Cat® B-Prefix Hammers feature low owning and operating costs, versatility, ease of use

Cat® B-Prefix hydraulic hammers, available in B4(s) and B6(s) silenced and B4 and B6 non-silenced versions, are designed for “plug-and-play” operation with a range of compact equipment—while delivering optimum life-cycle value. The new hammers are suited for skid steer loaders, multi-terrain loaders, compact track loaders, mini hydraulic excavators (3- to 8-ton operating weights), and backhoe loaders working in a range of construction and light-demolition applications, including site prep, landscaping, masonry, and concrete breaking. The B-Prefix hammers use a simple design that ensures reliability, versatility, ease-of-use and maintenance. As a package solution, the matching Caterpillar-designed hydraulic kits are also offered and the best fit for Cat machines, providing customers a breaker package with superior design and benefits.

Quality engineered

  • Design
    • Simple, reliable, industry-standard modular design with two moving parts in the piston and valve
    • Flat-top mounting enables compact working envelope and compatibility with a full complement of brackets to suit preference of coupler, linkage kinematics, or machine size
  • Field service
    • Bushings are field-replaceable, and lower bushing can be rotated 90 degrees for improved wear performance
    • Included toolbox contains charging kit, hammer paste, and spare parts
    • Housings are designed to facilitate common maintenance items. Grease fitting and gas pressure check point are easily accessed with hammer on machine
  • Gas operation
    • Gas-fired operation cycle delivers consistent, long-term high production
  • Major components
    • Cylinder, back-head, front-head, piston, and tool are manufactured with high – quality materials and processes
  • Housings 
    • Heavy-duty housing construction protects against breakage and wear
  • Piston
    • Piston transfers long shock waves into material; piston diameters are matched for maximum energy transfer; piston design and surface finish provide superior oil retention and seal life
  • Oil-control valve
    • Inward-type oil-control valve has high structural integrity and low failure rate
  • Mounting brackets
    • Interchangeability between H-prefix and B-prefix models

Tool types for the new hammers include moil, cone, parallel and transverse chisel, and blunt, allowing the hammer to be adapted to an extensive range of applications.

Top-Mount Product Specifications

  B4 B4s B6 B6s
Carrier weight, lb. (kg) 5,600 (2 540) – 7,000 (3 175) 5,600 (2 540) – 7,000 (3 175) 8,000 (3 629) – 12,000 (5 443) 8,000 (3 629) – 12,000 (5 443)
Operating weight, lb. (kg)* 351 (159) 357 (162) 571 (259) 611 (277)
Energy class, ft. lb. (J) 273 (370) 273 (370) 502 (680) 502 (680)
Impact frequency, blow per minute 600 – 1,100 600 – 1,100 500 – 900 500 – 900
Hydraulic flow, gpm (lpm) 7 – 13
(25 – 50)
7 – 13
(25 – 50)
11 – 19
(40 – 70)
11 – 19
(40 – 70)

*Operating weight is Breaker and Tool, without the bracket.

Source: https://www.cat.com/en_US/news/machine-press-releases/cat-b-prefix-hammers-feature-low-owning-and-operating-costs-versatility-ease-of-use.html