12 1/4”mining tricone bit IADC 645USED FOR limstone ,sandstone dolomite and chert

Cutting structure gauge rows are ovoid type and inner rows are conical type

Designed for medium hard and abrasive formation with high compresssive strengts such as limstone ,sandstone dolomite and chert

Application 29000-38000psi 2000-260mpa

Sjirttaol proection two rows tungsten carbide on the shirttail , wear resistant arbide on the side of lug

Product specification

IADC CODE 645/642

 Bearing type roller-ball-thrust button /sealed bearing

Circulation type jet air

Connection 6 5/8”API

BIT DIAMETER 311MM 12 1/4”

Product weight 11kgs

Weight on bit 36750-73500lbs

Rotary speed 110-80rpm

Air back pressure 0.2-0.4mpa