Makita HM1812X3 AVT Breaker Hammer w/ 1-1/8" Hex, 4pc Steel Set + Cart OB

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Item Number:MAKHM1812X3-P1
Stock Number:HM1812X3-P
Condition:New Other [*]
Availability:Out of Stock
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Makita HM1812X3 AVT Breaker Hammer w/ 1-1/8" Hex, 4pc Steel Set + Cart OB

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The HM1812X3 includes:

  • 1x Makita HM1812 AVT Breaker Hammer
  • 1x 783203-8 Hex Wrench
  • 1x T-02892 Premium Hammer Cart
  • 2x D-21369 1-1/8" X 20-1/2" Flat Chisel, 1-1/8" Hex
  • 2x B-45559 16" Self Sharpening Bull Point, 1-1/8" Hex


  • Hits Like Air Without the Vibration
  • Efficient 15 AMP motor with improved hammer mechanism delivers 53.9 ft.lbs./72.8 joules of impact energy to handle the most demanding applications
  • Advanced AVT is a synchronized, three-component system that more effectively reduces vibration in varying conditions resulting in a low 6.5m/s2
  • Advanced AVT provides a mechanical counterbalance system which greatly reduces vibration
  • Advanced AVT provides a vibration absorbing housing
  • Soft start suppresses start-up reaction for more control and better accuracy
  • No hammering when idling function automatically reduces the speed of the motor when not in use which helps increase tool life and performance

The new Makita HM1812 70 lb. AVT Breaker Hammer is engineered to hit like an air hammer, but with less noise and vibration. It has a powerful 15 AMP motor that delivers a full 53.9 ft.lbs. (73.8 Joules) of impact energy, so contractors get hard-hitting performance. Users also benefit from less noise and lower vibration than an air hammer and zero hassle with an air hose and compressor. The HM1812 features the latest Advanced AVT Technology, a synchronized three-component system that more effectively reduces vibration. The internal mechanical counterbalance system, vibration-absorbing housing and fixed movement handles are engineered for significantly less vibration during concrete breaking applications.

WARNING: California's Proposition 65

OP or Open Box?

These are Open Box items. All contents are brand new from the factory. The factory packaging may be damaged but otherwise these are brand new tools with brand new tool warranties.

"Open Box" Items originate for multiple reasons.

  • Sometimes during shipment from the manufacturer item packaging gets damaged but the contents are factory new
  • Sometimes in our own Distribution Center (DC) mis-handling occurs and damage to the packaging occurs. Especially in the cold months. Plastic wrapping gets cold, brittle and breaks away.
  • Within our DC, during "front line" replenishment from overstock locations, damage to packaging occurs and tags get pulled off.
  • Upon receipt of items into our distribution center, items are routinely opened to verify certain info to be the best they can at item web pages. For instance:
    • Contents of the package (What’s in the box)
    • Description of items and contents
    • Specifications of items and contents
    • Images of items and contents
  • Also in order to maintain the highest levels of service to you the customer, we do periodic random checks of items for all of the above.


  • Open box items are not necessarily always in a "box". They also include items that are wrapped, bagged, etc. and who's packing has been opened.
  • Open box items have limited quantities on hand and we can't guarantee their availability. We sell these items on a first come, first order basis.
  • Generally we have quantity on hand if you see an order button. But because of website limitations we are not able to update these item pages up to the minute. You will be notified as soon as we download your order if we do not have availability.


  • L.E.D. power light indicates switch failure or cord damage
  • L.E.D. service light notifies the user approximately 8 hours before brushes need to be replaced
  • Automatic brush cut-off protects commutator from damage for longer tool life
  • Cylindrical tool holder allows for the tool holder to be re-positioned should the original bolts and bolt holes become damaged
  • Recessed lifting handles provide more convenience
  • Breaker includes a 16.4 ft. power cord and integrated cord guide which positions the power cord away from working area

Tech Specs:

  • Brand: Makita
  • Model: HM1812X3
  • MPN: HM1812X3
  • UPC: 088381801799
  • Type: Breaker Hammer
  • Blows Per Minute : 870 BPM
  • Impact Energy (ft.lbs.) : 53.9 ft.lbs.
  • Impact Energy (Joules) : 72.8 J
  • Amperage: 15 amps
  • Voltage: 120 volts
  • Noise Level: 106 dB
  • Vibration (m/s²): 6.5
  • Bit Type: 1-1/8" Hex
  • Cord Length (ft): 16.4'
  • Overall Length: 33-1/4"
  • Net Weight : 69.1 lbs.
  • Shipping Weight : 72.6 lbs.
  • Package Qty.: 1

Makita HM1812X3 AVT Breaker Hammer w/ 1-1/8" Hex, 4pc Steel Set + Cart Product Video

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