{"product_id":"northrock-pro-3-25l3-electric-concrete-consolidator-motor-3hp","title":"Northrock PRO 3+ (25L3 \/ 25L3QD) — 3 HP Electric Concrete Consolidator Motor, 115V 19A","description":"\u003ch2\u003eNorthrock PRO 3+ Electric Concrete Consolidator Motor — 3 HP, 115V, 19 Amp\u003c\/h2\u003e\n\n\u003cp\u003eThe Northrock \u003cstrong\u003ePRO 3+\u003c\/strong\u003e (model \u003cstrong\u003e25L3\u003c\/strong\u003e, or \u003cstrong\u003e25L3QD\u003c\/strong\u003e with quick-disconnect) is Northrock's heavy-duty electric concrete consolidator motor — the \u003cstrong\u003e3 HP workhorse\u003c\/strong\u003e built for the busy contractor and tough rental applications where a 1.5 HP or 2 HP motor would bog down under load. The 3 HP universal motor drives the full Northrock head range up to \u003cstrong\u003e2-1\/2\" diameter\u003c\/strong\u003e and is the correct choice for \u003cstrong\u003ecolumn vibration, slab consolidation, footings and forms, structural walls, precast production, and low-slump concrete mixes\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eManufactured in Bohemia, NY. \u003cstrong\u003eUL \/ cUL Listed.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhen you need the PRO 3+ instead of the PRO 2+\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow-slump mixes\u003c\/strong\u003e — stiff concrete draws more amperage through the shaft. The 3 HP motor holds rated frequency (~10,000 VPM) where a 2 HP motor sags under load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecast production\u003c\/strong\u003e — continuous multi-hour cycles with short cool-down windows.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong shaft runs\u003c\/strong\u003e — 21 ft single shafts or two connected shafts up to 60 ft. Longer shafts consume more driveline power; the PRO 3+ carries it without bogging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2\" and 2-1\/2\" head work\u003c\/strong\u003e — large-diameter heads displace more concrete per revolution and demand more torque to stay at the target 10,000 VPM under load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRental fleets\u003c\/strong\u003e — the PRO 3+ is the model renters reach for when a 20 A circuit is available and the job is bigger than residential.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColumn and wall pours\u003c\/strong\u003e — enough torque to work a 2-1\/2\" head through rebar-congested columns without stalling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHeavy-duty construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpgraded armature, field coil, and end bell\u003c\/strong\u003e versus the PRO 2+ — parts \u003cstrong\u003e475C1\u003c\/strong\u003e (armature), \u003cstrong\u003e480C1\u003c\/strong\u003e (field), and \u003cstrong\u003e420D1\u003c\/strong\u003e (end bell) are unique to the 25L3 build and rated for the higher amp draw.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarger air filter and baffle assembly\u003c\/strong\u003e (\u003cstrong\u003e470B1\u003c\/strong\u003e \/ \u003cstrong\u003e470F1\u003c\/strong\u003e) — more cooling airflow for continuous-duty operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavier-gauge power cord\u003c\/strong\u003e (\u003cstrong\u003e505J1\u003c\/strong\u003e) — carries the 20 A plug required for the higher amp draw.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-strength cast aluminum housing\u003c\/strong\u003e — full-perimeter heat sink that dissipates damaging heat on long pours.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged shock-absorbing frame\u003c\/strong\u003e — doubles as a carry handle and shields the rocker switch from drops and impact.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWatertight, strain-relief cord entry\u003c\/strong\u003e — the #1 preventable jobsite failure is a pulled or flooded power cord; the PRO 3+ is built to stop it.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtected rocker switch\u003c\/strong\u003e — water-resistant seal and frame protection against side impact.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully field-serviceable\u003c\/strong\u003e — brushes, bearings, armature, field coil, switch, cord, and frame are all individually replaceable OEM parts, all stocked at DanseUSA.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional shoulder strap\u003c\/strong\u003e available for single-operator long-pour comfort.