Injection Molded Bonded Samarium Cobalt Magnets, Bonded SmCo

Injection Molded Samarium Cobalt Bonded Magnets can be made by combining SmCo powders with Nylon 6, Nylon 12, PPS and other resins. The ratios between magnetic powders and resins are endless, therefore many grades exist depending on magnetic performance, temperature resistance, and mechanical strength. These materials can be molded directly over or into another polymer or metal component. The shapes and sizes are endless, as are the magnetization patterns that can be achieved either in the molding tool or by utilizing a magnetizing fixture. The following tables list several common grades, however we have the capability to formulate any desired grade of magnetic material based on customer specified parameters.

Injection Molded Bonded Samarium Cobalt Magnets

Injection Molded Bonded Samarium Cobalt Magnets

Bonded Samarium Cobalt is the highest grade of material that can either be made by using nylon 12 or compression molded using epoxy. It was developed by Seiko Epson Corporation and can be made radial up to 15 Mgoe, cross field up to 17 Mgoe, and axially by similar method for 15 Mgoe. Typically used in high quality stepping motors, this material has been in the market place for over 30 years and HSMAG has yet to have a reject of any kind.

Injection Molded Bonded Samarium Cobalt Magnets Magnetic Properties & Grade

Magnetic
Properties		 Remanence Coercive
Force		 Intrinsic
Coercivity		 Energy
Product
Br Hc Hci (BH)max
kGs mT kOe kA/m kOe kA/m MGOe kJ/m
BIS-3 3.0-4.0 300-400 2.5-3.5 200-280 8-15 640-1200 2.5-3.5 20-28
BIS-6 5.2-5.8 520-580 3.8-4.8 300-380 8-15 640-1200 5.5-6.5 44-52
BIS-8 6.0-6.6 600-660 4.5-5.8 360-460 8-15 640-1200 7.5-8.5 60-68
BIS-9 6.1-6.8 610-680 5.0-6.0 400-480 8-15 640-1200 8.5-9.5 68-76
Temperature
Properties		 Reversible Temp Coef. Max Working Temperature Mold Temperature Range
%/°C Tmax °C Tmold °C
 Bd  Hd PA6 PA12 PPS PA6 PA12 PPS
BIS-3 -0.035 -0.29 150 120 180 70-120 20-150 135-175
BIS-6 -0.035 -0.28 150 120 180 70-120 20-150 135-175
BIS-8 -0.035 -0.28 150 120 180 70-120 20-150 135-175
BIS-9 -0.035 -0.28 150 120 180 70-120 20-150 135-175
Physical
Properties		 Density Hardness Tensile Yield Strength
(Mpa)		 Water Absorption (%)
g/cm3 R PA6 PA12 PPS PA6 PA12 PPS
BIS-3 3.0-5.8 88-131 18-145 12-171 13-150 0.3-11 .05-3.2 .02-.05
BIS-6 4.5-5.1 90-130 20-140 13-170 13-150 0.3-11 .05-3.2 .02-.05
BIS-8 5.3-5.6 92-133 20-142 13-171 13-150 0.3-11 .05-3.2 .02-.05
BIS-9 5.4-5.8 95-135 22-145 15-171 13-150 0.3-11 .05-3.2 .02-.05

Grade Process Orientation
SAM 15
Compression
Diametral/Transverse
SAM 5
Compression
SAM 15R
Compression
Radial
SAMLET 9R
Injection
Radial
SAM13A
Compression
Axial (thickness)
SAMLET 10A
Injection
Axial (thickness)
SAM 15A
Compression
Axial (thickness)
SAM 11R
Compression
Radial
SAM 17
Compression
Diametral/Transverse
SAMLET 3
Injection
SAMLET 7R
Injection
Radial
SAMLET 8A
Injection
Axial (thickness)

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