When only the best will do here is the killer tuning trick for all your mod motors,(especially handout 19-Turn Motors). Outstanding ABEC Grade 7 Ceramic motor bearings 1/8" x 3/8". If you want that last ounce of torque or extra point of power make the switch. Now available in two widths. Ever had a motor that you couldn't get the arm to center in the sweet spot of the magnetic field?? Well here is the answer just buy 1 standard thickness and one thin motor bearing and you will have the extra room to allow the armature to center in the magnetic field. $3.50 Each

Pick your thickness: 1/8 x 3/8 Thin (0.137")      or         1/8 x 3/8 Std (0.157")