Non-contact Magnetic Disc Couplings

Magnetic Disc Couplings,high speed flexible disc Magnetic shaft couplings,Disc Type Magnetic Couplings with Bearing,Disc Type Magnetic Couplings,PM eddy-current couplings,FDS-W/FBS-W Type Contactless Coupling

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Quality assurance, one year warranty

What is magnetic disc couplings ?

Magnetic disc couplings provide a contactless means of torque transfer. They are predominantly utilized in pumps for applications requiring seal-less operation, thereby preventing the escape of corrosive, toxic, or flammable liquids into the atmosphere.
The concept is straightforward: Opposite poles attract. This fundamental principle enables the transmission of torque from one magnetic hub to another. By rotating one magnetic hub, the torque is magnetically conveyed to the companion hub. This transmission can occur through air or via a non-magnetic barrier like stainless steel or fiberglass, achieving complete isolation of the inner from the outer hub. The design excludes any contacting components.

Understanding magnetic disc couplings

Magnetic disc couplings are composed of two opposing discs that incorporate powerful rare earth magnets. Torque applied to one disc is conveyed across an air gap to the other disc. Thanks to their simple, flat design, these couplings can accommodate angular misalignment of up to 3 degrees or parallel misalignment of up to 1/4 inch while still transmitting a significant portion of the rotational torque. Moreover, an affordable flat barrier can be fabricated to separate the atmospheres or fluids surrounding the two discs.

Magnetic disc couplings parameter

Model	(A) O.D	(B) I.D	(C) Height	D	E	F	G	H	M	Torque (interval: 1mm)	Torque (interval: 5mm)
CDS12-B	12	4,5,6	16	12	--	--	--	--	M3	0.05N.m	--
CDS24-B	24	6,8,10	18	18	10	5	6	3.2	M4	0.42N.m	0.04N.m
CDS28-B	28	6,8,10	18	20	10	5	10	4.2	M4	0.75N.m	0.12N.m
CDS32-B	32	8,10,12	18	24	10	5	12	4.2	M5	1.95N.m	0.32N.m
CDS38-B	38	8,10,12,15	18	28	10	5	15	5.2	M5	2.98N.m	0.82N.m
CDS43-B	43	12,15,20	20	30	12	5	15	5.2	M5	3.8N.m	1.2N.m
CDS50-B	50	12,15,20	22	34	13	6	20	5.5	M5	4.2N.m	1.5N.m
CDS63-B	63	15,18,20,25	25	36	15	6	26	5.5	M5	11N.m	4.5N.m
CDS68-B	68	15,18,20,25	30	40	18	8	30	6.2	M5	16.2N.m	7.8N.m
CDS78-B	78	18,20,25,30	32	42	18	10	33	6.2	M5	18.5N.m	10N.m

Please Note:

1. B stands for magnetic disc couplings which is the shaft diameter; for example, if your shaft diameter is 15mm, the model you need to order is: CDS-68-15;
2. We are the original manufacturer for magnetic disc couplings, we provide very flexible customizability; any grade of magnet, any material, one-year warranty, lifetime technical support.

Advantages of magnetic disc couplings

• Very low noise and vibration
• No wear No dust
• No heat generation
• Oil-free
• Power transmission through wall
• Torque limiter function
• Easy attaching and detaching
• Large tolerance for declination and eccentricity

Magnetic disc vs co-axial coupling comparison

Magnetic disc vs co-Axial coupling comparison
Coupling style	Magnetic disc couplings ( CDS )	Co-axial magnetic couplings ( CI )
Permanent-magnetic	√	√
Contactless	√	√
Maintenance-free	√	√
Torsionally flexible	√	√
Low vibrations	√	√
Material	SUS304  (custom SUS316,PVC available)	SUS304  (custom SUS316,PVC available)
Containment shroud	None	Optional
Axial forces	High axial force which must be restrained	Coupling finds its own center with ~0 axial force
Shaft fixing method	Small size type A,  big size type B & C available	Type B
Slip torque adjustment	Air gap can be adjusted  to increase or decrease slip torque	Coupling hubs can be seperated axially  to decrease slip torque (axial force will result)
Angular misalignment capacity	3° Max	Ensure coupling hubs  (or barrier if used) do not contact
Parallel misalignment capacity	6.35mm (0.25in) Max	Ensure coupling hubs  (or barrier if used) do not contact
Containment barrier	Simple flat barrier	Top-hat shaped barrier
Maximum torque [N.m]	18.5N.m	84N.m
Max. pressure resistance [bar]	Up to 80 bars depending on size	Up to 90 bars depending on size
Max. temperature resistance [°C]	150/300 depending on magnet material	150/300 depending on magnet material

FAQ for magnetic disc couplings