Baldor Motor 36N231S109G1 Motor

The Baldor Motor 36N231S109G1 is a 3 HP, 1760 RPM, three-phase general purpose motor built on the 182TZ frame and rated 230/460 V, 60 Hz. Baldor-Reliance lists it as a 3628M motor with NEMA Design B torque characteristics, Class F insulation, a 1.15 service factor and 40°C ambient continuous duty. The nameplate shows 8.2 A at 230 V and 4.1 A at 460 V, a NEMA nominal efficiency of 89.5%, a power factor of 77 and KVA code K. As a four-pole motor on 60 Hz power it has a synchronous speed of 1800 RPM and runs at about 1760 RPM under load, which is the usual speed for belt-driven fans, blowers and pumps on commercial HVAC and process equipment.

Mechanical and electrical details. The shaft is 0.875 inch in diameter with the extension at the pulley end, and the motor has reversible rotation and F1 mounting on a standard NEMA foot base. It carries ball bearings — 6206 at the drive end and 6205 at the opposite end — packed with Polyrex EM grease rated -20°F to 300°F. Winding protection is a built-in automatic-reset thermal overload, and the motor comes with 12 flying leads of 16 AWG brought out through a knockout (Ko) box, so it can be connected for either 230 V or 460 V operation per the nameplate wiring diagram. The enclosure carries the OPSB designation, there is no drip cover, and Baldor lists the motor for direct-on-line starting and as inverter ready, with CSA and UR agency approvals.

Selecting and installing. This is a Baldor spec-number motor, so the number printed on the nameplate (36N231S109G1) is the quickest way to confirm a match. Check horsepower, speed, frame designation (182TZ), voltage and shaft size against the motor you are replacing — frame suffix letters matter because they describe the shaft and mounting. Its sister motor 36Q758S109G1 is the same 3 HP, 1760 RPM, 182TZ design with a 208-230/460 V nameplate, so choose by your supply voltage. Lock out and tag out power before swapping, verify rotation with the load uncoupled, set overload protection from the nameplate amps, and align the sheave and set belt tension to the drive manufacturer's specification, since over-tight belts are a leading cause of early bearing failure.

Key Benefits

• Exact Baldor Spec Match: Built and specified by Baldor-Reliance as 36N231S109G1, not a generic cross-fit 182TZ motor.
• Dual-Voltage Flexibility: Connects for 230 V (8.2 A) or 460 V (4.1 A) three-phase power through 12 flying leads.
• Built-In Winding Protection: An automatic-reset thermal overload, Class F insulation and a 1.15 service factor give margin on demanding duty.
• Serviceable Bearings: 6206/6205 ball bearings with Polyrex EM grease are common, easy-to-source sizes for long-term maintenance.

Common Questions

• What voltage and amperage is this motor? 230/460 V, three-phase, 60 Hz, drawing 8.2 A at 230 V and 4.1 A at 460 V per the Baldor nameplate.
• Can the rotation be reversed? Yes. Baldor lists the shaft rotation as reversible; swap any two of the three supply leads to change direction.
• How is it different from the 36Q758S109G1? Both are 3 HP, 1760 RPM, 182TZ motors. The 36Q758S109G1 nameplate reads 208-230/460 V, while the 36N231S109G1 reads 230/460 V.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.