(Photo by courtesy of Universal Superabrasiv) , Grinding wheels are composed of thousands of small abrasive grains held together by a bonding material.
Image Detail for - NATIVE AMERICAN GRINDING STONE
Fire Starter Stone Size: ~4" wide Material: Sandstone Age: Probably Woodland (2,500 - 1,250 BP) American Indian Tools: Grinder This well-worn, hand-sized.
LORAM Maintenance of Way - Rail Grinding
The wheel/rail interface of a railroad is a much talked about subject because of the cost involved in premature rail change outs , Rail grinding is considered the most effective maintenance practice to control the effects of , Image Gallery.