 All of the APC RC Airplane Propellers
include a set of motor shaft adapter bushings, so that they can be used
on a variety of different RC airplane motor shafts. It is important to
use the correct adapter bushing so your propeller fits snugly on the
motor shaft.
Which Motor Shaft Adapter Bushing Do I Use?
To determine which adapter you should use you have to know the shaft
diameter the motor you're using. For example, if your motor has a
shaft diameter of 0.313in (7.95mm) then you need to use the APC adapter
bushing with an inside diameter of 0.313in.
Inside Diameters of the Motor Shaft Adapter Bushings
|
Bushing 1 |
Bushing 2 |
Bushing 3 |
Bushing 4 |
Bushing 5 |
| (mm) |
3.25 |
4.01 |
5.00 |
6.02 |
7.95 |
| (in) |
0.128 |
0.158 |
0.197 |
0.237 |
0.313 |
| (in) |
16/125 |
79/500 |
197/1000 |
237/1000 |
313/1000 |
* All the APC adapter bushings have the same outside diameter.
Precision Motor Shaft Mounting Procedure
- Each APC propeller's hub may be precisely adapted to motor
shaft diameters of 0.128in, 0.158in, 0.197in and 0.313in by using
bushings 1 through 5.
- Remove the desired locating ring by twisting.
- Insert the ring with draft angle as shown.
- The propeller hubs may be adapted to other shaft diameters by
reaming the non-precision 0.250in (1/4in, 6.35mm) hole to the size you
need.
Never Drill a Propeller, Use a Reamer Instead
In the instructions that come with each propeller,
APC tells customers to "drill to desired diameter". Never
drill a propeller. A drill will make an asymmetrical hole and ruin the
propeller's balance. A reamer will make a perfectly centered hole.
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