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The characteristics of the bellows coupler can be modified by varying the number and spacing of convolutions. This type of coupler has high torsional stiffness and may be used in any drive system where high levels of torsional integrity are essential. Typical applications include encoder drives and closed loop servo systems.

	3-Convolution (standard) Short type for precisely aligned shafts open category
	9-Convolution (long, high-flex) Long Type for greater angular offsets or axial displacement open category
	2-Convolution (long cardan) Highest torsional stiffness of the bellows couplers giving the highest torsional accuracy open category