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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

DD4 Neodymium Magnets, 13/16 inch dia. x 1/4 inch thick Inquiry
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: PDF drawing of ALB-DD4 · JPEG drawing of ALB-DD4

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Next: DD8 Neodymium Magnets, 13/16 inch dia. x 1/2 inch thick

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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