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Load Measuring
Pins |
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| Magtrol Load Measuring
Pins are temperature-compensated transducers used to measure load and force and provide overload
protection. The pins are mounted into machines in place
of normal shafts and fitted with strain gauges, allowing
them to produce a signal proportional to the measured
load. |
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Features |
- From 2.5 to 1250 kN (0.28 to 140 tons)
- Admissible overload: 150% of the nominal load
- Overload at rupture: 350% to 700% of nominal load
(according to the model)
- Pin made of high resistance stainless steel.
- Insensitive to external mechanical and chemical
effects (strain gauges inside the pin)
- Ideal for use in hostile environments
- Rugged and tight construction; maintenance-free
- For new or refitted installations
- ISO 9001 Certified
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Receive a quotation for a load pin according to your application's
dimensions by filling out our load pin inquiry form. |
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| Additional features unique to each series include: |
| LB 230 Series |
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- Certified according to OIML R60 D0.1 from 50 to 200 kN for class IIII scales
- Hermetically sealed execution for harsh environmental conditions (IP 67 protection class)
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| LE/LU 210 Series |
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- Integrated 2-wire (LE) or 4-wire (LU) signal amplifier for transmission over great distances
- EMC execution for reliable trouble-free operation
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| Safety |
| The high safety level
of Magtrol Load Measuring Pins makes their use possible
in the following diversified application fields: |
- Cranes and lifting devices
- Machine industry
- Marine, tankers, offshore oil platforms
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- Nuclear industry
- Aviation
- Chemical industry
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| At the customer's request,
Magtrol can subject its load measuring pins to even more
demanding tests such as: |
- Authenticity of the steel used
- Impact tests by the EMPA (Swiss Federal Laboratory
for Material Testing and Research)
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- Ultrasonic test
- Magnetoscopic test
- Test under reference load
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| Special Load Measuring
Pins |
| Magtrol also
manufactures special load measuring pins according to
customer requirements. This shows our great flexibility
for applications in extreme environments. Additionally,
our computer calculation facilities allow us to respond
quickly to any demand for special load measuring pins. |
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Features
- Customized Dimensions: diameter up to 250 mm/ length
to 600 mm
- High Load Capacity: up to 2500 kN)
- Extended Operating Temperature: from -40°C to +200°C
- High Pressure: up to 100 bar
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| Specifications |
| For complete technical specifications and general dimension drawings,
download the corresponding data sheet.
For detailed dimension drawings… |
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| Click on the underlined link in the table below.
A PDF document will open in a new window. |
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| Ratings apply to standard load pins only, special models are available by contacting Magtrol. |
| Model(s) |
Nominal
Load |
Nominal
Diameter |
| kN |
tf |
mm |
| LB 210 |
2.5 |
0.28 |
24 |
| LB-LE-LU 211 / LB 231 |
5 |
0.56 |
24 |
| LB-LE-LU 212 / LB 232 |
10 |
1.12 |
24 |
| LB-LE-LU 213 / LB 233 |
20 |
2.25 |
24 |
| LB-LE-LU 214 / LB 234 |
50 |
5.62 |
35 |
| LB 235 |
70 |
7.87 |
45 |
| LB-LE-LU 216 / LB 236 |
100 |
11.24 |
48 |
| LB-LE-LU 217 / LB 237 |
200 |
22.48 |
65 |
| LB-LE-LU 218 / LB 238 |
500 |
56.20 |
89 |
| LB-LE-LU 220 / LB 240 |
1000 |
112.40 |
100 |
| LB-LE-LU 221 / LB 241 |
1250 |
140.50 |
120 |
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| Series Ratings |
LB
210
Series |
LB
230
Series |
LE
210
Series |
LU
210
Series |
| Mechanical Characteristics |
| Admissible overload |
150% |
150% |
150% |
150% |
| Overload at rupture |
500% |
500% |
350% to 500%* |
350% to 500%* |
| Electrical Characteristics |
| Bridge
Impedance |
350 ohms |
700 ohms |
5000
ohms |
350 ohms |
| Bridge Configuration |
single |
double |
single |
single |
| Output Signal |
0.5
to 1.8 mV/V |
0.5
to 1.8 mV/V |
4 to 20
mA |
0 to 10
V DC |
| Accuracy (of FSD) |
0.5% to
0.8%* |
< 0.4% |
0.5% to
0.8%* |
0.5% to
0.8%* |
| Power supply |
5 to 12 V DC / AC |
5 to 12 V DC / AC |
12 to 32 VDC
(protected
±) |
12 to 32 VDC
(protected
±) |
| Amplifier |
external |
external |
internal |
internal |
| Output Connection |
PG or
connector |
Connector
only |
Connector
only |
Connector
only |
| Environmental Characteristics |
| Protection class |
IP 66 |
IP 67 |
IP 66 |
IP 66 |
| Operating Temperature |
-25 °C to +80 °C |
| Storage Temperature |
-55 °C to +125 °C |
View/Download
More Information
(printable PDF file) |
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| Operating Principles |
| When forces acting on mechanical constructions
are to be measured, the additional equipment required can
often be costly and difficult to install. The load measuring
pin offers an excellent solution since it acts as a direct
element in the assembly, replacing a non-instrumented pin
or shaft. When employed as a measuring transducer, the load
pin can be used as a replacement for existing pins in: |
| Fixed Points |
Pulleys |
Shackles |
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| Measurement Principle |
| The load measuring pins operate on a shearing principle. We
measure the deformation proportional to the load through a strain
gauge bridge integrated in the pin. When force is applied to
the load measuring pin along its sensitive axis , the effect
on the strain gauge bridge results in an output signal proportional
to the applied force. The powering of the strain gauge bridge,
as well as the amplification of its output signal voltage, is
performed either by an external amplifier (LB series) or through
its internal amplifier (LE and LU series). Depending on the
execution, the amplifier allows the monitoring of several levels. |
| Before load is applied |
After - the load is proportional
to the signal |
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| Single Bridge vs. Double Bridge |
| Single Bridge |
Double Bridge |
- 4 Strain Gauges
- Output Impedance: 350 Ohms
- Used on: Simple and symmetrical mountings
- Standard
accuracy
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- 8 Strain Gauges
- Output Impedance: 700 Ohms
- Used on: Asymmetrical mountings
- High accuracy
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