Mech-tex manufacturing co supplies offers a 7.5&176; step angle stepper motor, model mts 7. Model mts 7 this is a 4-phase stepper motor. Two coils of motor with 2 windings each are enclosed in a 48 pole stator. The magnetic rotor has 24 poles and these magnetic motor runs in sintered bronze bearings. Specifications of magnetic motor include: step angle-7.5&176;; holding torque-600 gm cm; mounting dimension-66.7 mm; motor dimensional-f 55 mm x f 25.4 mm max; and, rated voltage- 6, 12. And 24 v.