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Stanley Mid-Sized Mounted Breakers
MBX138 | MBX208 | MBX258 | MBX308

The MB/XP series is comprised of high production breakers for the most demanding applications. With a wide range of carrier compatibility (from 12 to 80 metric tons) there is a breaker for every job, whether you’re doing commercial demolition, road building, quarry work, or production breaking.

The MBX series packs serious force and is designed to break a wide array of materials. The MBX series features a patented valve system that dramatically increases the durability and performance of the tool. Less maintenance is required over the life of the breaker because the design has only two moving parts, limiting the need for servicing.








Model MBX138 MBX208 MBX258 MBX308
Weight – LBS 2270 3080 3740 4275
Impact energy – FT-LBS 2000 3000 4000 5000
Imapct Rate – BPM 450-630 400-530 350-600 400-490
Tool diameter – INCHES 3.9 4.9 5.3 5.5
Min Excavator weight – LBS 19800 26000 35200 39600
  • Auto-Lubrication to assist with important tool maintenance. The breaker-mounted, large capacity lubrication device automatically provides grease to the tool and bushings.
  • Mounted SDC Tracking Device helps operators and service personnel with maintenance planning, service tracking, and accumulated work history.
  • Heavy Duty Housings and Wear Plates for extreme durability in the harshest of applications.
  • Fixed Impact Energy Valve allows for use on a wider range of carriers.
  • Vibration Dampening Tie-Rods to maximize uptime.
  • Membrane Type Accumulator eliminates time consuming recharging.
  • Idle Blow Protector prevents blank firing.
  • Underwater Capable on specific models to increase versatility.
  • Hydraulic Overflow Protector for added durability.
hydraulic tool specifications - hydraulic tools and attachments