Double-Loc FUTABA Servo Arm

All arms are Heavy duty Red Anodized Aluminum and tapping for 4/40

Half arms are measured form the servo screw hole to the outside hole.

Full arms are measured from the servo screw hole to the outside hole 2x, EXAMPLE 1-1/4" full arms measures 2-1/2" outside hole to outside hole. Futaba arms are for standard size output shafts.

Please note: Offset arms are for pull-pull and do not measure there designated length but are for that length rudder horn.

Don't forget the Pull-Pull Tensioners!!

SWB's servo arms should fit snug, and not just slip onto the output shaft. In fact they should go on a about a 1/3 of the way with light pressure and use the screw to pull them down the rest of the way. We do this because we are all after the tightest linkage and if there is any play in the spline fit it will only get worse. If need be, place a drop of light oil in the servo arm hole being very careful not to get any oil in the servo screw hole to help get the arm in place. Remember oil in the servo screw hole will not let the Loctite work properly. We suggest the arm's be installed outside the aircraft and on a stable flat surface.