Abstract: A generally cylindrical armature for a linear motor includes an outer diameter region of involute laminate construction. Restricting the laminate assembly to an outer diameter region of the armature, which region constitutes a high magnetic flux density region, minimizes an arc of involute .alpha.. Minimizing the arc of involute .alpha. approximates more closely a true radial disposition of the involute laminations, thereby increasing the ability of the laminations to reduce eddy current losses, therein providing the basis for a more efficient linear motor.