Denver Concrete Vibrator’s electric backpack moves the flex shaft motor up off of the ground and on to the users back.  Equipment life is extended because the motor is no longer being dragged through concrete and mud.  The lightweight and  comfortable backpack frame reduces user fatigue and  helps to increase production.

Features: 

• Lightweight fiberglass frame with multi-point adjustment straps for maximum comfort.
• Vented padding maximizes airflow to help keep the operator cool.
• The motor rotates a full 360 degrees allowing the user to place the vibrator in the most comfortable position.
• Available with an optional remote on/off switch that attaches to the flex shaft.  This allows the user to turn the motor on or off without taking off the backpack.
• All metal parts used on high-stress components.
• Flex shaft quick disconnect system comes as standard equipment.
• Convenient water bottle holder on the waist strap.
• A hinged mount allows the engine to pivot for added comfort.
• Weighs less than 25 pounds.

Learn how to properly use internal concrete vibrators here. (en español)

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Flex Shaft Head Performance Data

Model	Head Diameter	Head Length	Head Weight	Diameter of Effect*	Vibrations per Minute	Centrifugal Force	1/2 Wave Amplitude
D.81-6	13/16"	6"	1 lbs	3" to 7"	12,000	61 lbs	0.024"
D.81	13/16"	11"	1 lbs	5" to 11"	12,000	141 lbs	0.03"
D1.25	1.25"	8"	2 lbs	10" to 15"	12,000	178 lbs	0.035"
D1.5	1.5"	13"	5 lbs	12" to 18"	10,000	435 lbs	0.045"
D1.75	1.75"	15"	7 lbs	14" to 21"	10,000	830 lbs	0.05"
D2.0	2.0"	10"	6 lbs	16" to 24"	10,000	900 lbs	0.055"
D2.5	2.5"	10"	9 lbs	20" to 30"	10,000	1,260 lbs	0.055"
D2.75 Spud	2.75"	6"	7 lbs	14" to 21"	12,000	818 lbs	0.035"
D3.0	3.0"	12"	15 lbs	24" to 36"	10,000	1,676 lbs	0.039"

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

See also Gas Backpack and Electric Flex Shaft.

All Denver Concrete Vibrators come with a limited lifetime warranty against manufacturing defects.

The Denver Vibrator Flex Power 5 drive unit is designed to power our entire line of flex shaft style concrete vibrators.  This gas powered concrete vibrator will maintain a constant vibration speed regardless of shaft length or head size.  Extremely versatile, the Flex Power 5 is capable of driving a flex shaft vibrator up to 50 feet in length while using head sizes up to 2.5 inches in diameter.  Powered by a very reliable Honda 160cc engine coupled to a bullet-proof transmission featuring a twin belt drive; the Flex Power 5 gas concrete vibrator is engineered to perform even in the harshest conditions.

Our quick-release shaft disconnect comes standard.

No assembly required.  Just add gas and oil and start using.

Available with or without a wheel kit.

Specifications
Engine: 4-Cycle Honda 160cc
Tank Capacity: 0.81 Gallons (3 L)
Run Time Full Throttle: 2.2 hours
Engine Oil Capacity: 0.63 Quart (0.6 L)
Dry Weight: 80 lbs. (36 Kg)
Frame Dimensions: 21” x 21” x 21” (53 cm x 53 cm x 53 cm)
Vibrating Head Speed: 12,000 vpm
Maximum Shaft Length: 50 Feet (15 M)

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Flex Shaft Head Performance Data

Model	Head Diameter	Head Length	Head Weight	Diameter of Effect*	Vibrations per Minute	Centrifugal Force	1/2 Wave Amplitude
D.81-6	13/16"	6"	1 lbs	3" to 7"	12,000	61 lbs	0.024"
D.81	13/16"	11"	1 lbs	5" to 11"	12,000	141 lbs	0.03"
D1.25	1.25"	8"	2 lbs	10" to 15"	12,000	178 lbs	0.035"
D1.5	1.5"	13"	5 lbs	12" to 18"	10,000	435 lbs	0.045"
D1.75	1.75"	15"	7 lbs	14" to 21"	10,000	830 lbs	0.05"
D2.0	2.0"	10"	6 lbs	16" to 24"	10,000	900 lbs	0.055"
D2.5	2.5"	10"	9 lbs	20" to 30"	10,000	1,260 lbs	0.055"
D2.75 Spud	2.75"	6"	7 lbs	14" to 21"	12,000	818 lbs	0.035"
D3.0	3.0"	12"	15 lbs	24" to 36"	10,000	1,676 lbs	0.039"

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

See also Honda Backpack and Electric Flex Shaft.

All Denver Concrete Vibrators come with a limited lifetime warranty against manufacturing defects.