FMP1094 Ultimate Pushrod Measuring Tool. (Fits on calipers)
Ultimate pushrod measuring tool
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.
Ultimate Pushrod Measuring Tool