Product Description:

The PMB33F-20216-01 brushless servomotor is built by Pacific Scientific and belongs to the PMB Brushless Servomotors series. It is intended for closed-loop axes where accurate position and consistent speed are essential. Working with a matched electronic drive, the unit delivers controlled torque across a wide speed range for indexing tables, pick-and-place heads, and light conveyor segments. Integrated digital feedback supplies commutation and position data so the controller can maintain synchronization even when load inertia or friction changes during a cycle.

As a frame designated NEMA Size 34, the motor uses the common 3.4-inch square mounting pattern, simplifying interchange on existing machinery. Its nominal stall draw is 11.0 ARMS at a 240 VAC bus, so drive current limits and thermal safeguards must accommodate that figure under locked-rotor conditions. Power and feedback exit through flying leads with MS connectors, an arrangement that streamlines installation while moving bulky plugs away from the shaft end. Rotor position is reported by a digital encoder with commutation, and the fine resolution of 4096 ppr supports smooth low-speed operation and precise incremental moves.

The output shaft includes a square key that transmits torque without relying solely on clamp force. A factory-installed shaft seal protects the front bearing against coolant splash and airborne dust, allowing the motor to operate in mildly contaminated environments. Magnetic length is established by a stack length multiple of 3, yielding higher torque density than shorter stacks while keeping inertial load moderate for rapid acceleration. Supplied as a PMB Series brushless servomotor, the unit integrates directly with Pacific Scientific drives that accept encoder feedback and provide the required 240-volt three-phase power.