by Domasky, TP/Pig
INSTRUCTIONS FOR BUILDING A FLEXBOARD
1. 1/2" x 16" x 48" sheet of plywood. (mounting
2. 13" section of 1 1/2" plastic pvc pipe. (shaft holder)
3. 1" x 1" L-bracket and 3" eye-bolt. (leveler)
4. 1/4" x 3" bolt, washers, and nut. (attaches shaft holder to plywood)
5. 2 wood screws to attach leveler to plywood.
6. 7 pound weight to hang from tip end of shaft.
7. 4 wood screws to attach plywood to shop wall.
8. 1/8 inch graph paper to use for graphing how much the club bends with
7 pounds of weight hanging from the tip end of the shaft.
1. Drill a 1/4" hole through plywood 2" down form
top left edge and 2" in from
top left corner. (This is where you will attach the shaft holder)
2. Drill the same 1/4" hole 1" in from the left edge
of the pvc shaft holder.
Use a 1/4" x 3" bolt to attach the pvc shaft holder to the plywood. Use
washers on both sides of the pvc shaft holder and then tighten with matching
3. Use a carpenters level to level the shaft holder horizontally
on the plywood.
Place the 1" x 1" L-bracket (leveler) 1 1/2 inches below the pvc shaft holder
and attach to the plywood with two wood screws 3" from the right edge of
the pvc shaft holder.
4. With the shaft holder level, measure 33" from the bolt
holding the shaft
holder to the plywood and make a pencil mark. Make a second pencil mark
46" from the bolt holding the shaft holder. (These pencil marks will indicate
where you place your 1/8" graph paper)
5. Attach graph paper(s) using a stapler between these pencil
marks. The top
edge of the paper should be flush/level with the bottom of the shaft holder.
6. Use 4 wood screws to attach plywood to shopwall studs.
How to use:
Place any finished driver measuring 43 1/2 " to 46 " into the shaft holder until the butt end comes to rest against the butt stop and the face of the club is facing the plywood. I am using a 45" driver in this example.
Adjust the leveling eye-bolt until the tip of the shaft is level with the top edge of the graph paper. Make a pencil mark on the graph paper to indicate the length of the club.
Hang your 7 pound weight from the hosel of the club. The shaft will bend from the extra weight just added. Make a second pencil mark on the graph paper to indicate the distance the head moved down on the graph paper.
Measure the distance between these two pencil marks.
According to "standards" using a 7 pound weight the club will bend the following distances:
Extra Stiff: 5 to 5 1/2 inches
Stiff: 5 3/4 to 6 1/4 inches
Regular: 6 1/2 to 7 inches
Flexible: 7 1/4 to 7 3/4 inches
Very Flex: 8 to 8 1/2 inches
The shorter the club, the less it will bend. The Shaft Deflection Board and GRAPH shown on page 50 of Golfworks 1998 catalog indicates the deflection based on a 7 pound weight at various lengths.
Return to Resource page