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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 > DD4 Neodymium Magnets, 13/16 inch dia. x 1/4 inch thick

DD4 Neodymium Magnets, 13/16 inch dia. x 1/4 inch thick

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Item No.:	ALB-DD4
Material:	NdFeB, Grade N42
Shape:	Disc
Dimension:	13/16" dia. x 1/4" thick (20.64mm dia. X 6.35mm thick)
Tolerances:	±0.004" x ±0.004" (±0.1mm x ±0.1mm)
Weight:	0.562 oz. (15.9 g)
Grade:	N42
Coating:	Ni-Cu-Ni (Nickel)
Pull Force(lbs):	20.86 lbs
Surface Field(Gauss):	3457 Gauss
Magnetization direction:	Axial (Poles on Flat Ends)
Max Operating Temp:	80°C
Product Drawing:	·

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Related Magnets

Other Grade DD4 Neodymium Magnets (13/16" dia. x 1/4" thick):

Grade	Item No.	Product Name	Pull Force	Inquiry
N35	ALB-DD4-N35	DD4-N35 Neodymium Magnets	15.29 lbs	Inquiry
N38	ALB-DD4-N38	DD4-N38 Neodymium Magnets	15.29 lbs	Inquiry
N40	ALB-DD4-N40	DD4-N40 Neodymium Magnets	16.58 lbs	Inquiry
N42	ALB-DD4	DD4 Neodymium Magnets	18.19 lbs	Inquiry
N45	ALB-DD4-N45	DD4-N45 Neodymium Magnets	19.60 lbs	Inquiry
N48	ALB-DD4-N48	DD4-N48 Neodymium Magnets	21.05 lbs	Inquiry
N50	ALB-DD4-N50	DD4-N50 Neodymium Magnets	21.95 lbs	Inquiry
N52	ALB-DD4-N52	DD4-N52 Neodymium Magnets	22.87 lbs	Inquiry
N42SH	ALB-DD4SH	DD4SH Neodymium Magnets	18.19 lbs	Inquiry

High Temperature DD4 Neodymium Magnets (13/16" 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.

DD4 Neodymium Magnets (13/16" 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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