We utilize the Hale MRITM computerized propeller measurement system that is distributed by Michigan Wheel the world leader in propeller design. All inboard propellers on our website are between class 2 and class 3 tolerance. For customers that desire a more accurate new propeller we offer our high tolerance upgrade service that includes:
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Adjusting your new propeller purchase to a Class 1 ISO tolerance for improved performance, speed and fuel consumption.
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Our upgrade service is recommended for boats with speeds greater than 18 knots.
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Our upgrade service is good in twin screw vessels for synchronized engine load.
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A computer print out of your propellers final dimensions proving it's within tolerance.
NOTE: Our online upgrade service is only available with a new inboard propeller purchase.
ISO Accuracy Classes
|
Class |
Manufacturing Accuracy |
|
S |
Very High Accuracy |
|
1 |
High Accuracy |
|
2 |
Medium Accuracy |
|
3 |
Wide Tolerances | |
ISO Pitch Tolerances
|
Class |
S |
1 |
2 |
3 |
|
Local Pitch |
+-1.5% |
+-2% |
+-3% |
--- |
|
Section Pitch |
+-1% |
+-1.5% |
+-2% |
+-5% |
|
Blade Pitch |
+-0.75% |
+-1% |
+-1.5% |
+-4% |
|
Propeller Pitch |
+-.5% |
+-0.75% |
+-1% |
+-3% | |