Crankshaft deflection measurement on large diesel engines is a simple yet effective way to monitor the straightness of the shaft and the condition of the main bearings. By checking deflection at defined crank positions, operators can detect bending, misalignment or bearing wear at an early stage.
Regular tests are an important part of condition-based maintenance, as thermal loads, wear and alignment issues gradually increase mechanical stress long before obvious symptoms appear. Periodic measurements and documentation help identify trends, plan corrective actions in time and prevent serious damage, unplanned off‑hire and costly repairs.
Reliable shaft deflection monitoring with the DI-5C for efficient maintenance and diagnostics.
Most engineers know how important regular checks of engine crankshafts are. The old analogue dial gauges for checking the crankshaft alignment were time-consuming, uncomfortable and dirty and gave inaccurate accuracies. Using the DI-5 series electronic crankshaft and deflection measurement makes the job much easier and improves accuracy.
A large number of engineers in over 90 countries worldwide have used the DI-5 series.
Our customers are diesel engine manufacturers who equip their engines with an instrument for the service programme, service companies and shipping companies.
Benefit DI-5
DI-5C
DI-5C-Application
Prisma_Tibro_PC-software_Prisma_DI_Ovality
Description
Product range
Technical specification
Four buttons on the DI-5 panel are used to select, change and apply values on the display such as temperature, engine number, number of cylinders, measurement direction, etc. . Just press the OK button to save the value.
After completion of the first cylinder, bring the sensor to the next cylinder and save the measured values. Due to the generous measuring range, the transmitter can be moved between the cylinders without mechanical adjustment. When all cylinders are measured, the hard copy can be downloaded to a PC for reference and future comparison (Option DI-5C).
- A pleasant and clean operation compared to the old dial gauge.
- Download measurements to your computer to save, track, print and compare your engine wear.
- Measure the deviations with the extreme accuracy of 0.001 mm
- Battery for mobile use
- Large measuring distance 60 – 574 mm (with different transducers)
- USB connection to PC (option: DI-5C)
Option 1: DI-5TX Crankshaft/Deflection Gauge, measuring range 89-565 mm
Option 2: DI-5STX Crankshaft/Deflection Gauge, measuring range 60-536 mm
Option 3: DI-5CTX Crankshaft/Deflection Gauge incl. PC software, measuring range 89-565 mm
Option 4: DI-5CSTX Crankshaft/Deflection Gauge incl. PC Software, measuring range 60-536 mm
Optionally available: Ovality kit
* Analogue measuring instruments on request
| DI-5C | DI-5C Small | DI-5 | DI-5 Small | |
| Transducer | 89 mm | 60 mm | 89 mm | 60 mm |
| Memory & transfer to Windows-PC | Yes | Yes | No | No |
| Export as Excel | Yes | Yes | No | No |
| Measuring distance | 89-565 mm | 60-536 mm | 89-565 mm | 60-536 mm |
| Measuring range | +/- 2.048 mm | +/- 1.000 mm | +/- 2.048 mm | +/- 1.000 mm |
| Resolution | 0.001 mm | 0.001 mm | 0.001 mm | 0.001 mm |
| Zero balance range | +/-2.048 mm | +/-1.000 mm | +/-2.048 mm | +/-1.000 mm |
| Zero drift | <0.001 mm per 5 minutes | <0.001 mm per 5 minutes | <0.001 mm per 5 minutes | <0.001 mm per 5 minutes |
| Instrument operating range | 0-55°C 32-130°F | 0-55°C 32-130°F | 0-55°C 32-130°F | 0-55°C 32-130°F |
| Transducer operating range | 0-80°C 32-175°F | 0-80°C 32-175°F | 0-80°C 32-175°F | 0-80°C 32-175°F |
| Battery | 3,6 V Lithium-ion, re-chargeable | 3,6 V Lithium-ion, re-chargeable | 3,6 V Lithium-ion, re-chargeable | 3,6 V Lithium-ion, re-chargeable |
| Batteri life | 10 hours/charge, shelf life 5 years | 10 hours/charge, shelf life 5 years | 10 hours/charge, shelf life 5 years | 10 hours/charge, shelf life 5 years |
| Extension bars (Invar alloy) | 10, 20, 40, 80 and 2×160 mm | 10, 20, 40, 80 and 2×160 mm | 10, 20, 40, 80 and 2×160 mm | 10, 20, 40, 80 and 2×160 mm |
| Cable | 7 meter | 7 meter | 7 meter | 7 meter |
| Weight | 3.3 kg | 3.1 kg | 3.3 kg | 3.1 kg |
| Dimensions, mm Instrument Transducer Case | 190 x 167 x 50 Ø31 x 81 300 x 280 x 140 | 190 x 167 x 50 Ø22 x 56 300 x 280 x 140 | 190 x 167 x 50 Ø31 x 81 300 x 280 x 140 | 190 x 167 x 50 Ø22 x 56 300 x 280 x 140 |