For joined turning (right side of Diagram 'B') mount the blanks in the same direction as above, using only the end bushings.
Use a disc or washer in between the two blanks to separate them.
Use 7mm spacer bushings to close the gaps on the shaft. Bring the tail stock with the live center snug against the mandrel
shaft hole, and lock in place. Tighten the lock nut (do not over tighten, it may damage the mandrel).
Turn the diameter of the wood down to 2'' to 2-1/4''. You may use any of the suggested profiles illustrated below, or one of
your own design. Make sure that both halves of the yo-yo match, so the weight is distributed equally on both halves. Finish
the yo-yo halves with sandpaper, polish and waxes of your choice.
NOTE:
Do not finish sand or polish the inside surfaces.
The surfaces should be left rough to allow for better breaking.
Diagram C / Suggested Turning Profiles
Diagram D / Assembly
Assembly
• Line up finished parts according to Diagram ‘D’.
• Press hub cap into the tube at the outer side of
each half.
• Press the inner hub into the tube at the
opposite side of each half.
• Insert the axle into either of the halves inner hub.
Thread to bottom.
• Insert the ball bearing over the axle.
• Thread on the opposite half over the axle to bottom.
• Loop string over axle. (See Diagram 'E').
• The yo-yo is ready to perform
NOTE:
A ball bearing yo-yo performs best with the
string in a double or triple loop or slip knot over the
axle (see Diagram 'E').
Hub
Cap
Brass
Tube
Axle
Inner
Hub
Ball
Bearing
Hub
Cap
Inner
Hub
Wood
Brass
Tube
5/8''
5/8''
String
Rough up surface
for better breakng
Rough up surface
for better breakng
DOUBLE LOOP
TRIPLE LOOP
SLIP KNOT
© 1998
PSI Woodworking Products,
9900 Global Rd., Philadelphia, PA 19115
Trouble Shooting
If the yo-yo “sleeps” too well and doesn’t return, or if
you cannot wind up the string, you have to improve
the “brake”. Rough-up or scratch a 1'' diameter area
on the inside surfaces of the yo-yo around the axle.
Diagram E / Stringing The Yo-Yo
Recessed
Aerodynamic
Butterfly
Standard