Magnetic Couplings Co-Axial Type

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

Simple Concept: Opposite Poles Attract.

This attraction is how we transmit torque from one magnetic hub to another. 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.

How Co-Axial Couplings Work

The co-axial coupling consists of three parts. The outer hub consists of a series of rare earth magnets that are ground, potted and attached to the inside diameter of a steel hub. The inner hub consists of a series of rare earth magnets that are ground, potted and attached to the outside diameter of a steel rotor. The inner hub is then completely sealed in stainless steel to protect the magnets and rotor from damage or corrosive substances. Typically there is a radial air gap of up to .275” (7mm) between the inner and outer hubs. Conventional bores and keyways are used to drive the inner and outer hubs.

Specifications – Shown in English measure
(Click here for Metric)

Note: The dimensions and ratings for all co-axial type couplings are shown using only mtd_coax_coup_01NdFeB type rare earth magnets. Ratings and dimensions may vary for the SmCo versions.

Advantages of Co-Axial Type Couplings

  • Eliminates Rotating Seals
  • No Wearing Parts
  • Synchronous Design, No Slip at Any Speed
  • No Physical Contact Between Driving and Driven Parts
  • Custom Designs Available

 

MTC-0.1 thru MTC-10 INNER HUB OUTER HUB SOLID MODEL .STEP
Part Number
Max
Speed
(rpm)
Total
Weight
(lb)
Nominal
Torque
(in/lb)
Peak
Torque
(in/lb)
A
(in)
B
(in)
C
(in)
D
(in)
E
(in)
F
(in)
G
(in)
H
(in)
I
(in)

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step-2964
MTC-0.1
44000
0.2
1.0
1.75
0.50
0.197
0.28
0.59
0.236
0.71
1.02
0.75
1.18
MTC-0.3
26000
0.6
2.6
4.5
0.87
0.315
0.31
0.63
0.315
1.10
1.73
0.87
1.42
   
MTC-1
22000
1.7
9
13
1.10
0.394
0.47
0.79
0.394
1.38
2.13
1.10
1.73
   
MTC-3
18000
2.2
27
30
1.38
0.472
0.63
1.26
0.472
1.654
2.52
1.65
2.44
   
MTC-10
13000
5.5
90
105
2.28
0.630
0.79
1.38
0.787
2.60
3.54
1.97
3.15
   

mtd_coax_coup_02

MTC-16 thru MTC-140 INNER HUB OUTER HUB SOLID MODEL .STEP
Part Number
Max
Speed
(rpm)
Total
Weight
(lb)
Nominal
Torque
(in/lb)
Peak
Torque
(in/lb)
A
(in)
B
(in)
C
(in)
E
(in)
F
(in)
G
(in)
H
(in)
I
(in)
J
(in)
K
(in)
L
(in)
M
(in)
N
(in)
O
(in)

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step-2964
MTC-16
13000
6.6
140
230
2.28
1.02
0.551
0.79
2.44
0.20
0.64
2.60
1.57
0.748
3.54
4.72
0.24
0.86
 
MTC-22
9400
16
200
310
3.47
1.97
0.787
1.18
1.97
0.24
0.90
3.82
1.97
0.945
4.88
4.72
0.31
1.07
MTC-30
9400
18
265
425
3.47
1.97
0.945
1.18
2.44
0.31
1.07
3.82
1.97
1.102
4.88
5.12
0.31
1.23
MTC-50
7300
26
450
708
4.80
3.15
1.181
1.18
1.97
0.31
1.31
5.20
2.36
1.496
6.30
5.12
0.39
1.63
MTC-65
7300
33
575
885
4.80
3.15
1.181
1.57
2.56
0.31
1.31
5.20
2.36
1.496
6.30
5.71
0.39
1.63
MTC-80
6500
42
710
1151
5.59
3.54
1.378
1.57
2.56
0.39
1.51
5.98
3.15
1.654
7.09
6.50
0.47
1.78
MTC-110
6500
48
1000
1460
5.59
3.54
1.378
1.57
3.15
0.39
1.51
5.98
3.15
1.654
7.09
7.09
0.47
1.78
MTC-140
6500
64
1250
1859
5.59
3.54
1.575
1.57
4.33
0.47
1.70
5.98
3.15
1.890
7.09
8.27
0.55
2.04

mtd_coax_coup_03

MTC-180 thru MTC-280 INNER HUB OUTER HUB SOLID MODEL .STEP
Part Number
Max
Speed
(rpm)
Total
Weight
(lb)
Nominal
Torque
(in/lb)
Peak
Torque
(in/lb)
A
(in)
B
(in)
C
(in)
D
(in)
E
(in)
F
(in)
G
(in)
H
(in)
I
(in)
J
(in)
K
(in)
L
(in)
M
(in)

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step-2964
MTC-180
6200
51
1600
2567
5.59
3.54
1.575
2.36
1.97
5.51
0.47
1.72
5.98
6.142
6.69
7.48
7.09
MTC-220
6200
57
2000
2921
5.59
3.54
1.890
2.76
2.36
6.30
0.55
2.06
5.98
6.142
6.69
7.48
7.87
MTC-280
6200
66
2500
3363
5.59
3.54
1.890
3.54
2.36
7.09
0.55
2.06
5.98
6.142
6.69
7.48
9.06

 

Technical Data
Inner Cylinder
300 Stainless Steel, Hermetically Sealed
Outer Cylinder
Mild Steel, All Magnets Encapsulated
Magnet (Nickel-Plated)
NdFeB*
Operating Temp*
140C (284F)
*Note:
Co-Axial couplings are also available with SmCo magnets, rated up to 280C (536F)

mtd_coax_coup_04

Optional Containment Barrier
An optional stainless steel barrier can be used to separate the atmosphere or fluids surrounding the inner and outer hubs. This eliminates the need for a rotating shaft seal. Both standard and custom barrier designs up to 75 hp are available. All sizes over MTC-10-SB are made to order. All designed applications are economically produced, even in small quantities.
STOCK CONTAINMENT BARRIER SOLID MODEL .STEP
Part Number
A
(in)
B
(in)
C
(in)
D
(in)
E
(in)
F
(in)
G
(in)
H
(in)
J
(in)
K
(in)
# of
Holes

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step-2964
MTC-0.1-SB
1.42
1.102
0.79
0.591
1.02
1.10
0.16
0.24
0.039
0.18
4
   
MTC-0.3-SB
1.93
1.575
1.18
0.945
1.18
1.26
0.20
0.28
0.039
0.22
4
   
MTC-1-SB
2.17
1.811
1.42
1.181
1.38
1.46
0.20
0.28
0.039
0.22
6
   
MTC-3-SB
2.60
2.165
1.73
1.496
1.77
1.97
0.26
0.39
0.039
0.26
6
   
MTC-10-SB
3.78
3.268
2.87
2.362
2.36
2.60
0.59
0.24
0.039
0.26
6
   
Note: The MTC-0.1 through -10 containment shells are 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.