Saber Prop Extensions

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.

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.

Flange Engine	Bolt Circle SAE No.	Lug Dia	Eng. Bolt Dia.	Size
Cont., A-65, A-75, C-85, C-90, O-200	SAE 1	4-3/8"	5/8"	3/8"
Lycoming O-235	SAE 1 or 2		5/8"	3/8"
Lycoming O-290	SAE 2	4-3/4"	5/8"	3/8"
Lycoming O-320	SAE 2 or 5	4-3/4"	5/8"	3/8" or 7/16"
Lycoming O-360	SAE 6	4-3/4"	3/4"	1/2"
Lycoming O-540	SAE 6	4-3/4"	3/4"	1/2"

PLEASE ORDER USING THE FOLLOWING PART NO:

Example:
4 x7 - 7/16 E - 3/8P thr - S2 - Lyc 0320 - wood - wood

Go to Propeller Ordering Requirements Form

Download Propeller Extension Form

12 Hole Soild Prop Extension with Threaded Drive Lugs
1.25"x 6"	1.25"x 7"
2.25" x 6"	2.25" x 7"
3" x 6"	3" x 7"
4" x 6"	4" x 7"
8" x 6"	6" x 7"
	8" x 8"

Similar Items: Click Here for Drive Lugs