900 RPM Electric Motors (8-Pole Industrial Motors)
900 RPM electric motors deliver maximum torque at minimal speed, making them ideal for heavy-duty applications that require steady, controlled power delivery.
Running at eight poles (60 Hz), these low-speed motors operate quietly, extend mechanical life, and eliminate the need for large gear reductions in torque-driven equipment.
Built to NEMA Premium® efficiency standards and available in ODP, TEFC, and Explosion-Proof (TEXP) enclosures, 900 RPM motors are engineered for reliability in continuous, high-load industrial operations.
Performance and Design Overview
A 900 RPM (8-pole) motor provides a unique combination of slow rotational speed and high starting torque, perfect for equipment where load inertia is high and torque output must remain constant.
These motors are precision-balanced for low vibration and feature reinforced bearings to handle continuous torque delivery.
✅ Key Advantages
Delivers maximum torque at low speed
Reduces need for external gearing or belt reduction
Quiet, stable operation with minimal vibration
Premium efficiency design reduces energy loss
Built for long-term continuous duty under heavy load
Enclosure Options
Frame materials include cast iron, stainless steel, and fabricated steel, selected based on the application environment.
Typical Specifications (900 RPM Motors)
Specification Typical Range / Option
Speed (RPM) 900 (8-Pole, 60 Hz)
Horsepower Range 7.5 – 200 HP
Frame Sizes 254T – 449T
Voltage Options 208 / 230 / 460 / 575 V (3-Phase)
Frequency 60 Hz
Efficiency NEMA Premium® / IE3
Enclosures ODP, TEFC, TEXP
Mountings Foot, C-Face, D-Flange, Vertical
Service Factor 1.15 (Standard)
All motors are dynamically balanced and undergo vibration, insulation, and thermal testing for continuous-duty certification.
Common Applications for 900 RPM Motors
Crushers and grinders
Heavy mixers and agitators
Large conveyors and augers
Rotary kilns and slow-turning drums
Process drives in mills and refineries
Industrial pumping systems requiring high torque at low speed
These motors provide steady torque delivery with minimal wear, making them ideal for operations that cannot afford mechanical stress or downtime.
Construction & Frame Options
Cast Iron – Superior rigidity and vibration damping.
Stainless Steel – Corrosion-resistant for washdown or chemical settings.
Fabricated Steel – Lighter, customizable design for OEM integration.
Each frame is machined to ensure alignment accuracy, load stability, and extended component lifespan.
Mounting and Voltage Options
Mounting Styles: Foot, C-Face, D-Flange, Vertical Mount, or Footless Rigid Base.
Voltage Options: 208 V, 230 V, 460 V, 575 V (3-Phase), with dual-rated 230/460 models.
All 900 RPM motors are VFD and soft-starter compatible, allowing precise torque and speed control under variable load conditions.
Request a Quote or Spec Sheet
Looking for a 900 RPM electric motor for a torque-driven or low-speed process?
Our specialists can specify the right model based on frame size, enclosure, horsepower, and application environment.
Request a Quote or Request Spec Sheet to receive detailed specs, availability, and lead times from leading manufacturers including Brook Crompton, US Electric, and Worldwide Electric.