Used on steel; 2.374 in min. 2.376 in max bore dia. 3.1250 in nom bse thk. 2 in. nom base lg, 3.1250 in. nom housing h, 2.9370 in nom housing lg, 2 in nom housing w; open shaft end; 0.5000 in nom mtg hole dia. 2 in nom c to c dist between mtg holes along w, 1.6250 in nom height from bottom of base to bore ctrline.