Schacht whorls allow the bobbin to turn at a particular speed in relation to the revolutions of the wheel’s drive band. This relationship is given as a spinning ratio. A slower (bigger) whorl will slow down the bobbin and produce a yarn with less twist; a faster (smaller) whorl will speed up the bobbin and produce a yarn with more twist. The whorls are interchangeable on Flatiron, Ladybug, Matchless and Sidekick wheels. 

Dimensions:

• Slow Speed: 4.25″ diameter at the widest point of the whorl
• Medium Speed: 3″ diameter at the widest point of the whorl
• Fast Speed: 2.25″ diameter at the widest point of the whorl
• High Speed: 1.875″ diameter at the widest point of the whorl
• Super High Speed: 1.875″ diameter at the widest point of the whorl