Description
Allen Engineering SP446: Power, Speed, and Precision Finishing
High-Torque Performance for Demanding Slabs
The SP446 from Allen Engineering is a professional-grade walk-behind concrete trowel designed to take on the toughest slab finishing challenges. With a balance of speed, torque, and operator-friendly control, the SP446 delivers the consistency contractors demand on large pours and detailed finishing zones. From heavy floating to final passes, this machine proves itself as a versatile concrete finishing machine built for productivity.
Reliable Honda Power with Torque Converter Control
At the core of the SP446 is the proven Honda GX390 engine, trusted by professionals for smooth performance, fuel efficiency, and long-term reliability. Paired with a variable torque converter clutch, the engine provides exceptional control over rotor speed. Operators can shift effortlessly between low-speed torque for floating and high-speed output for polished finishes. This flexibility makes the SP446 the right tool for commercial floors, industrial pads, or exterior slab work.
Gearbox Strength and Operator Comfort
The heavy-duty helical gearbox maximizes torque transfer while minimizing power loss, ensuring consistent finishing power across long shifts. This efficiency not only boosts productivity but also extends the life of the machine. The SP446 also features Allen’s redesigned plow handle system, offering ergonomic blade pitch control with an extended adjustment range of 28 to 30 degrees. With greater precision and reduced operator fatigue, crews can achieve uniform slab finishes with ease.
Rugged Design for Daily Jobsite Demands
Like all Allen trowels, the SP446 is built to last. Its reinforced steel frame and robust components withstand the daily wear and tear of demanding jobsite environments. Contractors can count on this concrete finishing machine to perform reliably pour after pour, making it a smart long-term investment for any fleet of professional finishing tools.
Why Choose the SP446?
- Honda GX390 engine delivers dependable performance and smooth power
- Torque converter clutch provides precision control of speed and torque
- Heavy-duty helical gearbox ensures durability and efficient output
- Ideal for commercial floors and large slabs as a powerful concrete trowel
- Built to perform consistently among Allen’s proven lineup of trowels
Finish Strong with the SP446
When speed, torque, and reliability matter, the SP446 delivers. It’s the walk-behind concrete trowel that gives professionals the power to finish faster, smoother, and stronger—every single time.
