Technical Specifications

Detailed engineering specifications for professional-grade diving magnets

Specification Table

Spec	DM115-CS/P	DM140-CS/P	DM160-CS/P	DM200-CS/P	DM250-CS/P
D (mm)	60	60	78	78	78
D1 (mm)	8.5	8.5	10.5	10.5	10.5
D2 (mm)	16.5	16.5	20.5	20.5	20.5
Height (mm)	21	21	18	18	18
Weight (g)	388	388	475	475	590
Material	NdFeB	NdFeB	NdFeB	NdFeB	NdFeB
Grade	N45	N48	N45	N48	N48
Magnetic Face (mm)	60	60	78	78	78
Attraction (kg)	115	140	160	200	250
Slide Resistance (N)	23	28	32	40	50
Fixing	8mm c/s screw	8mm c/s screw	10mm c/s screw	10mm c/s screw	10mm c/s screw

Note: All specifications are subject to standard tolerances. For detailed dimensional drawings and technical consultation, please contact our sales team. Performance characteristics may vary based on application conditions and surface preparation.

Material Specifications

Neodymium Magnet

Grade: N45-N48 High Performance
Shape: Pot design with counter-bored hole
Composition: NdFeB (Neodymium-Iron-Boron)
Coating: Epoxy-HDPE
Max Operating Temperature: 80°C
Magnetization Direction: Axial (through thickness)

Steel Housing

Material: AISI A3
Corrosion Resistance: Excellent in saltwater
Surface Finish: Brushed/Polished
Housing Thickness: 2mm minimum

Eyebolt and Handle

Material: 316 Stainless Steel
Thread Type: Metric, Right-hand
Minimum Breaking Load: 5x magnet pull force

Application

Professional-grade diving magnets with counter-bored hole design for secure fastening

Understanding Pull Force

Factors Affecting Performance

Surface Condition: Rust, paint, or marine growth reduces pull force by 20-50%
Material Thickness: Thin metal (under 5mm) reduces effective pull force
Air Gaps: Even 0.5mm gap can reduce force by 50% or more
Temperature: Higher temperatures reduce magnetic strength
Pull Angle: Side pulling can reduce effective force by 70%+

Real-World Considerations

Safety Factor: Use 2-3x rated capacity for dynamic loads
Underwater: Current and wave action create additional forces
Curved Surfaces: Reduce contact area and thus pull force
Non-Ferrous Metals: Aluminum, brass, copper are non-magnetic
Stainless Steel: Some grades (304, 316) have weak magnetic properties