Product Description:

The PMB33F-00114-03 is a brushless servomotor built by Pacific Scientific for motion axes that require precise speed and torque control. It belongs to the PMB Brushless Servomotors series and is intended to operate with digital servo drives in automated assembly cells, pick-and-place gantries, and packaging equipment. By converting electrical power into controlled rotary motion, the motor serves as the actuation element in closed-loop industrial automation systems. It is suited to equipment that needs repeatable rotary motion for indexing, transfer, and synchronized positioning tasks across multiple production cycles.

With a frame size of NEMA Size 34, the motor uses a standardized 3.4-inch square flange that supports consistent mounting in compatible machinery. Power and feedback connections are provided through flying leads with AMP connectors, which provide preterminated conductors for direct connection to matching control hardware. Inside the feedback section, a digital encoder with commutation supplies electrical phase information, and its resolution of 2048 ppr supports fine position and velocity feedback. The feedback arrangement also helps maintain stable commutation at low speed and during direction changes. During locked-rotor operation, the stator accepts 11.0 ARMS at 240 VAC, indicating the current demand the drive must support at stall. The output end uses a flat shaft, allowing the coupling to clamp onto a machined surface instead of using a keyed interface.

The customization code includes shaft seal and PTC thermistor. The shaft seal helps the motor operate in dusty environments, while the thermistor sends winding temperature information to the drive so protective shutdown can occur if heat rises too far. A stack length multiple of 3 increases the active iron length, which raises continuous torque compared with shorter stack options. The longer magnetic stack also adds inertia, so acceleration and deceleration behavior must be matched to the load and duty cycle of the axis.