 Founded
in 1984 - Saber Mfg. specializes in prop extensions. Since their
founding, they
have machined their
spool extensions exclusively from test-certified 2024 T-351 which has
the necessary strength and fatigue resistance for this application.
In addition to the standard Continental and Lycoming patterns, they
have designed adapters for the Franklin engine as well as hybrid bolt
patterns and custom lengths, and have fabricated several magnesium extensions
for Formula I air races.
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For
engines over 150 hp (0320 and 0360), they
offer their
extensions with a 7" diameter prop flange, thus providing more than 30%
INCREASE IN GRIP AREA, while adding only 5 ounces of weight. Wood
props are subject to the effects of changing temperature and humidity,
and the added grip area greatly decreases the prop's susceptibility to
loosening. |
 The
lugs are machined from 17-4 PH STAINLESS STEEL, flanged, and held
to close
tolerance required by their interference fit.
Unlike tubular lugs which can vibrate forward into the counterbores
of the wood prop, their
lugs are custom machined with a shoulder to prevent such forward
movement. Internal threading allows removal of prop or retorqueing
of bolts with the upper cowling in place. Their
choice of 17-4 results in a THREAD OF SUPERIOR STRENGTH over 4130
alloy steel, while preserving the same characteristics of
ductility, lack of brittleness, and freedom from galling.
The 17-4 also offers excellent corrosion resistance, which is a weakness
of Cad plated alloy steels. |
PLEASE
ORDER USING THE FOLLOWING PART NO:
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Example:
4 x7 - 7/16 E - 3/8P thr - S2 - Lyc 0320 - wood - wood |
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Download Propeller Extension Form |
Airframe Parts - Propellers