Amazon.com: RTELLIGENT Nema 17 Stepper Motor, Bipolar Closed Loop 0.3NM(42.5oz.in) Stepping Motor with Encoder and 30cm Cable for Laser, CNC Kit : Industrial & Scientific
Nema 17 Closed Loop Stepper Motor 65Ncm/92oz.in Encoder 1000PPR(4000CPR) - 17HS24-2104D-E1000 STEPPERONLINE
Using Stepper Motor As Rotary Encoder - Instructables