain its pull strength even in the moist, acidic environment of a cow’s rumen. Additionally, Master Magnetics provides responsive technical support, offering guidance on proper magnet placement, troubleshooting, and replacement schedules. The company’s U.S.‑based manufacturing facilities allow for rapid fulfillment and easy access to spare parts, reducing downtime for farms that rely on continuous herd health monitoring. By choosing a Master Magnetics product, customers benefit from a proven track record, transparent warranty policies, and a dedication to continuous improvement driven by feedback from veterinarians and agricultural professionals.
Key Features
- Durable cast Alnico 5 alloy provides a long‑lasting magnetic pull that endures the full lifespan of a herd.
- Three‑inch cylindrical design fits standard balling guns, enabling quick and safe insertion without animal stress.
- Poles are engineered to draw metal particles toward the center, reducing the chance of sharp edges causing internal injury.
- Includes two magnets per package, offering redundancy for larger operations or as a backup for lost units.
- Backed by Master Magnetics’ U.S. customer support team, providing installation advice and warranty assistance.
FAQ
How does the magnet prevent health issues in cattle?
The magnet captures metallic debris such as nails, staples, and wire fragments that cattle may ingest while grazing. By attracting these items to its surface, the magnet prevents them from traveling further into the digestive tract where they could cause perforations, blockages, or reduced feed intake, thereby safeguarding animal health and productivity.
Can the magnet be used in other livestock species?
Yes, the magnet’s size and magnetic strength make it suitable for use in other ruminants such as sheep and goats. However, it is essential to follow species‑specific placement guidelines and consult a veterinarian to ensure proper dosing and insertion technique.
What is the recommended replacement interval?
Because the cast Alnico alloy resists corrosion and maintains its magnetic field, most producers find that a single magnet can remain effective for the entire productive life of the animal, often exceeding ten years. Replacement is typically only necessary if the magnet is physically damaged or if a veterinarian advises removal for a specific medical condition.
Is the magnet safe for use with feed additives or medications?
The magnet’s material is chemically inert and does not react with common feed additives, vitamins, or oral medications. It can safely coexist with these products in the rumen without affecting their efficacy or the magnet’s performance.
How should the magnet be stored before use?
Store the magnets in a dry, non‑magnetic container away from strong electromagnetic fields. Keeping them in their original packaging until the time of insertion helps preserve their magnetic strength and prevents accidental damage.

![Magnet Expert 11 x 6 x 75mm Educational Alnico Bar Magnets [0.43 x 0.24 x 2.95"], North & South Identified, 2pcs-0](https://www.plazafinds.store/wp-content/uploads/2026/07/644c2411f9284f73afe3b5b4e5913f6d-300x300.jpg)



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