Premiums Pinion and Bull Gear are made from similar material to the crankshaft and with a high precision double helical gear, with less backlash than any of our competitors. The precision gears ensure power is transmitted over the full width
Premiums crossheads are manufactured from high quality, cast steel and the guides are manufactured from a quality manganese bronze normally used in bearings. This combination of materials provides a low friction interface and generates very
Premiums Crankshaft is manufactured from a modified 4340 material with high nickel content to reduce crack initiation and propagation. It has a high chrome content to prevent corrosion. Premium crankshafts are static balanced for smooth oper
Premiums Connecting rods are made from high specification alloy steel. Premium connecting rods are machined with high precision to ensure the alignment between the crankshaft and the crosshead.
Premium is service. We do not just say it, we mean it, and most importantly, we do it. We are National Premium Oilwell.
Copyright © 2002-2011 National Premium Oilwell Machinery Co.,Ltd