Laboratory Jaw Crusher. The 3″x 2½" (No. 1) Laboratory Jaw Crusher will reduce hard rock from 2½ inch to ¼ inch and finer at a rate of from 50 to 150 pounds per hour. ... Type WC, Braun Type US Pulverizer, 3 H. P. motor and accessories as described above. CRUSHER, Chipmunk—Small size, Type VC, with four V belts, Sterling Mono enclosed ...Web