... durable and reliable bearing assembly, and a forged output drive shaft with integral bit box. We take the ISO9001:2000 ... bearing assembly with Seal-Free Technology™ bearings, and an output shaft with integral bit box. Vertical Drilling Motor Highlights : • ... Sub • Multi-lobe, Mutli-stage Power Section • Articulated Ball Drive Coupling • Straight Housing • Bearing Assembly with Seal-Free Technology™ ...