Alnico Magnets

AlNiCo,  Alnico Magnets, Casting & Sintered AlNiCo Permanent Magnets

Alnico was developed in the early 1930’s. During World War II it was used in military electronic applications. After the war it quickly spread into civilian versions of those applications and replaced magnet steel in many applications. High induction levels with good resistance to demagnetization and stability, due to its low temperature coefficient (0.02% / °C), at a reasonable cost made Alnico the magnet material of choice.

Alnico-Magnets

Alnico-Magnets

A high working temperature limit (550 °C / 1020 °F) makes Alnico especially well suited for sensitive automotive and aircraft sensor applications. Alnico is produced in many grades to fit the requirements of these applications, from Alnico 1 to Alnico 12, but the most popular grades are 2, 5 and 8. By comparison to newer materials, the coercivity of Alnico is low.

Where Alnico is appropriate, magnet size can be minimized if it can be magnetized after assembly into the magnetic circuit. If used independent of other circuit components, as in security applications, the effective length to diameter ratio (related to the permeance coefficient) must be great enough to cause the magnet to work above the knee in its second quadrant demagnetization curve. For critical applications, Alnico magnets may be calibrated to an established reference flux density value. A by-product of low coercivity is sensitivity to demagnetizing effects due to external magnetic fields, shock, and application temperatures. For critical applications, Alnico magnets can be temperature stabilized to minimize these effects.

Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. Some grades also contain copper and/or titanium. The alloying process is casting or sintering. The process and the heat treatment needed to optimize magnetic properties produces hard (Rc45) and brittle parts that are best shaped or finished by abrasive grinding. Cast parts are generally under 70 pounds and may be used as-is, but polar surfaces are usually ground flat and parallel. Sintering is confined to high volume parts in sizes under one cubic inch and an effective press length to diameter ratio under four.

Alnico-Gussmagnet

Alnico-Gussmagnet

To minimize the volume of magnet material required by an application, the entire magnetic circuit must be considered. An optimized circuit design results in a circuit permeance coefficient that causes the magnet to operate above the knee of its demagnetization curve by a margin large enough to offset anticipated operating demagnetizing effects. Optimized steel components result in an effective magnetic length greater than the magnet itself, but this is only effective if the magnet can be magnetized after assembly into the circuit. The alternate is to design the magnet shape to produce a load line, on its own, that intersects the BH curve above its knee, so minimal flux is lost due to the self demagnetizing factor upon removal from the magnetizing fixture. In either case, a magnetizing force of 3.0 kOe must be applied to Alnico 5 magnets and 7.0 kOe for Alnico 8. When magnetized in a magnetic circuit, the magnetizing pulse must be wide enough to allow eddy currents in the steel to decay before dropping below these values.

Customer Rough Cast Alnico Bar Magnets for Humbucker and Pickup

Customer Rough Cast or Vingate PAF Alnico Bar Magnets

Customer Rough Cast or Vingate PAF Alnico Bar Magnets for Humbucker and Pickup, Customized Unpolished AlNiCo Rough Cast Humbucker Bar Magnet, Vingate Authentic Sand Cast AlNiCo Bar Magnet, Vingate PAF Style Bar Magnet HS-GPBA2 —- HS-GPBA8 with rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 2/ Alnico 3/ Alnico 4 / Alnico 5 /Alnico 8 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.18″ […]

Unpolished Rough Sand Cast Alnico 8 Bar Humbucker Magnets

Unpolished Rough Sand Cast Alnico 8 Bar Humbucker Magnets

Unpolished Rough Sand Cast Alnico 8 Bar Humbucker Magnets, Vingate PAF Rough Pickup Narrow Alnico 8 Bar Magnets, Oversized Unpolished Rough Cast Alnico 8 Bar Magnets for Guitar Pickups HS-GPBA8 with vintage rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 8 / Alnico VIII/ A8 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.18″ Length x 0.5″ Width […]

Wholesale Bulk Guitar Pickup AlNiCo 8 Bar Magnets

Wholesale Bulk Guitar Pickup AlNiCo 8 Bar Magnets

Wholesale Bulk Guitar Pickup AlNiCo 8 Bar Magnets, Polished Fully Magnetized AlNiCo 8 Bar Humbucker Magnets, Alnico 8 Rectangular Bar Guitar Magnet For Mini Humbucker and P90 Pickups HS-GPBA8 with polished Fueature: * Permanent Magnet Merial: AlNiCo 8 / Alnico VIII / A8 (Al8) * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or  2.18″ Length x 0.5″ Width x 0.125″ […]

Alnico 5 Bar Rough Unoriented Humbucker Magnet

Unoriented Alnico 5 Rough Surface Bar Magnets

Unoriented Alnico 5 Rough Surface Bar Magnets,  Unpolish Alnico 5 Un-oriented Bar Magnet, AlNiCo V A5 Humbucker PAF Style Bar Magnet, Unoriented Mangetized Rough Sand Cast AlNiCo Bar Magnet HS-GPBA5 with rough unoriented Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V / A5 * Size: 2.444″ Length x 0.492″ Width x 0.125″ Height * Polished: Unpolished – Rough Cast unoriented * […]

