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.
Note:
The dimensions and ratings for all co-axial type couplings
are shown using only NdFeB 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
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)
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
MTC-1
22000
0.8
1.0
1.5
28
10
12
20
10
35
52
28
44
MTC-3
18000
1.0
3
3.5
35
12
16
25
12
43
54
35
56
MTC-10
13000
2.5
10
12
58
16
20
35
20
66
90
50
80
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
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)
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.
