NBR Premium Ball Bearing Units - Japanese Industrial Standard
The premium ball bearing units of the NBR brand are designed like deep groove ball bearings and have inserts which are sealed on both sides e.g. with Perbunan or Viton.
NBR ball bearings are manufactured at the increased level of quality ABEC3/P6. For naturally, their quality is constantly checked according to DIN ISO 2859-1. Furthermore the development ant the production are in accordance with DIN EN ISO 9001: 2008 and recently certified again.
Because of maximum quality requirements, high reliability and an attractive price-performance NBR ball bearings represent an interesting alternative in the market.
They are mounted in housings of different designs and can be delivered in a range of materials, such as:
- Roller bearing steel 100 Cr 6,
- stainless steel AISl 440 C (1.4125)
- or polymer.
There is also a choice of materials and versions available for the housings, for example:
- Grey cast iron GG,
- cast steel GJS (GGG),
- stainless steel AISI 304 (1.4301),
- polymers in different colours.
The inserts are supplied with a filling of special roller bearing grease in the factory, which means that under normal working conditions they remain maintenance-free throughout their service life, just like standard deep groove ball bearings. This does not apply, however, to inserts which are exposed to extreme loads (high temperature, low temperature or environmental influences); special lubricants are available for these heavy-duty conditions.
NBR ball bearing units are suitable for a flexible range of uses and meet a wide range of different requirements. They are most frequently used in the following industries: special engineering, conveying systems, apparatus engineering, agricultural machinery and packaging machines.
NBR technology offers you the choice between different housing versions, which all have one thing in common: they are rust-resistant.
Stainless steel housings, stainless steel sheet, galvanised sheet steel, chromated, polymers (green, black, white).
NBR ball bearing units are also supplied in special versions, including stainless steel or polymer, surface-coated or with special seals. These variants are mainly used in the following sectors: Food industry, pharmaceutical industry, beverage bottling systems, glass processing machines, coating and drying lines, bakery machines and other fields of application with extraordinary temperature and environmental conditions.
Inserts with double lubrication
Thanks to two grease holes provided on the outer race the inserts can be installed in Japanese and European housings.
The NBR – NTN – SNR benchmark test
The engineers Professor Sturm and Partner, with headquarter in Dresden,
conducted the following comparative test for a ball bearing from the
trademark „NBR“ to verify that a qualitative statement on their
performance potential was possible.