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 English Measure)

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
.SLDPRT		 .STEP
Part Number
Max
Speed
(rpm)
Total
Weight
(kg)
Nominal
Torque
(Nm)
Peak
Torque
(Nm)
A
(mm)
B
(mm)
 C
(mm)		 D
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
I
(mm)
 click here step-2964
MTC-0.1

44000
0.1
0.1
0.2
12.7
5
7
15
6
18
26
19
30
MTC-0.3
26000
0.3
0.3
0.5
22
8
8
16
8
28
44
22
36
  
Download
  
Download
MTC-1
22000
0.8
1.0
1.5
28
10
12
20
10
35
52
28
44
  
Download
  
Download
MTC-3
18000
1.0
3
3.5
35
12
16
32
12
42
64
42
62
  
Download
  
Download
MTC-10
13000
2.5
10
12
58
16
20
35
20
66
90
50
80
  
Download
  
Download

mtd_coax_coup_02

MTC-16 thru MTC-140 INNER HUB OUTER HUB
Part Number
Max
Speed
(rpm)
Total
Weight
(kg)
Nominal
Torque
(Nm)
Peak
Torque
(Nm)
A
(mm)
B
(mm)
C
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
I
(mm)
J
(mm)
K
(mm)
L
(mm)
M
(mm)
N
(mm)
O
(mm)
MTC-16

13000
3.0
16
26
58
26
14
20
62
5
16.3
66
40
19
90
120
6
21.8
MTC-22
9400
7
22
35
88
50
20
30
50
6
22.8
97
50
24
124
120
8
27.3
MTC-30
9400
8
30
48
88
50
24
30
62
8
27.3
97
50
28
124
130
8
31.3
MTC-50
7300
12
50
80
122
80
30
30
50
8
33.3
132
60
38
160
130
10
41.3
MTC-65
7300
15
65
100
122
80
30
40
65
8
33.3
132
60
38
160
145
10
41.3
MTC-80
6500
19
80
130
142
90
35
40
65
10
38.3
152
80
42
180
165
12
45.3
MTC-110
6500
22
110
165
142
90
35
40
80
10
38.3
152
80
42
180
180
12
45.3
MTC-140
6500
29
140
210
142
90
40
40
110
12
43.3
152
80
48
180
210
14
51.8

mtd_coax_coup_03

MTC-180 thru MTC-280 INNER HUB OUTER HUB
Part Number
Max
Speed
(rpm)
Total
Weight
(kg)
Nominal
Torque
(Nm)
Peak
Torque
(Nm)
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
I
(mm)
J
(mm)
K
(mm)
L
(mm)
M
(mm)
MTC-80
6200
23
180
290
142
90
40
60
50
140
12
43.8
152
156
170
190
180
MTC-220
6200
26
220
330
142
90
48
70
60
160
14
52.3
152
156
170
190
200
MTC-280
6200
30
280
380
142
90
48
90
60
180
14
52.3
152
156
170
190
230

 

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.
INNER HUB OUTER HUB
Part Number
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
 H
(mm)
J
(mm)
K
(mm)
# of
Holes
MTC-0.1-SB
36
28
20
15
26
28
4
6
1
4.5
4
MTC-0.3-SB
49
40
30
24
30
32
5
7
1
5.5
4
MTC-1-SB
55
46
36
30
35
37
5
7
1
5.5
6
MTC-3-SB
66
55
44
38
45
50
6.5
10
1
6.6
6
MTC-10-SB
96
83
73
60
60
66
15
6
1
6.6
6
Note: The MTC-0.1 through -10 containment shells are 316 stainless, and are rated to a minimum of 30 Bar. Containment shells for other sizes are made to order and are rated according to customer requirements.