|
|
     |
| Features |
- Integrated Torque and Speed Conditioning
- Torque Range: 0.1 N·m to 10,000 N·m
(0.07 lb·ft to 7375 lb·ft)
- Accuracy: < 0.1%
- Overload Capacity: 200%
- Overload Limit: up to 400%
- High Speed Applications: up to 50,000 rpm
- Non-Contact (no slip rings)
- No Electronic Components in Rotation
- No Electrical Noise
|
- Single DC Power Supply: 20 to 32 VDC
- Immediate Speed Detection
- Adjustable Torque Signal Frequency Limitation
- Built-in Test Function
- Stainless Steel Shaft
- EMC Susceptibility Conforms to European Standards
- Calibrated
to METAS standards
|
|
|
| Specifications |
| Sales Drawings |
For complete technical specifications and detailed dimension drawings,
download the applicable data sheet (links at bottom of page). |
 |
Series
Model
Number |
Nominal
Rated Torque |
TMB
Series |
TM
Series |
TMHS
Series |
Shaft Ends |
View Drawing |
Accuracy
Class |
Maximum
Speed
(rpm)* |
Accuracy
Class |
Maximum
Speed
(rpm)* |
Accuracy
Class |
Maximum
Speed
(rpm)* |
| N·m |
lb·ft |
Smooth |
Splined |
PDF |
| TM |
TMB |
| 301 |
0.1 |
0.07 |
N/A |
0.2% |
20,000 |
N/A |
X |
|
 |
|
| 302 |
0.2 |
0.15 |
N/A |
< 0.1% |
20,000 |
N/A |
X |
|
|
|
| 303 |
0.5 |
0.37 |
< 0.1% |
6000 |
<
0.1% |
20,000 |
<
0.1% |
40,000 |
X |
|
|
|
| 304 |
1 |
0.7 |
< 0.1% |
6000 |
< 0.1% |
20,000 |
< 0.1% |
50,000 |
X |
|
|
|
| 305 |
2 |
1.5 |
< 0.1% |
6000 |
<
0.1% |
20,000 |
<
0.1% |
50,000 |
X |
|
|
|
| 306 |
5 |
3.7 |
< 0.1% |
6000 |
< 0.1% |
20,000 |
< 0.1% |
50,000 |
X |
|
|
|
| 307 |
10 |
7.4 |
< 0.1% |
6000 |
<
0.1% |
20,000 |
<
0.1% |
50,000 |
X |
|
|
|
| 308 |
20 |
15 |
< 0.1% |
6000 |
< 0.1% |
20,000 |
< 0.1% |
50,000 |
X |
|
|
|
| 309 |
20 |
15 |
< 0.1% |
4000 |
<
0.1% |
10,000 |
<
0.1% |
32,000 |
X |
|
|
|
| 310 |
50 |
37 |
< 0.1% |
4000 |
<
0.1% |
10,000 |
<
0.1% |
32,000 |
X |
|
|
|
| 311 |
100 |
74 |
< 0.1% |
4000 |
< 0.1% |
10,000 |
< 0.1% |
32,000 |
X |
|
|
|
| 312 |
200 |
148 |
< 0.1% |
4000 |
<
0.1% |
10,000 |
<
0.1% |
24,000 |
X |
X |
|
|
| 313 |
500 |
369 |
< 0.1% |
4000 |
< 0.1% |
10,000 |
< 0.1% |
24,000 |
X |
X |
|
|
| 314 |
1000 |
738 |
TMB
Not Available |
<
0.1% |
7000 |
<
0.1% |
16,000 |
X |
X |
|
|
| 315 |
2000 |
1475 |
TMB Not
Available |
< 0.1% |
7000 |
< 0.1% |
16,000 |
X |
X |
|
|
| 316 |
5000 |
3687 |
TMB
Not Available |
<
0.1% |
5000 |
<
0.1% |
12,000 |
|
X |
|
|
| 317 |
10,000 |
7375 |
TMB Not
Available |
< 0.15% |
5000 |
< 0.15% |
12,000 |
|
X |
|
|
|
|
| |
Back to top |
|
| Operating Principles |
| Simple and reliable, the torque meter measuring system is based
on the principle of a variable, torque-proportional transformer
coupling. The principle has been adapted by Magtrol for the
measurement of torque. The measuring system 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. A constant
alternating current with the frequency of 20 kHz flows through
the primary coil. When torque is applied, the slots on the two
cylinders do not overlap. Instead, the deformation zone undergoes
an angular deformation and the slots begin to overlap. Thus,
a torque-proportional EMF is induced in the secondary coil.
The conditioning electronics convert the EMF into a voltage
between +10 and -10 V, depending on the direction of the torque.
Speed measurement is integrated by means of an inductive proximity
transducer trained on a toothed path cut directly into the outer
cylinder. |
| |
| Inside View of TM
Torque Transducer |
 |
| |
| Back to top |
|
| Applications |
| Magtrol torque meters provide dynamic
torque and speed measurement of: |
- Propellers - aerospace, marine and helicopter
- Windshield wipers, electrical windows, starters,
generators and brakes in automobile industry
- Pumps - water and oil
|
- Reduction gears and gearboxes
- Clutches
- Motorized valves
- Drills, pneumatic tools and
other machine tools
- Tachometers
|
|
| |
Torque Limiter Testing
on Drills |
 |
 |
| A Model TM 311 Torque
Transducer is used in the design along with a disc brake,
coupling, swivel and universal joint for accuracy and
reliability. |
BRP 125 Test Bench specially
designed for testing torque limiter on a wide range of
drills from 5 Nm to 200 Nm. |
|
| |
A large manufacturer of hand drills was in need of a test
bench for testing the torque limiters of their drills. The
aim of the test bench was to equip their repair shops with
a versatile, easy and fast system capable of testing a wide
range of repaired drills. The ideal test bench would be a
stable setup with a maximum surface area of 800 × 800 mm,
capable of measuring speed of rotation and maximum trip torque
for a 5-200 Nm range of drills. The test cycle would include
machine assembly, rotation at nominal speed and braking the
machine until the torque limiter trips within a total test
time of 3 minutes maximum per drill.
Magtrol SA was able to meet these expectations with the development
of the BRP 125 Test Bench, using their TM 311 Torque Transducer
along with a disc brake, coupling, swivel and universal joint.
The drill is placed on the test bench and connected to the
system with a quick male/female coupling, held by hand by
the operator. A stop bar prevents the machine from turning
on. The torque is transmitted by means of a Cardan (universal
joint) and a swivel joint. The role of transmission by Cardan
and swivel joint is to allow the test without having to align
and fix the machine. Once the maximum speed is reached, the
drill is braked by means of the disc brake controlled by an
electropneumatic control.
The system is controlled by software that allows the user
to save the test parameters and print out a test certificate
for each drill tested. The certificate contains information
on the type of drill, serial number, nominal speed, nominal
torque, name of tester, date of the test and the test values,
which are also output in a torque/speed diagram.
Since the TM 311 Torque Transducer is particularly suited
to measurements of great accuracy in fairly large ranges,
the BRP 125 Test Bench has been a success with great reliability,
good mechanical stability and an excellent reproducibility
(0.5%). The users are very satisfied with the performance
and functionality of the bench. |
| |
| Back to top |
| |
|
