Product Description:

The PMB33C-00201-00 is a brushless servo motor manufactured by Pacific Scientific and supplied within the PMB Brushless Servomotors series. As a rotary actuator in industrial automation, it converts drive current from a matched amplifier into controlled torque and speed for indexing tables, pick-and-place heads, and packaging machinery axes. Electronic commutation eliminates brush maintenance, reduces wear at the commutator, and supports the rapid cycling needed in automated production equipment. That makes the motor well suited for repetitive start-stop motion where consistent response and low routine maintenance are important.

Power is delivered through flying leads terminated in MS connectors, which helps when cables must pass through conduit or tight machine spaces before final connection. The motor uses a NEMA Size 34 frame, giving it a standard mounting face that fits many common brackets and gearbox inputs. With a supply of 240 VAC, the windings draw a nominal stall current of 3.8 ARMS, so the matching drive must provide that phase current under locked-rotor conditions at rated temperature. Rotor position is detected by Hall sensors that provide commutation signals for trapezoidal drive control without requiring a separate encoder. Because commutation is derived directly from these feedback signals, the amplifier can switch phase current at the proper rotor angle during acceleration and reversal.

The shaft includes a flat, which allows set-screw couplings to grip the output securely during reversing motion. The shaft geometry also simplifies alignment with pulleys or couplings that rely on a positive clamping point rather than a keyed interface. The unit is supplied as a standard motor, so it follows the baseline winding, bearing, and sealing arrangement used for this model family. A stack length multiple of 3 increases the active iron length within this frame, which helps raise continuous torque capability. The added magnetic length supports torque production without increasing the mounting face size, which can help when machine envelopes are already fixed.