PROP EXTENSIONS

We have designed our transitions from one inner diameter to another using a special S-Curve. This feature strengthens the part, as does our guarantee of machine work FREE OF TOOL MARKS AND CHATTER, critical in a safety part as this, where a stress riser could propagate a crack under the stress of vibration and torque reversal.  Because imbalance can have catastrophic results, we also guarantee PARALLELISM between the faces of the prop extension, as well as CONCENTRICITY among centering boss, center bore, barrel OD, flange OD's, and bolt centering.

For engines over 150 hp (0320, 0360, etc.) that use wood or composite props, we offer 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.

Our threaded 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, our 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.  Our 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.


Ext & Crush Plates
Crush plates, 8 x 7 Cozy Extension and 2" Rotex Extension
2.25 x 6 Constant Speed Extension w/ bolts, washers & o-ring

 

PROP EXTENSIONS 6" DIAMETER - 6" diameter on both ends
Standard lengths:    3"-- $378   4"-- $374    6"-- $525   8"-- $682
Note: For Cont 0-200, 5.5" dia. engine side is recommended; add $14.
For constant speed props add $50.

PROP EXTENSIONS 7" DIAMETER - 7" dia. prop end, 6" dia. engine end
Standard lengths:   4"x 7-- $453   6"x 7-- $642  8"x 7-- $830

CRUSH PLATES  -  6" dia. x 3/8" thick-- $55   7x3/8-- $67   7x1/2-- $77
Other thicknesses available.

SOLID SPACER $347 6-hole, $377 12-hole  -  6" dia. and 7" dia.

ENGINE REPLACEMENT LUGS  $168 per set of 6:   3/4-1/2   5/8-7/16  5/8-3/8

VISA, MASTERCARD and  Personal checks are gladly accepted.

 

Extensions
Saber Manufacturing Inc.
3601 Nassau Ct, Granbury, TX 76049
Ph: (817) 326-6293   Fax: (888) 817-6652
E-mail: Sabermfg@sabermfg.com
 
© 2017 Saber Mfg Inc