Looking for a tool to measure your yarn? You're going to love this one! Just use the ultra clamp to secure the yarn meter between your swift and ball winder, send the yarn through the yarn guide, around the yarn measurement wheel & out the other yarn guide. We make these things here in our Cincinnati workshop using quality UpGreen Counters, German IGUS bearings, ABS gears & a solid hard maple block with a plywood shroud to prevent the gears from getting damaged.
Accuracy: The diameter of this yarn measurement wheel 1.91" +/-0.005" in diameter, which equals about 6" in circumference. The gears have a 6:1 ratio, so six revolutions of the yarn measurement wheel is 1 actuation of the counter.