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e PRO 3+ (25L3 standard \/ 25L3QD quick-disconnect)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e 3 HP, single-phase, universal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 115V, 60 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmp draw:\u003c\/strong\u003e 19 A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet requirement:\u003c\/strong\u003e 20 A circuit with NEMA 5-20R T-slot receptacle — will not run on a standard 15 A household outlet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerator requirement:\u003c\/strong\u003e 2,500+ running watts with 20 A outlet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax vibrator head diameter:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax flexible shaft length:\u003c\/strong\u003e up to 60 ft with connector\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTarget vibration frequency:\u003c\/strong\u003e ~10,000 VPM under load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL \/ cUL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA — Bohemia, NY\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e25L3 standard vs. 25L3QD quick-disconnect\u003c\/h3\u003e\n\u003cp\u003eBoth motors are mechanically identical 3 HP power units. The difference is the shaft coupling:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25L3 (standard)\u003c\/strong\u003e — permanent threaded shaft connection using core adapter \u003cstrong\u003e160AH1\u003c\/strong\u003e and casing adapter \u003cstrong\u003e150DW1\u003c\/strong\u003e. Choose this for crews that rarely swap shaft lengths.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25L3QD (quick-disconnect)\u003c\/strong\u003e — tool-free quick-release coupling using core adapter \u003cstrong\u003e160CW1\u003c\/strong\u003e and casing adapter \u003cstrong\u003e150DE1\u003c\/strong\u003e. Choose this for rental fleets and multi-head jobs where crews swap shaft lengths or head sizes in the middle of a pour.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible shafts and heads\u003c\/h3\u003e\n\n\u003cp\u003eThe PRO 3+ drives Northrock flexible shafts and vibrator heads across the \u003cstrong\u003efull range — seven head sizes from 3\/4\" through 2-1\/2\"\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eShaft lengths (single):\u003c\/strong\u003e 2 ft, 5 ft, 7 ft, 10 ft, 12 ft, 14 ft, 16 ft, 21 ft. \u003cstrong\u003eMaximum reach with connector:\u003c\/strong\u003e up to 60 ft.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eShaft types:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard-duty shaft\u003c\/strong\u003e — stiffer construction for better poking ability and control in open pours.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePencil shaft\u003c\/strong\u003e — more flexible, designed for tight, rebar-congested areas (used with 3\/4\" and 1-1\/4\" heads).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuick-disconnect shafts for the 25L3QD\u003c\/strong\u003e — recommended compatible shafts include the \u003cstrong\u003e25N7 (7 ft)\u003c\/strong\u003e and \u003cstrong\u003e25N14 (14 ft)\u003c\/strong\u003e QD-compatible assemblies. QD shafts feature rubber-coated steel braiding to resist stretching and a hardened steel inner liner that serves as the bearing surface for the greased core. Each assembly includes both the shaft casing and a pre-greased core.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNorthrock vibrator heads (maintenance-free):\u003c\/strong\u003e All seven Northrock heads (3\/4\", 1\", 1-1\/4\", 1-1\/2\", 1-3\/4\", 2\", 2-1\/2\") are factory-sealed with \u003cstrong\u003efour high-performance lifetime ball bearings, an oil-bath lubrication system with permanent seal\u003c\/strong\u003e, alloy steel housing, and a scientifically-designed eccentric that maximizes amplitude. The permanent seal keeps oil in and contaminants out — no field maintenance required. Replace the entire head when the bearings eventually fail.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMulti-brand compatible\u003c\/strong\u003e — the PRO 3+ is adapter-ready for existing shafts and heads from Wacker Neuson (M1000 \/ M2000 \/ M3000), Wyco (990 \/ 991 \/ 992 \/ 993 series), Oztec (1.2 \/ 1.8 \/ 2.4 \/ 3.2), Stow, Stone, Multiquip \/ Mikasa (PMA series), Dynapac, Viber, Master, Denver, Dreyer, and Remington with the correct core and casing adapter pair.\u003c\/p\u003e\n\n\u003ch3\u003eBest applications\u003c\/h3\u003e\n\u003cp\u003ePrecast concrete plants, bridge deck and pier pours, retaining walls, heavily reinforced columns, large commercial footings, tilt-up panels, stiff low-slump structural mixes, ICF wall fill, mass pours, and any production environment where a vibrator runs continuously for most of the shift. The PRO 3+ is also the standard rental-fleet choice for contractors who rent by the week for big-job consolidation work.