CAT CLASS: HQ-10091

1.5-2.25 in Concrete Vibrator

The 1.5–2.25 in concrete vibrator is the everyday workhorse for general concrete placement, sized for slabs, footings, and typical wall pours. It sits in the middle of the three-rung concrete vibrator ladder, between the Up to 1.5 in Concrete Vibrator for thin or congested work and the 2.25+ in Concrete Vibrator for deep structural elements. This band balances reach, consolidation power, and maneuverability across the widest range of residential and commercial applications.

Models

Brands

Cat classes

Pick a size class — capacity and reach differ across the range.

Key specifications

Specification	Typical range	What it means
Head Diameter	1.5–2 in (38.1–50.8 mm)	Sized to fit typical rebar spacing in walls, beams, and footings without jamming.
Power Source	Electric or gas engine	Electric models dominate interior and residential work; gas engines support remote pours.
Shaft Length	6–12 ft (1.8–3.7 m)	Determines reach into forms and depth of placement without repositioning.

How to choose

This size is the default choice for residential slabs, standard footings, and walls up to 12 inches thick, where rebar spacing and form dimensions match typical ACI 309 guidance. When working in heavily reinforced sections, thin tilt-up panels, or congested rebar cages, the Up to 1.5 in Concrete Vibrator offers better access and reduces the risk of honeycomb voids. For deep foundation pours, mass concrete placements, or structural elements exceeding 18 inches in thickness, the 2.25+ in Concrete Vibrator provides the radius of action and consolidation energy required to eliminate air pockets at depth.

What this size handles

Residential foundation slabs and garage floors
Commercial building footings and grade beams
Retaining walls and typical concrete walls up to 12 inches
Sidewalks, curbs, and flatwork with moderate rebar
Columns and beams with standard reinforcement spacing
Precast panel production and tilt-up wall casting

Safety & operation

Maintain three-point contact when operating from scaffolding or form edges; vibrator weight and torque affect balance
Avoid prolonged contact with rebar or formwork to prevent damage and reduce noise transmission
Limit insertion depth to prevent overvibration; ACI 309 recommends 6-inch penetration into the previous lift
Use hearing protection; gas-powered units and high-frequency electric models exceed 85 dBA at operator position

Transport & logistics

Electric models fit in a service van or pickup bed; typical weight under 50 lb for motor and head assembly
Gas-powered units may require a dedicated equipment trailer due to fuel and vibration isolation needs
Flexible shafts coil for compact storage; rigid shafts may extend beyond a standard truck bed

Power & supply

Electric models require 110V or 220V single-phase service; most run on standard 15A or 20A circuits
Gas engines operate on unleaded gasoline; some two-stroke models require premixed fuel
Cordless battery units in this size class are emerging, typically on 18V or higher lithium platforms

Frequently asked

What wall thickness does this size handle effectively?

This band consolidates walls from 6 to 12 inches thick with typical rebar spacing. Thinner walls risk formwork damage; thicker structural walls benefit from the radius of the 2.25+ in Concrete Vibrator.

How does head diameter relate to rebar spacing?

The head should pass freely between rebar with at least 1 inch of clearance. A 2-inch head suits #5 and #6 bar at standard spacing; tighter grids require the Up to 1.5 in Concrete Vibrator.

When is electric preferred over gas power?

Electric models dominate interior work, residential projects, and sites with accessible power due to lower noise, zero exhaust, and simpler starting. Gas engines support remote pours, large sites, and conditions where cords present a tripping or damage hazard.