Duplex Bearings Market: Introduction

There are different elements in machines, bearings being one of them, which allow the movement of the machine components along each other. Bearings are an important integral part of any object, to emphasize this, bearings support sky scrapers during earthquakes by offering them some movement. In fact even human beings whose joints involve sliding contact bearings, would come to a stop if they stop working. Duplex bearings are pair of two matched bearings. The duplex bearing pair provide better shaft location with enhanced accuracy. They are also used to increase the stiffness and thereby the capacity of the bearing assembly. This also enhances the bearing position in both axial and radial directions and the load bearing capacities. The axial and radial load bearing capacity is highly increased unlike that in single bearings. These matched bearing pairs have their outer or inner rings relieved selectively by precise amount called preload offset. During installation, when the matching bearings are clamped, their offset faces come in contact thereby creating a long-lasting preload within the bearing set. These type of bearings generally have speed limits owing to the rapid heat generated due to the rigid preload. Duplexing of bearings is mainly used where there is need of predictable radial and axial rigidity. They can bear thrust loads in both directions or even in some cases they are used in applications where very heavy uni-directional thrust loads are present.

Duplex Bearings Market: Bearing Arrangements

When matched bearings are clamped and installed in axial direction, the gap is closed which results in generation of preload on these bearings. There are typical three types of duplex bearing mounting arrangements used namely, face to face bearing arrangement, back to back bearing arrangement and tandem bearing arrangement.

Face to face bearing arrangement: it is also referred to as the X arrangement or DF arrangement. In this type, the two halves are placed in such a way that the line angle of contact of the bearing assemble in the inward direction and these lines form X shape and hence called X arrangement. This type has low moment stiffness and hence must be placed appropriately in order to provide opposition to the moment load. The speed withstanding capacity is also less owing to the fact that they can carry misalignment to a definite level only.  They need higher lubrication and external arrangements to initiate cooling in order to avoid seizure of the bearings involved due to thermal expansion.

Back to back bearing arrangement: it is also referred to as DB arrangement or O arrangement. These bearings are higher moment stiffness than the DF bearings. They have higher rigidity and maximum spread. They are the most commonly used bearings.

Tandem bearings: it is also referred to as DT arrangement. In this type two halves are placed in such a way that the lines of angle of contact are parallel. This provides a heavy duty bearing arrangement but does not withstand radial load and is uni-directional load bearer. The axial stiffness is almost twice that of the face to face or back to back bearing arrangements considering the same pre load. They are usually used to carry heavy thrust loads but in one direction only.

Apart from these types of bearing arrangements, there are other methods which are used for extreme cases such as in certain conditions where the diameter of the shaft cannot be further increased to accommodate larger bearings in order to increase load withstanding capacity and also in some conditions where increased stiffness is essential in the bearing assembly. In these situations duplex bearings are used but in sets of three or even more number of bearings to meet the requirements.

Duplex Bearings Market: Advantages

Duplex bearings are used in situations where additional capacity is essential but space is insufficient for larger bearings radially. The duplexing of bearings provide several advantages such as they can carry heavy radial loads, can withstand combined radial and thrust loads, they show excellent rigidity and can carry reversing thrust loads and moment loads. The radial displacement is also reduced to a minimum and accurate functioning is also possible. Other advantages include the ease in assembling and they have minimum run out.

Duplex bearings with face to face arrangement (DF arrangement) are used in applications where there is need for accommodation of misalignment. DT arrangement is used in applications where greater load withstanding capacity is required without increasing the size of the bearing. DB arrangement is used in applications where high moment rigidity is essential. They are used in various industries such a medical equipment, military and defence, construction equipment, robotics, recreational vehicles, oil derricks and high speed trains.

Duplex Bearings Market: Key Companies

The key manufacturers of duplex bearings include SKF Inc., RBC Bearings, Emerson Bearing, NSK, PIB Bearings Inc., and NTN Corporation.

The report offers a comprehensive evaluation of the market. It does so via in-depth qualitative insights, historical data, and verifiable projections about market size. The projections featured in the report have been derived using proven research methodologies and assumptions. By doing so, the research report serves as a repository of analysis and information for every facet of the market, including but not limited to: Regional markets, technology, types, and applications.

The study is a source of reliable data on:

  • Market segments and sub-segments
  • Market trends and dynamics
  • Supply and demand
  • Market size
  • Current trends/opportunities/challenges
  • Competitive landscape
  • Technological breakthroughs
  • Value chain and stakeholder analysis

The regional analysis covers:

  • North America (U.S. and Canada)
  • Latin America (Mexico, Brazil, Peru, Chile, and others)
  • Western Europe (Germany, U.K., France, Spain, Italy, Nordic countries, Belgium, Netherlands, and Luxembourg)
  • Eastern Europe (Poland and Russia)
  • Asia Pacific (China, India, Japan, ASEAN, Australia, and New Zealand)
  • Middle East and Africa (GCC, Southern Africa, and North Africa)

The report has been compiled through extensive primary research (through interviews, surveys, and observations of seasoned analysts) and secondary research (which entails reputable paid sources, trade journals, and industry body databases). The report also features a complete qualitative and quantitative assessment by analyzing data gathered from industry analysts and market participants across key points in the industry’s value chain.

A separate analysis of prevailing trends in the parent market, macro- and micro-economic indicators, and regulations and mandates is included under the purview of the study. By doing so, the report projects the attractiveness of each major segment over the forecast period.

Highlights of the report:

  • A complete backdrop analysis, which includes an assessment of the parent market
  • Important changes in market dynamics
  • Market segmentation up to the second or third level
  • Historical, current, and projected size of the market from the standpoint of both value and volume
  • Reporting and evaluation of recent industry developments
  • Market shares and strategies of key players
  • Emerging niche segments and regional markets
  • An objective assessment of the trajectory of the market
  • Recommendations to companies for strengthening their foothold in the market 

Note: Although care has been taken to maintain the highest levels of accuracy in TMR’s reports, recent market/vendor-specific changes may take time to reflect in the analysis.

Custom Market Research Services

TMR offers custom market research services that help clients to get information on their business scenario required where syndicated solutions are not enough.

REQUEST CUSTOMIZATION

Duplex Bearings Market

Pre Book