Sintered ALNICO Permanent Magnets
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Sintered 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 Product Bd x Hd Induction Br Magnetizing Field Force Hc Recoil Permeability Permeance Coefficient B/H @ (BdHd) Max. Induction at Maximum Energy Product Sint. Alnico 2 Sint. Alnico 5 Sint. Alnico 6 Typical Demagnetization Curves O O o Q. -H (oersteds) Demagnetizing Field ARNOLD MAGNETIC TECHNOLOGIES

Magnetic and Physical Properties (Typical Values) Density Electrical Resistivity Tensile Strength Transverse Modulus of Rupture Coefficient of Thermal Expansion Temperature Effects Sint. Alnico 2 ARNOLD MAGNETIC TECHNOLOGIES

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

Electrical Resistivity Tensile Strength Transverse Modulus of Rupture Coefficient of Thermal Expansion Unoriented Sint. Alnico 8 0.252 6.98 Temperature EffectsSint. Alnico 8B Sint. Alnico 8H % Bd Unoriented Sint. Alnico 8 Reversible - ARNOLD MAGNETIC TECHNOLOGIES

* These parts are furnished in Sintered Alnico 5 and are oriented parallel to the C dimension. ARNOLDMAGNETIC TECHNOLOGIES

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...

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

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