Bartell Morrison BC446 Walk Behind Trowel with GX390 Pro Pitch Handle HH Combo Blades

Description

Spinning four 46in blades under high-torque gas power, the Bartell Morrison BC446 Walk Behind Trowel commands broad commercial slab projects. An 11.7HP Honda GX390 engine turns the rotor through dense low-slump concrete mixes. Transporting this broad 265 lb unit demands crane or trailer loading, yet the Pro Pitch handle provides instantaneous blade attack adjustments.

A heavy aluminum gearbox encloses precision bronze worm gearing and high-capacity roller bearings in an enclosed oil bath. Powered by an overhead-valve Honda GX390 11.7HP engine, the drivetrain transfers torque through an industrial centrifugal clutch and cogged V-belt. Four ductile iron spider arms hold blades flat against torsional drag. Weighing 265 lbs unboxed, the machine maintains an active floor stance measuring 48in wide by 76in long with the handle attached.

Key Features of Bartell Morrison BC446

Commercial concrete contractors buy Bartell Morrison BC446 units to accelerate hard finishing on industrial floors. Check pricing to invest in this heavy-duty commercial 46in walk behind trowel with hoist hook and Pro Pitch handle.

• The Honda GX390 11.7HP engine produces continuous torque to break suction on wet concrete slabs.
• A 46in sweep diameter covers wide floor areas to seal surfaces before hydration sets.
• Pro Pitch lever mechanism adjusts blade attack angles in seconds using simple trigger action.
• Integrated hoist hook provides a secure balance point for jobsite crane and boom truck rigging.
• Four high-carbon steel combo blades handle both initial floating passes and hard finish burnishing.
• Ductile cast iron spider arms eliminate blade flutter and prevent slab surface chatter marks.
• Heavy tubular steel guard ring resists form impacts while offering clear operator sightlines.
• Centrifugal safety kill switch shuts down engine spark if the operator releases the handle.

Bench Diagnostics Rotor Runout Metrics

Spindle dial indicator sweeps confirm radial runout under 0.0003in TIR at the spider hub face under full rotation. Operating temperatures inside the heavy bronze gearbox settle at 144°F under continuous 65% engine load to protect oil seals. Blade speed ranges from 60 to 135 RPM, while sound levels measure 83 dB at the operator handle position. Spider arm deflection remains under 0.003in under 400 lbs of lateral drag. The drive belt maintains tension without slip across extended dyno tests.

Field Handling Maintenance Protocol

The Pro Pitch lever requires 6 lbs of trigger force to adjust blade attack, while lateral swings demand 13 lbs of handlebar input across wet paste. Do not select this heavy 46in unit for cut-up residential basements, split-level pads, or tight patio slabs.

• Drain engine oil and refill with 1.16 quarts of SAE 10W-30 every 100 operating hours.
• Grease four spider arm zerks with NLGI 2 lithium grease every 40 hours of active use.
• Inspect gearbox synthetic lubricant through the oil level check plug every 60 hours of operation.

Crate Manifest Warranty Protection

Bartell Morrison backs this trowel with a 1-Year commercial manufacturer warranty covering structural and drivetrain components. The unboxed shipping crate holds the BC446 power trowel base, Honda GX390 engine, Pro Pitch handle bar, four combination blades, hoist hook kit, spark plug wrench, warranty documentation, and an illustrated factory operations manual.