8
Magtrol TM Series In-Line Torque Transducers
Chapter 1 – Introduction
3
TM 309 – TM 313
Dimensions
A
B
C
F
D
E
CAUTION!
ROTATING PARTS
IN OPERATION.
STOP SYSTEM BEFORE
PERFORMING
MAINTENANCE.
E
60°
F
G
H
Q
R
M
CC
V
W
X
Y
Z
GG
AA
N
DD
EE
N
J
K
A*
B
C D
T
HH
S
Permitted
Axial Thrust
L
P
U
* Centering Seat
LL
JJ
KK
FF
NOTE:
Original dimensions are in Metric units.
Dimensions converted to English have
been rounded up to 3 or 4 decimal places.
The measuring system, based on the principle of a variable, torque-
proportional transformer coupling, consists of two concentric
cylinders shrunk on the shaft on each side of the shaft’s deformation
zone, and two concentric coils attached to the housing.
Both cylinders have a circularly disposed coinciding row of
slots and rotate with the shaft inside the coils. An alternating
current with the frequency of 20 kHz flows through the primary
coil. When no torque is applied, the slots on the two cylinders
fail to overlap. When torque is applied, the deformation zone
undergoes an angular deformation and the slots begin to overlap.
Thus a torque-proportional voltage is on the secondary coil. The
conditioning electronic circuit incorporated in the transducer
converts the voltage to a nominal torque signal of 0 to ±5 VDC. A
low-pass filter (Butterworth/2nd order), adjustable from 5 kHz to
1 Hz, allows tuning of the torque signal frequency limitation.
An optical sensor reads the speed on a toothed path machined
directly on the measuring system. The electronic conditioner
outputs a frequency signal proportional to the shaft rotational
speed. An active circuit compensates the zero and sensitivity
temperature drifts within a tolerance of 0.1% / 10 K.
operating principles
Model units
U
V
W
X
Y
Z
AA
CC
DD
EE
FF
GG
HH
Ø JJ
KK
LL
309/X11
mm
29.4
12
76
10
110
130
74
87 60
(
0
-0.05
)
45
±0.025
8
74 90
±0.05
6.6
M5×10
20
in
1.157 0.472 2.992 0.394 4.331 5.118 2.913 3.425
2.3622
2.3603
1.7726
1.7707 0.315 2.913
3.5453
3.5413 0.260 M5×0.394 0.787
310/X11
mm
39.4
12
76
10
110
130
74
87 60
(
0
-0.05
)
45
±0.025
8
74 90
±0.05
7
M5×10
20
in
1.551 0.472 2.992 0.394 4.331 5.118 2.913 3.425
2.3622
2.3603
1.7726
1.7707 0.315 2.913
3.5453
3.5413 0.276 M5×0.394 0.787
311/X11
mm
44.4
12
76
10
110
130
74
87 60
(
0
-0.05
)
45
±0.025
8
74 90
±0.05
7
M5×10
20
in
1.748 0.472 2.992 0.394 4.331 5.118 2.913 3.425
2.3622
2.3603
1.7726
1.7707 0.315 2.913
3.5453
3.5413 0.276 M5×0.394 0.787
312/X11
mm
53.8
18
83
10
119
139
80
87 75
(
0
-0.05
)
50
±0.025
10
80 100
±0.05
9
M6×8
26
in
2.118 0.709 3.268 0.394 4.685 5.472 3.15 3.425
2.9527
2.9508
1.9695
1.9675 0.394
3.15
3.9390
3.9350 0.354 M6×0.315 1.024
313/X11
mm
63.8
18
83
10
119
139
80
87 75
(
0
-0.05
)
50
±0.025
10
80 100
±0.05
9
M6×8
26
in
2.512 0.709 3.268 0.394 4.685 5.472 3.15 3.425
2.9527
2.9508
1.9695
1.9675 0.394
3.15
3.9390
3.9350 0.354 M6×0.315 1.024
Model units Ø A
Ø B
Ø C
Ø D
E
F
G
H
J
K
L
M
N
P
Q
R
S
Ø T
309/X11
mm
82g6
64
9.6
6.4 M6
5.0
16
21 26.2 16.8
86 170.4
60
20
15 26.4
25 20h6
in
3.2283
3.2270 2.52 0.378 0.252 M6 0.197 0.63 0.827 1.031 0.661 3.386 6.709 2.362 0.787 0.591 1.039 0.984
0.7874
0.7869
310/X11
mm
82g6
64
9.6
6.4 M6
5.0
16
21 36.2 16.8
86 190.4
60
20
15 36.4
35 20h6
in
3.2283
3.2270 2.52 0.378 0.252 M6 0.197 0.63 0.827 1.425 0.661 3.386 7.496 2.362 0.787 0.591 1.433 1.378
0.7874
0.7869
311/X11
mm
82g6
64
9.6
6.4 M6
5.0
16
21 41.2 16.8
86 200.4
60
20
15 41.4
40 20h6
in
3.2283
3.2270 2.52 0.378 0.252 M6 0.197 0.63 0.827 1.622 0.661 3.386 7.89 2.362 0.787 0.591 1.63 1.575
0.7874
0.7869
312/X11
mm
96g6
78 14.9 10.5 M10
7.5
22
30 46.4 22.8
91 228.0
60
25
21 46.8
45 30h6
in
3.7791
3.7782 3.071 0.587 0.413 M10 0.295 0.866 1.181 1.827 0.898 3.583 8.976 2.362 0.984 0.827 1.842 1.772
1.1811
1.1806
313/X11
mm
96g6
78 14.9 10.5 M10
7.5
22
30 56.4 22.8
91 248.0
60
25
21 56.8
55 30h6
in
3.7791
3.7782 3.071 0.587 0.413 M10 0.295 0.866 1.181 2.22 0.898 3.583 9.764 2.362 0.984 0.827 2.236 2.165
1.1811
1.1806
transDucers with smooth shaFt
