Category Archives: Bearing Roller Exporters

bearing roller exporters

Bearing Roller Exporters History and Evolution

Bearing Roller Exporters – it has been 60 years since this handy machine has come into being, and although there are developments in its mechanism with passing time, it is still ‘rolling’. Typically, the roller in an ordinary bearing is just a little longer than its diameter, but in needle roller bearing, each of the needle roller is almost four times in length than its diameter, which is actually the reason that these bearings have larger surface area touching the inner and outer races, as a result of which, they are more efficient in supporting more load, as compared to other kinds bearings like, ordinary roller bearings and ball bearings. This is precisely the reason that roller bearings are usually the preferred by design engineers. Bearings Roller are majorly used in automotive and industrial power transmission apparatus, involving engines, pumps, and any and every machinery that depends upon rotating mechanisms. Bearing Roller Exporters produce the bearings with either steel, plastic and aluminium casting of cages and the other components that comprise a bearing. There are various designs of these bearings, of which, here we will discuss about the caged needle roller bearings.

  1. Types of Bearing Rollers

Typically, any bearing roller exporters of the following components, the inner shaft, a cage of needles (basically a ring with spaces cut into it for the rollers), the needle rollers and the outer race junction. Although Industrial roller bearings are manufactured in various kinds of designs, there are four main types –

  • Caged needle roller bearings
  • Drawn-cup needle roller bearings
  • Precision race needle roller bearings
  • Thrust needle roller bearings
  1. Evolutionary steps of the needle roller bearing

The caged needle roller bearing was invented back in 1949, towards the last part of the World War II, by Schaeffler brothers, Dr. George and Wilhelm of The Schaeffler Group. Back then, the full complement Industrial bearings were in popular use. The main disadvantage of this type was that, in high speed mechanisms, these roller bearings tended to distort and thus, increase the frictional heat of the overall apparatus. Also, in case of narrow clearance space, the rolling elements often got stuck or locked, creating more friction and so, reducing the efficiency. These problems were overcome when caged needle bearings were invented. The needle rollers rotates axially in the cage, thus efficient in high speed mechanisms, reduces friction, while also being resilient. The cages that hold the roller bearing, are of various types, single-split (where the needles would be separate and evenly spaced throughout), split-halves (where there would be space for a pair of needles spaced evenly throughout the cage), half-shell type, solid cages, single-split with diagonal spring bar links. Throughout the 1980s and 1990s, the design of the cage was under constant improvement, focusing on reduction of overall size, easy-to-lubricate designs (e.g. Precessed Cages). The various improvements to the basic design has led the static load capacity upto almost 25% and even double for dynamic load capacity.

The basic design provided by the inventors still stand today, more or less, inspite of a lot of developments done over the course of 60 years to adapt the bearings with the changing times and rapidly increasing demands from every corner of the automotive, industrial and other machinery spheres. The caged bearing roller bearings have also played an important role in the making of smaller vehicles that have added efficiency as well as are more economic. At this point, there are over 15000 variations of the roller bearings being manufactured by the Bearing roller exporters.

Bearing Roller Exporters

Comprehensive Design Process to Needle Roller Exporters

Needle Roller Bearings are considered the most preferred choice of all the other kinds of bearings. The needle roller bearings are different from ordinary roller bearings and ball bearings in that, they use little cylindrical rollers (needles) that are almost four times in length than their diameter, thus covering more surface area than, say, a ball bearing, and resulting in being more efficient for supporting heavier load and reducing friction better as well as preventing excessive heating up of the mechanism. Needle Bearings come in various designs and are used in a variety of automotive and industrial purposes. These are manufactured using steel, aluminium as well as plastic castings. Needle Roller Exporters of India export Needle Rollers to United States of America, Japan, Indonesia, United Kingdom, Peru, Egypt, Thailand, Bangladesh, Italy, United Arab Emirates, Germany and other countries. United States of America has been recorded as one of the leading importers of Needle Rollers manufactured in India.

1. The Various Designs that the Needle Roller Bearings come in

The basic constitution of a needle roller bearing comprises of an inner race or shaft, a needle cage that holds and aligns the needle rollers, the rollers themselves and finally, an outer race. There are several kinds of designs that needle bearings are manufactured in and the utility of each depends on the demand of the apparatus it will be required in. There are two main types and several other sub-types of needle roller bearings manufactured. The two main kinds are the full-complement of loose-needle bearings (which were used majorly in the past, before the caged needle roller bearings were invented, over 60 years ago, in 1949), and the caged needle roller bearings. The full complement needle bearings have no retainers and are comparatively economical, but come with a couple of major flaws: in faster paced machinery, the loose-needle bearings have a tendency to skew or misalign, thereby raising the frictional heat; in addition, when the clearance space is tight, the bearings lock or get stuck too often.  The caged needle bearings, have a complex set up with multiple needle rollers universally spaced in a cage, rotating axially, thus overcoming all the above shortcomings, with the added advantage of producing superior lubrication capability and being three times quicker.

The sub-types include drawn cup, precision race, thrust, heavy duty, air-frame and track needle roller bearings. The heavy duty bearings, as the name suggests, have substantial outer rings that work better with heavier and hardened machines, and have extreme load capacities. The drawn cup needle bearings have both loose needle as well as caged needle models. The loose needle drawn cup bearing has rollers with spherical-ends, with an outer raceway, which increases its load capacity, whereas, the caged needle drawn cup bearings have retainers which has relatively lesser load capacity but have higher speed power and reduce the chance of misalignment.

2. Applications of Needle Roller Bearings

The needle roller bearings have major applications in the automotive and industrial spheres, like automotive transmissions, smaller vehicles, tools motors and engines, aircraft controls, farm equipments, gear pumps, hydraulic pumps, constructions tools and apparatus, and almost in any and every rotating machinery.

The various designs of needle roller bearings are still under constant improvement and development to meet the newer demands of the growing industries all over the world, while its application in diverse spheres increase manifold, simultaneously. Among the Needle Roller Exporters of India, the export business in Noida are reported to be one of the largest, followed by Gurgaon and Delhi respectively.