Ultimate pushrod measuring tool FMP1094
Congratulation! You have just purchased the Ultimate in pushrod measuring tools. Now only will this tool allow
you to measure the length of the pushrod, but you can record its length for future duplication. This is extremely
useful when setting up two or more heli’s of the same type or when re-building a heli after a crash. Also, this
tool will allow you to build two identical pushrods at the same time. In addition this is the only tool that allows
you to measure the distance between the link balls or pivot points and makes pushrods this same length. This
is accomplished without changing anything on the tool insuring that all pushrods are the proper length and all
controls are in the proper position.
NOTE: This tool is used with a set of machinist calipers (not supplied), digital (recommended) or dial. A set of
machinist calipers is a very precise tool and when used with the Ultimate ball link measuring tool, adds to their
usefulness. Proper care and handling of both will greatly extend their useful life and precision. We have tested
the Ultimate pushrod measuring tool on several sets of calipers. Calipers are available from any machinist
supply store. We have found them ranging from $20.00 and up.
1-Carefully thread the 4 ea M3x3 set screw in the 4 ea M3 attachment holes on each piece of the Ultimate
Pushrod Measuring Tool. Be careful that the set screws do not extend beyond the inner surface of the Ultimate
pushrod measuring tool. Repeat for the other piece of the Ultimate Pushrod Measuring Tool.
2-Thread the two M3x8 set screws in M3 tapped holes on the front of the Ultimate Pushrod Measuring Tool. At
this point the set screws can be secured with blue Loctite. Make sure each one is centered and they should
lightly bottom out on each other. Another option is to use a M3 socket head screw (not supplied) in place of the
M3x8 set screw. If using the M3 socket head screw, make sure it is lightly tightened when taking
measurements. This will prevent the thread clearance between the screw and the hole from adding erroneous
readings when measuring the pushrod length.
3-Slide one piece of the Ultimate Pushrod Measuring Tool on to each blade of the machinist caliper. Close the
calipers until the two pieces of the Ultimate Pushrod Measuring Tool touch. Lightly tighten the attaching M3x3
set screws until they touch the face of the caliper blades. Sighting from the end, the M3x8 set screws should
appear parallel to each other. If not, the Ultimate Pushrod Measuring Tool pieces can be re-positioned by
loosening the top set screws and tightening the bottom or vise versa, as necessary. Double check that the two
pieces of the Ultimate Pushrod Measuring Tool are still touching along their length and tighten M3x3 set
screws but being careful not to over tighten and strip threads.
4-The Ultimate Pushrod Measuring Tool can be used in many ways. Its first feature is that is can be used to
measure the distance between two link balls or two pivot points. This will give the actual length the pushrod
should be. This length is automatically duplicated by the two sets of M3x8 set screws that extend above and
below the Ultimate Pushrod Measuring Tool pieces and the tapped M2 holes on the same center line. (If using
the M2 holes with M2 screws (not supplied), the M3x8 set screws will have to be removed.) Sometimes the
pushrod length cannot be matched to this length due to the ball link type used. It is best to use ball links that
are ½ turn adjustable such as FMP Ultra Links. The pushrod can now be built to match this length without any
additional tools or changing any setting on the Ultimate Pushrod Measuring Tool.
The Ultimate Pushrod Measuring Tool can also be used to duplicate pushrod lengths when making more than
one pushrod that is common in push/pull control systems, duplicating pushrods for each side of the rotor head.
The Ultimate Pushrod Measuring Tool can also be used to measure or duplicate the pushrod length with the
ball link balls installed or without. Use the tapered section on the from of each Ultimate Pushrod measuring
Tool to measure and/or duplicate the pushrod without the ball link balls installed. Use the extended M3x8 set
screws or use m3 socket head screws (not supplied) to measure/duplicate pushrods with a 3mm id link ball
installed. Use the M2 tapped hole and a M2 socket head screws (not supplied) to measure/duplicate pushrods
with a 2mm id ball link ball installed.