Vintage Rough Pickups Alnico 5 Bar Magnets Unpolished

Vintage Rough Pickups Alnico 5 Bar Magnets Unpolished, Rough Cast Alnico 5 Bar Magnets for Guitar Pickups, Alnico V Rough Bar Magnet for Humbucker and P90s, Unpolished Rough Sand Cast Alnico 5 Magnets, Vingate PAF Magnets HS-GPBA5 with vintage rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V/ A5 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.18″ Length […]

Alnico V A5 Bar Magnet for Humbucker or P90 Guitar Pickups

Alnico V A5 Bar Magnets for Humbucker or P90 Guitar Pickups

Alnico V A5 Bar Magnet for Humbucker or P90 Guitar Pickups, Polished Alnico 5 Pickup Humbucker Bar Magnet, Polished Alnico V Block Magnets, Humbucking Pickup Alnico 5 Polished Bar Magnet HS-GPBA5 with polished Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V/ A5 (Al5) * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height o  2.18″ Length x 0.5″ Width x 0.125″ Height or 2.444″ Length x […]

Unpolished AlNiCo 4 Rough Cast Humbucker Bar Magnet

Unpolished AlNiCo 4 Rough Cast Humbucker Bar Magnet

Unpolished AlNiCo 4 Rough Cast Humbucker Bar Magnet, Unpolished Humbucker AlNiCo 4 Bar Magnet for P90s and PAF, Vingate Authentic Sand Cast AlNiCo Bar Magnet, Vingate PAF Style Bar Magnet HS-GPBA4 with vintage rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 4 / Alnico IV/ A4 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.444″ Length x 0.492″ Width x […]

Alnico 4 Rectangular Bar Guitar Humbucker Magnets

Alnico 4 Rectangular Bar Guitar Humbucker Magnets

Alnico 4 Rectangular Bar Guitar Humbucker Magnets, Alnico 4 Polished Bar Magnet, Alnico IV Guitar Pickup Magnet, Alnico 4 Cast Bar Magnets for Humbucker/P90 HS-GPBA4 with polished Fueature: * Permanent Magnet Merial: AlNiCo 4 / Alnico IV/ A4 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.444″ Length x 0.492″ Width x 0.125″ Height * Polished: Yes * For humbucker […]

ALNICO 3 Unpolished Cast Bar Magnet Vintage Rough Style

ALNICO 3 Unpolished Cast Bar Magnet Vintage Rough Style

ALNICO 3 Unpolished Cast Bar Magnet Vintage Rough Style, Alnico 3 Pickup Humbucker Bar Magnet, Rough Cast Alnico III Rectangular Block Bar Guitar Magnets HS-GPBA3 with vintage rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 3 / Alnico III / A3 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.444″ Length x 0.492″ Width x 0.125″ Height […]

Alnico 3 Bar Humbucker Magnet Polished

Alnico 3 Bar Humbucker Magnet Polished

Alnico 3 Cast Bar Humbucker Magnet Polished,  Alnico III Bar Permanent Magnet for Humbucker and P90 Guitar Pickups, Pickup Pickup Parts & Kits Alnico 3 Bar Magnets, Alnico Block HS-GPBA3 with polished Fueature: * Permanent Magnet Merial: AlNiCo 3 / Alnico III / A3 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.444″ Length x 0.492″ Width x […]

Alnico 2 Rough Pickup Bar Magnet for Humbucker and P90 Pickups

Alnico 2 Rough Cast Unplished Bar Magnet for Humbucker and P90 Guitar Pickups, Standard Rough Cast Alnico II Rectangular Bar Guitar Magnet, Alnico 2 Humbucker Magnet – Vintage Rough Cut Style HS-GPBA2 with vintage rough unpolished Fueature: * Permanent Magnet Merial: AlNiCo 2 / Alnico II / A2 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height […]

ALNICO 2 Polished Bar Magnet for Guitar Pickup

ALNICO 2 Polished Bar Magnet for Guitar Pickup

ALNICO 2 Polished Bar Magnet for Guitar Pickup, Alnico II Rectangular Bar Guitar Magnet, Pickup Humbucker Bar Magnet, Misc Hardware Alnico 2 Humbucker Bar Magnet Magnetized or N0n-magnetized HS-GPBA2 with polished Fueature: * Permanent Magnet Merial: AlNiCo 2 / Alnico II / A2 * Size: 2.5″ Length x 0.5″ Width x 0.125″ Height or 2.18″ Length x 0.5″ Width x 0.125″ Height or 2.444″ […]

Guitar Pickup Separate Magnets Alnico Rods

Guitar Pickup Separate Magnets Alnico Rods

Guitar Pickup Separate Magnets Alnico Rods, Alnico 2,3,5,8 Polepieces Vintage Staggered Set Rod Magnets for Pickup Bobbin, Alnico Separate Cylindrical Magnets, Pickup Separate Round Bar Magnets * Magnet Merial: Alnico 2,3,4,5,8 / Alnico I, II, III, IV,  V, VIII/ A2, A3, A4, A5, A8 * Top Characteristic: Flat Top, Vintage Top, Modern Top(Chamfer) * Diameter: 0.187 in / 0.195 in / 0.250in * Length: 0.471 in 0.630 […]

