Model: NOV / National Oilwell Varco D-495
Table opening: 49-1/2 in (1,257 mm)
Rated static load: ≈ 1,500–1,600 kips (≈ 680–726 metric tons)
Drive: Hydraulic motor (often Hagglunds type on many rigs)
Maximum continuous torque: ~35,000 ft-lb
Maximum operating speed: ~25.5 RPM
Built for land and offshore drilling rigs.
Designed to handle large drill pipe, casing, and BHA components.
Compatible with API master bushings and slips.
Heavy-duty gearbox and bearings for high drilling loads.
Built for easy maintenance and component access.
Used on medium-to-large drilling rigs with top drives or kelly systems.
Often paired with PS-21 power slips and iron roughneck systems on modern rigs.
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