AOS B235 4.0 HP 230 V 2 Speed Motor 3450 And 1725 RPM 56J Frame Through Bolt Threaded Shaft

Meet the B235 AOS Motor, a rugged 4.0 HP drive built for reliability and versatility. Designed around a 56J frame and through-bolt mounting, this 2-speed motor delivers the strongest punch when you need it and the finesse you require for precise operations. Whether you’re upgrading an older system or integrating a new drive, this motor is engineered to fit standard applications with ease.

Key specifications at a glance

• Horsepower: 4.0 HP
• Speed (high/low): 3450 RPM / 1725 RPM
• Voltage: 230 V
• Frame: 56J
• Shaft: Threaded
• Approx. shaft length (AG): 11-9/16"
• Connection diameter: 23
• Mounting: Through-bolt

Why a two-speed motor matters

The 2-speed (2Spd) design isn’t just a feature—it’s practical adaptability. Use the high-speed setting for fast cycling, quick index moves, or rapid material throughput. Switch to the low-speed setting when you need controlled torque, smoother starts, and precise positioning for drilling, milling, or conveying tasks. This flexibility can reduce gear swaps, minimize downtime, and extend the life of belts and drive components by matching speed to load.

Ideal for these scenarios

• Conveyor and material-handling systems that require both rapid movement and gentle feeding
• Small to mid-size machine tools where a single motor delivers multiple operating modes
• Industrial fans, saws, or grinders that benefit from a stable torque profile across speeds
• OEMs seeking a compact, reliable replacement motor with plug-and-play mounting

Installation and integration tips

• Confirm the 56J frame footprint aligns with your mounting space and that the through-bolt pattern matches your equipment.
• Pair a compatible speed control approach with the two-speed design so you can select high or low RPM safely during operation.
• Match the threaded shaft to a suitable coupling or hub; ensure proper alignment to prevent wear and reduce vibration.
• Verify the connection diameter and shaft specifications before wiring to avoid mismatch with existing motor dashboards or controllers.
• Plan for torque characteristics at each speed to optimize belts, pulleys, and driven components for longer service life.

With its robust construction, standard 56J frame, threaded shaft, and thru-bolt mounting, the B235 AOS Motor 56FR 4.0HP 2Spd 230V Thru Bolt is a dependable, adaptable choice for engineers and technicians who value performance, simplicity, and long-term reliability in a single package.