Crankfire Systems ^TM

Welcome to Emory Jones Crankfire Systems ^TM

Original Manuals and Tutorials

ORIGINAL CRANKFIRE INSTALLATION AND OPERATION PAGE 2

Preparation of the gun and the gunner:

The change from straight semi auto operation to crank fire mode requires your gun to function at it’s very best. Headspace has possibly the greatest effect on the Rate of Fire capability. Check it and make sure that it is right. If the gun runs sluggishly the first place to look is at changing the headspace slightly. A click or two can make a tremendous difference.

The semi auto triggers most commonly used in these guns, seem to suffer from reset problems frequently. The most common cure seems to be removal of .020" to .040" of material from the underside of the trigger where it contacts the bottom plate. A good trigger return spring is also required for proper operation.

The 1919 likes lots of lubrication, especially at 470RPM, so don’t spare the lube on the internals. And by the way that is on "clean" internals, when you start running ammo thru it at these rates the powder residue etc. builds up in a hurry.

The booster becomes a very important item also. You will have to remove the built up carbon at much shorter intervals, and the right diameter orifice is MANDATORY.

If the booster orifice is too large the gun WILL run like a slug, and the Crankfire becomes a pointless exercise.

The numbers, as near as I have been able to determine, are:

.308-.531" 30.06-.721" 8MM-.6875"

A word about the M6 Flashider; Many people report that their semi auto guns function with these, even though the orifice is .721" for 30.06. In testing I could not get any of the crank fired guns to run with them. After I bushed them down to .531" they worked fine. As a service to those who want to use the M6 with the Crankfire, I will modify a customer-supplied flashider for $50.00. For those that can do it or have it done locally, I will be happy to tell you how mine are done.

Now for the Gunner; The most important thing here is the crank speed and the smoothness of rotation. "Everybody including me", when first firing one of these guns, instinctively wants to crank it really fast. On my AR/AK four lobe guns I have never been able to out run the guns with the crank. BUT, the 1919 semi with the six-lobe cam is a wholly different proposition. Once you exceed the 77/78 revolutions per minute on the crank the gun can’t keep up and will start to "skip", and the faster you crank it the worse it gets. So PLEASE DO THIS FIRST, go to momma’s microwave and put 60 seconds on the timer. Hold the Crankfire unit so that you can crank it, start the timer and without watching the clock, begin cranking the unit while counting the number of revolutions. When the timer goes off you’ll be amazed at how much faster you’re cranking it than is required. It will take a little practice, but what you want is Smooth, Steady and No Warp Drive rotation.

Legal Notice "All Crankfire Systems Gatling type Secondary Fire Control units, components and design features are covered by U.S. Patent #7,103,999 B2.  Other Patents Pending."

Last Update: Jun 2008