NovoSphere Nema34 Stepper Motor Kit vs NovoSphere Nema 34 Closed Stepper Kit

Buy the B kit if you need torque and reliability on a CNC or router: its closed-loop encoder and 8.5 N.m holding torque beat the A kit's open-loop 4.6 N.m, and owners of closed-loop Nema 34 setups report fewer lost steps and stalls. Buy the A kit only if you have a proven open-loop design, a driver that suits the DMA860H, and no need for position feedback. Both are NovoSphere-branded kits with 1.8° step angle and 2-phase hybrid motors, so build quality is comparable; the real difference is feedback and torque.

• Choose the Nema34 4.6N.m kit if your machine is already tuned for open-loop control and 4.6 N.m is enough for its load.
• Choose the Nema 34 closed-loop kit if you want encoder feedback, more torque, and fewer lost steps under load.