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ALB Materials Inc
2360 Corporate Circle. Suite 400
Henderson, NV 89074-7739
United States
E-mail: sales@albmagnets.com

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Magnets Home > Products > Neodymium Magnets > Disc > DE4 Neodymium Magnets, 7/8 inch dia. x 1/4 inch thick

DE4 Neodymium Magnets, 7/8 inch dia. x 1/4 inch thick

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Item No.:	ALB-DE4
Material:	NdFeB, Grade N42
Shape:	Disc
Dimension:	7/8" dia. x 1/4" thick (22.23mm dia. X 6.35mm thick)
Tolerances:	±0.004" x ±0.004" (±0.1mm x ±0.1mm)
Weight:	0.652 oz. (18.5 g)
Grade:	N42
Coating:	Ni-Cu-Ni (Nickel)
Pull Force(lbs):	22.87 lbs
Surface Field(Gauss):	3275 Gauss
Magnetization direction:	Axial (Poles on Flat Ends)
Max Operating Temp:	80°C
Product Drawing:	·

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Related Magnets

Other Grade DE4 Neodymium Magnets (7/8" dia. x 1/4" thick):

Grade	Item No.	Product Name	Pull Force	Inquiry
N35	ALB-DE4-N35	DE4-N35 Neodymium Magnets	16.46 lbs	Inquiry
N38	ALB-DE4-N38	DE4-N38 Neodymium Magnets	16.46 lbs	Inquiry
N40	ALB-DE4-N40	DE4-N40 Neodymium Magnets	17.85 lbs	Inquiry
N42	ALB-DE4	DE4 Neodymium Magnets	19.59 lbs	Inquiry
N45	ALB-DE4-N45	DE4-N45 Neodymium Magnets	21.10 lbs	Inquiry
N48	ALB-DE4-N48	DE4-N48 Neodymium Magnets	22.67 lbs	Inquiry
N50	ALB-DE4-N50	DE4-N50 Neodymium Magnets	23.64 lbs	Inquiry
N52	ALB-DE4-N52	DE4-N52 Neodymium Magnets	24.63 lbs	Inquiry
N42SH	ALB-DE4SH	DE4SH Neodymium Magnets	19.59 lbs	Inquiry

High Temperature DE4 Neodymium Magnets (7/8" dia. x 1/4" thick) are also available:

Neodymium Material Type	Maximum Operating Temp	Curie Temp
N (N35-N52)	176°F (80°C)	590°F (310°C)
NM (N35M-N52M)	212°F (100°C)	644°F (340°C)
NH (N33H-N52H)	248°F (120°C)	644°F (340°C)
NSH (N30SH-N50SH)	302°F (150°C)	644°F (340°C)
NUH (N28UH-N48UH)	356°F (180°C)	662°F (350°C)
NEH (N28EH-N48EH)	392°F (200°C)	662°F (350°C)
NAH (N28AH-N35AH)	428°F (220°C)	662°F (350°C)

The Thermal Characteristics listed above are values commonly associated with each magnet's grade or material. Actual performance in your application may vary with other factors, including the shape of the magnet, the Permeance Coefficient or load line, and how it is used in a circuit.

DE4 Neodymium Magnets (7/8" dia. x 1/4" thick) with other Coating are also available:

Coating Type	Overall Thickness	Salt Spray Test	Pressure Cooker Test
Ni-Cu-Ni (Nickel)	15-21 μm	24 hours	48 hours
NiCu + Black Nickel	15-21 μm	24 hours	48 hours
NiCuNi + Epoxy	20-28 μm	48 hours	72 hours
NiCuNi + Gold	16-23 μm	36 hours	72 hours
NiCuNi + Silver	16-23 μm	24 hours	48 hours
Zinc	7-15 μm	12 hours	24 hours

Each individual layer of Nickel and Copper are 5-7 μm thick. The Gold and Silver Coating layers are 1-2 μm thick. Test results shown to allow comparison between Coating options. Performance in your application under your specific test conditions may vary. Salt Spray testing conducted with a 5% NaCl solution, at 35°C. Pressure Cooker Test (PCT) conducted at 2 atm, 120°C at 100% RH.

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