Top Materials for Making Reducer Bearings

by Chirag

Bearings are mechanical assemblages that aid machines in carrying bulky items with ease. These components improve effectiveness by moving at very high speed, rotational or straight motion, and reducing friction. Every machining application that involves moving parts uses bearings. Bearings carry out an essential role in virtually every system, from automobiles to ceiling fans to machines in Industries.

A reducer bearing is a bearing that assigns the complete integration of top-precision gear for reduction and top-precision bearing of the axle’s radius in a secure unit. This system of transmission permits the usage of the reducer bearing over various areas, such as measuring equipment, machine tools, robotics and automation, the aircraft Industry, direction systems, the field of medicine, woodworking field, in the military, the machines used in textile industries, glass treatment, printers branch, and also machines used in filling.

The materials of a bearing can be built with metals, plastics, or the combination of parts, based on its mode of application, type of bearing, application, load, speed, and condition of operation. The way it is lubricated is also an important factor. 

Outlined below are some of the very frequently used materials when producing reducer bearings:

Chrome steel SAE 52100

Chrome steel possesses a superb capacity for wear resistance and a tough hardness close to 64 HRC. Bearings produced by chrome steel do function at temperatures close to 120° Celsius, and upon treatment by heat, can rise to a temperature of 220°C. Though, the downside of bearings made with chrome steel is that they have low chromium percentages, which makes them averse to weather effects. 


Nylon is a complex compound, a crystal-like material, well used when making bearing materials. It occurs as a layer that is sintered in the body of an injection-molded or metal sleeve. They possess superb toughness, friction abilities, chemical resistance, and fatigue. 

Phenolic materials 

Phenolic materials are mostly utilized for cages with ball bearings having high-speed such as those used in the spindles of machine tool equipment. They resist acid, water, and alkali solutions very well. Though they possess a thermal conductivity, which is low and they do increase in size, rendering them quite undesirable in an application that needs high load-speed. They serve as a substitute for metal bearings used in gears made with an electrical switch, bearings of a water turbine, and the shaft bearings of a ship propeller. 

Nitrile rubber 

Nitrile rubber or Buna is among the very traditional seal material for bearings. They are resistant to several chemicals and can be utilized over a wide range of temperatures. Buna also possesses adequate mechanical properties, and the cost of production is affordable. Though, it is used only when a particular app needs their special properties as a result of their over-the-top cost. 


Polytetrafluoroethylene (PTFE), popularly referred to as Teflon, is a type of polymer material with a self-greasing property, extreme chemical inertness, and a little coefficient of friction that makes it suitable as a material for bearing cages with a rolling-element, sliding bearings, journal among others.

Final Thoughts

This article highlights the intricate details of a typical reducer bearing. The elements of a reducer bearing, its function, and the type of materials are explicitly discussed.

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