Miller Cam Handle Adjustment

It has been brought to the attention of KMDSI that there are two different methods of adjusting the rear adjustments to the Miller cam handles that are being taught in the industry today. The first is the original Miller method, adding shim washers between the adjustment nut and the mount ear on the helmet ring. Washers are added to just the right height, the slack is taken out with the adjustment screw; then the adjustment nut is tightened against the cam handle. This allows the adjustment screw to rotate or hinge in the mounting ear. This method can be difficult, time consuming, and if not properly done, can leave the cam handles feeling sloppy or very loose.

The second method, which we believe Ben Miller later adopted, and is the KMDSI standard, uses one washer between the adjustment nut and the mount ear on the helmet ring. Once the cam handles are properly adjusted using the adjustment screw, the adjustment nuts are tightened against the washer and mounting ear on the helmet ring. This solidly mounts all of the cam handle parts to the mounting ears on the helmet. It also prevents the adjustment screw from rotating or hinging in the mounting ears. Instead, the handles rotate or hinge on the adjustment screws themselves. The handle on one side is threading on, and the handle on the other side of it is threading off of the adjustment screws as the handles are operated. This is only a 1/4 to 1/2 turn, and is normal.