Magnetic Couplings
Magnetic Couplings

Magnetic Couplings

Transmitting Torque Through Air

Magnetic couplings offer a non-contact transfer of torque. They are typically used in magnetic drive pumps and magnetic mixers for seal-less applications; keeping corrosive, toxic, or flammable liquids from escaping into the atmosphere.

By driving one magnetic hub, torque is transmitted magnetically to the other magnetic hub. This can be done through the air or through a non-magnetic containment barrier such as stainless steel or fiberglass, allowing complete isolation of the inner magnetic hub from the outer magnetic hub. There are no contacting parts in magnetic drive pumps which allows for torque transmission through both angular and parallel misalignment.

  • Eliminates Rotating Seals
  • No Wearing Parts
  • Synchronous Design, No Slip at Any Speed
  • No Physical Contact Between Driving and Driven Parts
  • Safe For Use Up To 140° C, High-Temp Designs Available
  • Custom Designs Available

MTD Disc Couplings

Disc type magnetic couplings consist of two opposing discs with powerful rare earth magnets. The torque applied to one disc is transferred through an air gap to the other disc. Because of its simple flat design, you can have angular misalignment of up to 3º or parallel misalignment up to ¼” and still transmit nearly full rotational torque. You could also fabricate an inexpensive flat barrier to separate the atmospheres or fluids surrounding the two discs. This is our simplest and most versatile coupling.

Typical applications include magnetic mixers and magnetic drive pumps.

Disc type magnetic couplings for magnetic drive pumps and magnetic mixers

Disc type magnetic couplings for magnetic drive pumps and magnetic mixers

Model
Nominal Torque [IN-LB]
Product Datasheet
Solidworks 3D Model
Step 3D Model
MTD-0.2
1
MTD-0.3
4
MTD-0.6
6
MTD-1
9
MTD-2
15
MTD-5
44
MTD-8
72
MTD-12
108
MTD-20
181
MTD-30
270
MTD-40
360
MTD-50
470

MTC Co-Axial Couplings

The co-axial coupling consists of three parts, the inner hub, the outer hub, and the optional containment barrier. Both the inner and outer hubs consist of a series of rare earth magnets that are ground, potted, and glued to steel hubs. The inner hub is then completely sealed in stainless steel to protect the magnets and hub from damage or corrosive substances.

These couplings are ideal for applications such as magnetic mixers, in which the “driven” hub is physically separated and sealed from the “driver” hub.    Magnetic mixers are particularly well suited to applications that involve highly toxic or corrosive chemicals.

coupling sec 1
Model
Nominal Torque [IN-LB]
Product Datasheet
Solidworks 3D Model
Step 3D Model
MTC-0.1
1
Upon Request
Upon Request
Upon Request
MTC-0.3
3
Upon Request
Upon Request
Upon Request
MTC-1
9
Upon Request
MTC-3
27
Upon Request
MTC-10
90
Upon Request
MTC-16
140
Upon Request
MTC-22
200
Upon Request
Upon Request
Upon Request
MTC-30
265
Upon Request
Upon Request
Upon Request
MTC-50
450
Upon Request
Upon Request
Upon Request
MTC-65
575
Upon Request
Upon Request
Upon Request
MTC-80
710
Upon Request
Upon Request
Upon Request
MTC-110
1000
Upon Request
Upon Request
Upon Request
MTC-140
1250
Upon Request
Upon Request
Upon Request
MTC-180
1600
Upon Request
Upon Request
Upon Request
MTC-220
2000
Upon Request
Upon Request
Upon Request
MTC-280
2500
Upon Request
Upon Request
Upon Request
Containment Barriers
Model
Product Datasheet
Solidworks 3D Model
Step 3D Model
MTC-0.1-SB
Upon Request
Upon Request
Upon Request
MTC-0.3-SB
Upon Request
Upon Request
Upon Request
MTC-1-SB
Upon Request
Upon Request
Upon Request
MTC-3-SB
Upon Request
Upon Request
Upon Request
MTC-10-SB
Upon Request
Upon Request
Upon Request
MTC-0.1-SB through MTC-10-SB containment barriers are made from 316 stainless, and are rated to a minimum of 450 psi. Containment shells for other sizes are made to order and are rated according to customer requirements.
Disc vs. Co-Axial
Coupling Comparison
Coupling Image 2 Crop
coupling sec 1
Coupling Style
Disc (MTD)
Co-Axial (MTC)
Axial Forces
High axial force which must be restrained
Coupling finds its own center with ~0 axial force
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
0.25" Max
Ensure coupling hubs (or barrier if used) do not contact
Containment Barrier
Simple flat barrier
Top-hat shaped barrier
Maximum Torque
Designs available up to ~45 ft-lb
Designs available up to ~300 ft-lb
Maximum Operating Temperature
140°C
(Custom high-temp designs available)
140°C
(Custom high-temp designs available)