Bearings for Pumps and Compressors

2 NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services for various industrial sectors. In this context, we develop technologies in the fields of rolling bearings, linear systems, components for the automotive industry and mechatronic systems. Our research and production facilities in Europe, Americas and Asia are linked together in a global technology network. Here we concentrate not only on the development of new technologies, but...

Bearings for Pumps and Compressors 3 Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. Partnership based on trust – and trust based on quality NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continual improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics....

4 NSK is serving the Pumps & Compressors Industry Introduction 5 Standard Bearing Range 6 Scope of the Applications ›› Bearing Solutions for Pumps 8 ›› Bearing Solutions for Compressors 10 Selection of bearings for pumps and compressors Special Deep Groove Ball Bearings for Pumps ›› High Capacity Deep Groove Ball Bearings 12 ›› LNG Pump Bearings 13 ›› Creep-Free Bearings 14 HPSTM Angular Contact Ball Bearings 17 Special Bearings for Screw Compressors 20 Case Studies ›› Preventing Creep in Submersible Pumps Bearings 22 ›› Refrigerant Screw Compressors Working with Ammonia 23 Table of contents

Bearings for Pumps and Compressors 5 As a global supplier to world leading pumps and compressors manufacturing companies, NSK has the experience and understanding of helping its customers to manage their costs and improve production efficiencies. Pumps and Compressors are used in a wide range of process industries where requirements are for bearings offering long life in order to increase Mean Time Between Failures (MTBF). Downtime in production processes leads to huge costs and loss of productivity. At the same time, Pump and Compressor manufacturers are looking for more compact machines leading...

6 Standard Bearing Range Single Row Radial Ball Bearings Available ranges: 600, 6800, 6900, 16000, 16100, 6000, 6200, 6300, 6400 Series ›› Standard and special applications ›› Steel, brass or polyamide cage ›› Low noise ›› Full sealing options ›› Wide range of greases ›› Standard or special steels Single Row Cylindrical Roller Bearings with Brass Cage, Steel Cage or Polyamide Cage ›› Pressed steel cage series: EW ›› Polyamide cage series: ET ›› Machined brass cage series: EM Single Row Angular Contact Ball Bearings* ›› Pressed steel cage series ›› Polyamide cage series ›› Machined brass cage...

Bearings for Pumps and Compressors 7 Double Row Angular Contact Ball Bearings Available ranges: 3200 – 3300 / 5200 – 5300 Series ›› Steel or polyamide cage ›› Open ›› Shielded ZZ or 2Z ›› Sealed DDU or 2RS Tapered Roller Bearing ›› Inch & metric sizes ›› Standard steel / carburized steel / HTF treatment ›› Custom made sets with spacers HPS™ Spherical Roller Bearings ›› High load capacity ›› High limiting speed ›› High strength cage ›› Low noise and vibration This is a non-exhaustive overview of NSK bearings used in Pumps & Compressors. If you require additional bearings, please contact NSK.

8 Bearing Solutions for Pumps Piston Pumps Bearing Selection ›› Cylindrical Roller Bearings – Special L-PPS cage ›› Tapered Roller Bearings – P6X accuracy – Carburized steel ›› Needle Roller Bearings Operating Conditions ›› Heavy axial and radial load ›› Medium speed Bearing Requirements ›› Reduced width tolerance for precise mounting ›› Oil compatibility with cage HPSTM Angular Contact Ball Bearings series Creep-Free bearing LNG pump bearing Centrifugal Pumps Bearing Selection ›› Cylindrical Roller Bearings ›› Angular Contact Ball Bearings ›› Double Row Angular Contact Ball Bearings ›› Deep...

Bearings for Pumps and Compressors 9 Submersible Pumps Bearing Selection ›› Cylindrical Roller Bearings ›› Angular Contact Ball Bearings ›› Double Row Angular Contact Ball Bearings ›› Deep Groove Ball Bearings – special: Creep-Free bearings* Operating Conditions ›› Vertical shaft ›› Axial load ›› Large temperature difference between inner & outer rings. Bearing Requirements ›› Sealing performance ›› Prevent top bearing creeping in housing LNG Pumps* Bearing Selection ›› Deep Groove Ball Bearings ›› Angular Contact Ball Bearings Operating Conditions: ›› Speed: 1160 rpm – 3600 rpm ›› Gas temperature:...

10 Oil free Screw Compressor Bearing Selection ›› Cylindrical Roller Bearings – with outer ring guided brass cage, P6 or P5 accuracy ›› Angular Contact Ball Bearings – with outer ring guided brass cage, P6 or P5 accuracy ›› 4-point contact ball bearings – with outer ring guided brass cage, P6 accuracy, reduced axial clearance Operating Conditions ›› High speed (0.7 M.dmN–1.4 M.dmN) ›› Moderate axial & radial loads ›› Oil jet lubrication Bearing Requirements ›› Specific axial & radial clearances to provide precise screw guidance ›› High speed performance ›› Heat resistance Oil Injected Screw Compressor...