Description
LB 200 Series – Load Measuring Pin
Product Description
LB 200 Series Load Measuring Pins can be used alone or as part of a complete measurement system. Magtrol offers a wide range of Load-Force-Weight Transducers in various executions and accuracy classes and our Load Monitoring Units (LMUs) constitute an ideal safe measurement system which continuously checks for overloads and short circuits.
MAGTROL Load Measuring Pins are 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. Manufactured in Switzerland, Magtrol’s LB 200 Series Load Pins are rugged with high resistance stainless steel and tight construction, designed specifically for use in harsh industrial environments. Available in several standard ranges from 2.5 kN to 1250 kN, these highly ergonomic pins can be used for either new or refitted installations and are adaptable to various conditions.
Design
The Magtrol Load Pin has 2 circular grooves and an axial bore. Inside the central bore, adjacent to the external grooves, the strain gauges are mounted in a full-bridge configuration. The positioning and orientation of the strain gauges have been optimized by means of the finite element method (FEM). Any transverse or axial forces, even when acting on any part of the pin, have practically no influence on the measurement signal.
Receive a quotation for a load pin according to your application’s dimensions by filling out our load pin inquiry form.
Features
- For overload detection and load measurement from 2.5 kN … 1 250 kN (0.28 tf … 140.5 tf).
- Admissible Overload: 150 % of the nominal load.
- Overload at Rupture: up to 500 % of the nominal load.
- Insensitive to external mechanical and chemical effects.
- Ideal for use in hostile environments.
- Temperature-compensated transducers with strain gauges in full-bridge configuration. On request, available with double bridge redundant.
- Simple installation for cost-saving solutions to measurement problems.
- Many options may be added to the lower-cost standard load pin for greater flexibility.
- Can be designed with special dimensions for adaptation to various construction conditions.
- High reliability for strict safety requirements.
Specifications
For complete technical specifications and general dimension drawings, download the corresponding data sheet. For detailed dimension drawings. Click on the underlined link in the table below and a PDF document will open in a new window. Ratings apply to standard load pins only, special models are available by contacting Magtrol.
| Model(s) | Nominal Load (kN) |
Nominal Load (tf) |
Nominal Diameter (mm) |
Drawing | 3D Models LB-210 Series (PG Radial) |
3D Models LB-210 Series (PG Axial) |
|---|---|---|---|---|---|---|
| LB 210 | 2.5 | 0.28 | 25 | N/A | step | |
| LB 211 | 5 | 0.56 | 25 | N/A | step | |
| LB 212 | 10 | 1.12 | 25 | N/A | step | |
| LB 213 | 20 | 2.25 | 25 | N/A | step | |
| LB 214 | 50 | 5.62 | 35 | step | step | |
| LB 216 | 100 | 11.24 | 50 | step | step | |
| LB 217 | 200 | 22.48 | 65 | step | step | |
| LB 218 | 500 | 56.20 | 85 | step | step | |
| LB 220 | 1000 | 112.40 | 100 | step | step | |
| LB 221 | 1250 | 140.50 | 120 | step | step |
TECHNICAL SPECIFICATIONS
| STANDARD VERSION a) | LB 210 | LB 211 | LB 212 | LB 213 | LB 214 | LB 216 | LB 217 | LB 218 | LB 220 | LB 221 |
|---|---|---|---|---|---|---|---|---|---|---|
| LOAD MEASURING | ||||||||||
| Nominal Load (Metric)b) | 2.5 kN | 5 kN | 10 kN | 20 kN | 50 kN | 100 kN | 200 kN | 500 kN | 1 000 kN | 1 250 kN |
| Nominal Load (US) b) | 0.28 tf | 0.56 tf | 1.12 tf | 2.25 tf | 5.62 tf | 11.24 tf | 22.48 tf | 56.2 tf | 112.4 tf | 140.5 tf |
| Overload Admissible (% of NL) | 150 % (of nominal load without influence on measurement) | |||||||||
| Overload at Rupture (% of NL) | > 500 % | 400 % | 300 % | |||||||
| Non-linearity Error b) | < 0.25 % | < 0.5 % | ||||||||
| Non-linearity + Hysteresis Error b) | < 0.5 % | < 0.8 % | ||||||||
| Repeatability b) | ± 0.1 % | |||||||||
| MECHANICAL CHARACHTERISTICS & ENVIRONMENT | ||||||||||
| Technology | Full-bridge strain gauge | |||||||||
| Material | Stainless steel 1.4057 | |||||||||
| Lubrication | Not available | Oiler ø4 DIN 3405 D or M10 DIN 3405 A | ||||||||
| Operating Temperature | – 25 °C … + 80 °C | |||||||||
| Storage Temperature | – 55 °C … + 125 °C | |||||||||
| Temperature Influence on Zero | ± 0.02 % / K | |||||||||
| Temperature Influence on Sensitivity | ± 0.02 % / K | |||||||||
| Fit | G7 / h6 | |||||||||
| Angle influence on signal output c) | According to the cosine function | |||||||||
| Protection Class | IP 66 according to DIN 60529 | |||||||||
| ELECTRICAL CHARACTERISTICS & CONNECTIONS | ||||||||||
| Bridge Impedance Input | 400 Ω | |||||||||
| Bridge Impedance Output | 350 Ω | |||||||||
| Power Supply | 5 … 12 VDC | |||||||||
| Zero Adjustment b) | ± 1 % | |||||||||
| Transducer Sensitivities | 0.5 mV/V ± 3 % | 1 mV/V ± 3 % | 1.8 mV/V ± 3 % | |||||||
| Output | Integrated 3 m, 6 m, 12 m or 20 m polymer cable K-424 (standard) e) | |||||||||
| PG Output | Axial, with heat-shrinkable sleeve | Radial, with heat-shrinkable sleeve (standard); Axial, with heat-shrinkable sleeve |
||||||||
| Output Connector (Optional) | Not available | Radial, connector: Souriau 851 02 E 10 6P50 | ||||||||
| Connection Cable Assembly (Optional) | Not available | 3 m, 6 m, 12 m or 20 m cablewith axial or 90° connector d) e) | ||||||||
a) Rating apply to standard load pins only, special models available on request.
b) Full Scale.
c) Variation of the measuring signal due to the angle positioning.
d) Axial connector: Souriau 851 06 JC 10 6S50, 90° connector: Souriau 851 08 EC 10 6S50.
e) Other longer cable lengths availble on request.
Operating Principles
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 by an external amplifier. Depending on the execution, this amplifier allows the monitoring of several levels.
Applications
When forces acting on mechanical constructions are measured, the additional equipment required can often be costly and difficult to install. Magtrol Load Measuring Pins offer an excellent solution since they act as a direct element in the assembly, replacing a non-instrumented pin or shaft. LB 200 Series Load Pins are used for load measuring devices and overload protection on cranes, hoisting gear, elevators and winches, and force measurement for regulation processes in industrial installations and machinery production. Moreover it is an idealy transducer to detect and measure forces in harsh, tropical, offshore, marine and harbor environments.
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