\u003c\/p\u003e\n\n\u003ch3\u003eElectrical setup and extension cord sizing\u003c\/h3\u003e\n\u003cp\u003eBecause the PRO 3+ pulls 19 A, it must be run from a \u003cstrong\u003ededicated 20 A circuit\u003c\/strong\u003e with a 20 A T-slot receptacle (NEMA 5-20R) or a generator rated above 2,500 running watts with a 20 A outlet. Running the PRO 3+ through an undersized extension cord is the fastest way to burn the motor — voltage drop forces the motor to draw more current to maintain RPM, which cooks brushes, armature windings, and the field coil.\u003c\/p\u003e\n\n\u003cp\u003eUse these cord sizes, straight from the Northrock manual:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0–25 ft: \u003cstrong\u003e12 AWG\u003c\/strong\u003e minimum\u003c\/li\u003e\n  \u003cli\u003e26–50 ft: \u003cstrong\u003e10 AWG\u003c\/strong\u003e minimum\u003c\/li\u003e\n  \u003cli\u003e51–100 ft: Not recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOutdoor cords must be marked with the suffix \u003cstrong\u003eW-A\u003c\/strong\u003e (e.g. SOW-A), 3-conductor grounded. Use a GFCI in damp or wet jobsite conditions. \u003cstrong\u003eNever run the PRO 3+ on 14 AWG cord\u003c\/strong\u003e regardless of length.\u003c\/p\u003e\n\n\u003ch3\u003eChoosing PRO 3+ vs. PRO 1.5+ vs. PRO 2+\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePRO 1.5+ (25L1)\u003c\/strong\u003e — 1.5 HP \/ 13 A. Tops out at 1-1\/2\" heads. Residential slabs, footings, light commercial. Runs on any 15 A household outlet.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePRO 2+ (25L2)\u003c\/strong\u003e — 2 HP \/ 15 A. Full Northrock head range (3\/4\"–2-1\/2\"). General construction, rental fleets, mixed daily work. Runs on standard 15 A \/ 20 A circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePRO 3+ (25L3)\u003c\/strong\u003e — 3 HP \/ 19 A. Full head range. Heavy-duty, precast, low-slump, continuous-duty, long shaft runs. \u003cstrong\u003eRequires a 20 A circuit.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cp\u003eMotor \/ power unit only. \u003cstrong\u003eFlexible shafts and vibrator heads are sold separately\u003c\/strong\u003e so you can configure the exact shaft length, shaft type (standard-duty vs. pencil), and head diameter for your pour. Browse compatible Northrock shafts and heads in our related-products section, or call us and we'll spec the right combination for your application.\u003c\/p\u003e\n\n\u003ch3\u003eWhy buy the PRO 3+ from DanseUSA\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuthorized Northrock dealer\u003c\/strong\u003e — genuine OEM motor with full factory warranty.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete 25L3 parts backup in stock\u003c\/strong\u003e — including the 25L3-specific armature (475C1), field coil (480C1), end bell (420D1), motor housing (105AG1), frame assembly (440D1), heavy-gauge cord (505J1), and larger air filter (470B1) that the smaller motors don't share.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame-day shipping\u003c\/strong\u003e on in-stock orders placed before 12 PM ET.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel-specific compatibility support\u003c\/strong\u003e — if you're adapting the PRO 3+ to run existing non-Northrock shafts or heads, email your shaft brand and model to \u003ca href=\"mailto:customerservice@danseusa.com\"\u003ecustomerservice@danseusa.com\u003c\/a\u003e and we'll confirm the right core adapter and casing adapter before you buy.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-brand expertise\u003c\/strong\u003e — we carry Northrock, Wacker, Wyco, Oztec, Multiquip, Stone, and other major concrete vibrator brands, so we can cross-reference parts across your entire fleet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about fit or the right motor for your pour? Call \u003cstrong\u003e+1 (202) 630-1027\u003c\/strong\u003e or email \u003ca href=\"mailto:customerservice@danseusa.com\"\u003ecustomerservice@danseusa.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"NORTHROCK","offers":[{"title":"Default Title","offer_id":47708536471778,"sku":null,"price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0728\/0204\/2082\/files\/NorthrockPo3_ConcreteVibrator.png?v=1776614623","url":"https:\/\/www.danseusa.com\/products\/northrock-pro-3-25l3-electric-concrete-consolidator-motor-3hp","provider":"Danse USA","version":"1.0","type":"link"}