42 lb. AVT® Demolition Hammer, accepts 1‑1/8" Hex bits

42 lb. AVT® Demolition Hammer, accepts 1‑1/8" Hex bits

  • POWER : 14 AMP motor to tackle demanding jobs
  • INNOVATION : AVT® internal counter balance, greatly reduces vibration, directs more impact energy to work surface
  • DURABILITY : Extended service life of brushes for less downtime
  • PERFORMANCE : Variable speed control dial for greater versatility
  • INCLUDES : Bull point and tool case with wheels

About Model

Makita’s hard-hitting HM1317CB 42 lb. Breaker Hammer is engineered for heavy chipping, demolition and breaking applications, but with less vibration for increased user comfort. The HM1317CB is equipped with Anti-Vibration Technology (AVT®), an internal counterbalance system that is engineered into the tool for more effective vibration reduction. It is an ideal solution for heavy structural demolition like breaking up driveways and sidewalks, as well as for landscape and trenchwork, asphalt removal, driving ground rods, and more.

The HM1317CB has a 14 AMP motor that delivers 730-1,450 BPM and 34.9 joules of impact energy. It features Makita's electronic controller so users will benefit from the soft start, as well as a variable speed control dial, an L.E.D. service light that notifies users before brushes need to be replaced, and constant speed control that automatically applies additional power to the motor to maintain speed under load for the most challenging jobs. For added convenience, the HM1317CB has a 16.4 ft. cord and accepts the popular 1-1/8” Hex bit type.


  • Powerful 14 AMP motor delivers 25.7 ft.lbs. of impact energy to handle the most demanding applications
  • L.E.D. service light notifies the user approximately 8 hours before the brushes need to be replaced
  • Variable speed control dial enables user to match the speed to the application for greater versatility
  • L.E.D. power light indicates switch failure or cord damage
  • Rubberized ergonomic soft grip provides more comfort
  • Constant speed control automatically applies additional power to the motor to maintain speed under load to complete the most challenging jobs
  • Soft start suppresses start-up reaction for more precision and better accuracy
  • Extended life brushes are longer for more work between service intervals and less downtime
  • Automatic brush cut-off protects commutator from damage for longer tool life
  • "No hammering when idling" function helps increase tool life
  • Easy-to-operate slide switch increases productivity and allows for continuous use
  • Side handle swivels 360° for greater control
  • Makita Motor Advantage engineered with field core interlocking steel laminations, dual ball bearing armature and more copper commutator bars, increasing energy transfer efficiency for more power and longer tool life
  • Durable blow-molded rolling tool case for safe storage and easy transportation


  • (1) 20-1/2" Bull Point, 1-1/8" Hex (D-21353)
  • (1) Tool Case w/Wheels (824897-1)
  • Specs

  • Blows Per Minute (variable speed) : 730 - 1,450 BPM
  • Impact Energy (ft.lbs.) : 25.7
  • Impact Energy (Joules) : 34.9 J
  • AMPS : 14
  • Noise Level : 101 dB
  • Vibration (m/s²) : 7
  • Cord Length (ft) : 16.4'
  • Overall Length : 32-1/2"
  • Net Weight : 41.9 lbs.
  • Bit Type : 1-1/8" Hex
  • Breaker/Demo class : 42
  • Power Type : Corded
  • Shipping Weight : 60.39 lbs.
  • UPC Code : 088381-604659
  • Resources & Media