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A Modified Rock Crusher for Trails

The San Dimas Technology and Development Center (SDTDC) conducted a product search to find a mobile rock crusher with 6- to 8-inch adjustable jaws that could be operated by the hydraulic system of a trail dozer.

[photo] A worker peering into the bin mounted on the outside of the Badger Jaw Crusher.The electric Badger Jaw Crusher, from Braun Instrument Corp., was determined to be the most suitable of the crushers reviewed because it can crush a 6-inch rock, it weighs less than the typical rock crusher, and has a hopper that shields workers from rock fragments. After evaluating the electric Badger Jaw Crusher, the project leader suggested modifications to produce ¾- to 2-inch crushed rock. The tech tip, Portable Rock Crusher for Trails (0423–1301P–SDTDC), describes the product search and performance testing of the modified crusher.

Electronic versions of the tech tip can be found at:

Printed copies of the tech tip can be ordered from the U.S. Department of Transportation Federal Highway Administration at:

For more information on the modified Badger Jaw Crusher, contact Ellen Eubanks, project leader (phone: 909–599–1267, ext. 224; e-mail:

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