NTN bearings for Caterpillar track final drive: 

• thin-section angular contact ball bearings
• thin-section tapered roller bearings (for heavy excavators)

Turret rotation (swing drive): ULTAGE spherical roller bearings

Planetary gears for planetary gearboxes: HWT high-capacity needle roller and cage assemblies HWT high-capacity needle roller and cage assemblies achieve a service life of more than twice that of conventional needle roller and cage assemblies, within the space envelope. The optimized design has an increased number of rolling elements thereby increasing the load carrying capacity by 15% to 25%.

NTN
www.ntn-snr.com