Alnico 8 Polepiece Rods Vintage Staggered Set

ALNICO 8 Rod Pickup Separate Magnets Vintage Stagger Set

ALNICO 8 Rod Pickup Separate Magnets Vintage Stagger Set, Rough / Sand Cast Alnico A8 Flush Pole Mounted Polepiece Magnets, Guitar Pickup Bobbin Alnico VIII Polepiece Rods Vintage Staggered Set * Magnet Merial: Alnico 8 / Alnico VIII / A8 / Al 8 * Top Characteristic: Flat Top, Vintage Top, Modern Top(Chamfer) * Diameter: 0.187 in / 0.195 in * Length: 0.471 […]

Alnico 2 Flush Pole Mounted Polepiece Magnets for Guitar Pickup

Rough / Sand Cast Alnico 2 Flush Pole Mounted Polepiece Magnets for Guitar Pickup Bobbin, Guitar Pickup Bobbin Rough Alnico II Polepiece Rods Vintage Staggered Set, Alnico 2 Pickup Rod Separate Magnets Based on the Vintage Stagger * Magnet Merial: Alnico 2 / Alnico II / A2 * Top Characteristic: Flat Top, Vintage Top, Modern Top(Chamfer) * Diameter: 0.187 in / 0.195 in […]

Guitar Pickup Bobbin Alnico 3 Polepieces Vintage Staggered Set

Guitar Pickup Bobbin Alnico 3 Polepieces Vintage Style Top

Guitar Pickup Bobbin Alnico 3 Polepieces Vintage Style Top, Sand Cast Alnico 3 Flush Pole Mounted Polepiece Magnets for Guitar Pickup Bobbin, Alnico 3 Pickup Rod Magnets Based on the Vintage Stagger, Cast Alnico Cylinder Guitar Pickup Magnets * Magnet Merial: Alnico 3 / Alnico III / A3 * Top Characteristic: Flat Top, Vintage Top, Modern Top(Chamfer) * Diameter: 0.187 in […]

Alnico 5 Polepieces Vintage Staggered Set for Pickup Bobbin

Alnico 5 Polepieces Vintage Top for Pickup Bobbin

Alnico 5 Polepieces Vintage Top Style Rod Magnets for Pickup Bobbin, Alnico 5 (A5) Polepiece Guitar Rod Cylindrical Magnets, Vintage Staggered Set Alnico V Permanent Magnet in Neck Pickup Bobbin, Bridge Pickup Bobbin Cast Alnico 5 guitar rod magnets similar to the ones found in vintage pickups from the ’50s. includes 6 pieces as specified below. * Magnet Merial: Alnico 5 / Alnico V […]

Vintage Beveled Chamfered Pickups Alnico 5 Cylindrical Magnet (0.250Diameter)

Vintage Top Chamfered Pickups Alnico 5 Cylindrical Magnet (0.250″Diameter)

Vintage Top Beveled Pickups Alnico 5 Cylindrical Magnet (0.250″Diameter), Chamfered Alnico 5 Polepiece Rod Magnet FOR Telecaster or Stratocaster Type Guitar Pickup Assembly, 0.250″Diameter Vintage Beveled Guitar & Bass Pickups Alnico 5 Cylinder Magnet HS-GPAR-5 with vintage beveled top / chamfered Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V / A5 * Diameter: 0.250 in * Length: 0.471 in 0.630 in 0.650 in 0.665 in. 0.671 in 0.688 […]

Cast Modern Bevel Alnico V Guitar Rod Magnets Chamfered

Cast Modern Top Style Alnico V Guitar Rod Magnets Chamfered

Cast Modern Top Style Alnico 5 Polepiece Guitar Rod Magnets Chamfered, Alnico V Rod Guitar Magnets, Cast AlNiCo 5 Guitar Pickup Rod Magnets Modern Beveled Top, Polished / Unpolished Vintage Staggered Bass Pickups Alnico 5 Cylindrical Bar Magnet HS-GPAR-5 with modern beveled top / chamfered Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V / A5 * Diameter: 0.187 in / 0.195 in […]

ALNICO 5 Rod Cylinder Magnets Vintage Bevel

ALNICO 5 Rod Cylinder Magnets Vintage Top Style

ALNICO 5 Rod Cylinder Magnets Vintage Top Style, Alnico V Guitar Magnets, Guitar Pickup Magnets (Imperial) – Polished, ALNICO 5 Rod Bluk Vintage Stagger Magnets ( 0.187″, 0.195″, 0.250″) HS-GPAR-5 with vintage beveled top Fueature: * Permanent Magnet Merial: AlNiCo 5 / Alnico V / A5 * Diameter: 0.187 in / 0.195 in / 0.250 in * Length: 0.471 in 0.630 in […]