Cast Alnico Permanent Magnet
17Pages

Cast ALNICO Permanent Magnets

ALNICO PERMANENT MAGNETS Introduction For over 50 years an acknowledged leader in the field of permanent magnets, Arnold Engineering continues its tradition of superior quality and value with the full line of Alnico products presented in this catalog. One of the oldest members of our magnet family, Alnico remains the workhorse of the permanent magnet industry and can be relied upon to deliver impressive flux density at an economical price. Alnico also boasts the lowest temperature coefficient of any commercial magnet material (.02% per degree centigrade) allowing for excellent stability...

Max. Energy Residual Required Coersive Recoil B/H @ Maximum Product Bd x Hd Induction Br Magnetizing Field Force Hc Permeability (BdHd) Max. Energy Product Typical Demagnetization Curves 03 Demagnetizing Field ARNOLD MAGNETIC TECHNOLOGIES

Electrical Resistivity Tensile Strength Transverse Modulus of Rupture Coefficient of Thermal Expansion Temperature Effects Alnico 3 ARNOLD MAGNETIC TECHNOLOGIES

Magnetic and Physical Properties (Typical Values) Permeance Coefficient Induction at Max. Energy Residual Required Coersive Recoil B/H @ Maximum Product Bd x Hd Induction Br Magnetizing Field Force Hc Permeability (BdHd) Max. Energy Product Alnico 5 Alnico 5cc Alnico 6 Typical Demagnetization Curves ARNOLD MAGNETIC TECHNOLOGIES

Alnico 5, 5cc, 6 & ArKomax® 800, 800 Hi-Hc Magnetic and Physical Properties (Typical Values) Electrical Resistivity Transverse Modulus of Rupture Tensile Strength Coefficient of Thermal Expansion Temperature Effects Alnico 5 % Reversible Irreversible Reversible Irreversible Reversible Irreversible

Magnetic and Physical Properties (Typical Values) Permeance Coefficient Induction at Max. Energy Residual Required Coersive Recoil B/H @ Maximum Product Bd x Hd Induction Br Magnetizing Field Force Hc Permeability (BdHd) Max. Energy Product Alnico 8B Alnico 8HE Alnico 8H Alnico 9 Typical Demagnetization Curves ARNOLD MAGNETIC TECHNOLOGIES

Alnico 8B, 8HE, 8H, 9 Magnetic and Physical Properties (Typical Values) Electrical Resistivity Transverse Modulus of Rupture Coefficient of Thermal Expansion Tensile Strength Temperature Effects Alnico 8HE Reversible Irreversible Reversible Irreversible Reversible Irreversible

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Horseshoe Magnets Curved-Field Magnets ARNOLD MAGNETIC TECHNOLOGIES

The holding force values listed are typical under ideal conditions; i.e. ground pole faces in direct contact with a smooth steel surface. Separator Magnets DIMENSIONS HOLDING ARNOLD MAGNETIC TECHNOLOGIES

Channel Bars The lengths listed for bar magnets are maximum as cast lengths. Shorter lengths may be cut and ground to size. The holding force values listed are typical under ideal conditions; i.e. ground pole faces in direct contact with a smooth steel surface. ARNOLD MAGNETIC TECHNOLOGIES

The high coercive force and relatively high energy product of Alnico 8 offer distinct advantages over other permanent magnet materials in applications where a magnet must withstand strong demagnetizing fields and the space factor is limited. CAT. NO. 8B472 8B473 8B474 8B475 ARNOLD MAGNETIC TECHNOLOGIES

Standard Alnico Tolerances Cast Alnico Dimension Up to 1" Up to 25.4 mm Sintered Alnico Dimension Up to .125" Up to 3.18 mm .126" to .625" 3.20 to 15.88 mm Concentricity Concentricity between inside and outside as cast diameters: .031" (.79 mm) F.I.R. when hole diameter is greater than hole length. 1.5 X total O.D. tolerance F.I.R. when hole diameter is less than hole length. Squareness Perpendicularity between one ground surface and an "as cast" surface is ±1-1/2 degrees. Finish Permanent magnet materials can be finish ground when dimensional tolerances closer than the initial...

Please refer to Alnico Product Specification Sheets when ordering standard Alnico permanent magnets. The magnets listed on these specification sheets, however, represent only a small percentage of the wide variety of shapes and sizes available in the various grades of Alnico. We invite your inquiries concerning magnet designs other than those listed. These inquiries should be submitted to Arnold Engineering, Marengo, Illinois, or to the nearest Arnold sales office. It is our desire to respond to your inquiries rapidly and accurately. In order to do this, your requests should contain certain...

For 24-hour turn-around on quotations: MAIL TO: FAX TO: THE ARNOLD ENGINEERING COMPANY Alnico Products Division 300 North West Street Marengo, IL 60152 Address: Reply Requested By: WFax ■Phone Phone No.: Fax No.: Arnold Part No.: Application and General Information:_ Direction of Orientation: Delivery Requested: Quantity/Estimated Annual Usage: Print or sketch — Please include description: all dimensions and tolerances; material; magnetic requirements and material grade required; type of coating and color. ARNOLD MAGNETIC TECHNOLOGIES

770 Linden Ave. • Rochester, NY 14625-2764 USA Tel: 800-593-9127 • (+1) 585-385-9010 • Fax: (+1) 585-385-5625 Email: info@arnoldmagnetics.com ©2003 Arnold Magnetic Technolo