 Kahlenberg utilizes the Hale M.R.I. (Measurement Recording Instrument) to digitally scan and record complete geometric propeller data from your propeller.
Within minutes, thousands of data points are measured and recorded. These measurements reveal: local pitch, mean pitch per radius, mean pitch per blade, angular and axial deviation per blade, blade contour, and rake.
The benifits of propeller calibration and repair utilizing the Hale MRI include:
- synchronized propeller loading
- improved speed and fuel efficiency
- reduced vibration and noise
In addition to the benefits above, a permanent record of propeller measurements is created and maintained in a database for future reference.
In almost all cases, even when measuring new propellers, performance can be improved by correcting propeller inadequacies found through the use of the Hale MRI.
Measurement with a tool such as the Hale MRI is the only way to know whether your propellers are precisely tuned for your vessel.
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Kahlenberg repairs and tunes propellers to ISO 484-2 Standards. These measurement standards, developed by the International Standards Organization, are used to determine how accurately the propeller is manufactured or repaired.
ISO 484-2 separates propellers into four classes.
These classes can be summarized as follows:
Class S____Best, Very High Tolerance
Class I_____Very Good, High Tolerance
Class II____Average Tolerance
Class III____Low Tolerance
It is important to consider that most new propellers only meet Class II or Class III tolerances.
Propellers tuned to Class I and Class S pitch tolerances will improve performance, fuel efficiency, and provide smoother operation. Properly tuned propellers also reduce stress and wear on engines and bearings.
Kahlenberg repairs propellers of bronze, NIBRAL (Nickel Aluminum Bronze), and stainless steel to Class II, Class I or Class
S pitch tolerances. Propeller diameters from 12 inches up to approximately 120 inches in diameter can be accomodated. The Hale MRI system measures propellers up to 54" in diameter. Larger sizes are measured manually with pitchometers manufactured
by Kahlenberg.
Detailed propeller condition reports are supplied for each customer order including initial propeller measurements
and measurements after repairs are completed.
For propeller sizing, please complete and submit this form to our Engineering Department: Vessel Data Form
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Replacement propeller sales
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