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An angular contact needle roller bearing unit for seed discs has been launched, which not only offers high load carrying capacity and tilting rigidity, but also provides farmers with a maintenance-free bearing that enables easier and faster seed disc installation and removal.
Precision bearing and automotive component manufacturer The Schaeffler Group has just launched a complete bearing system for agricultural seed discs, under its INA and FAG brands.
The angular contact needle roller bearing unit not only enables extremely high load carrying capacity and tilting rigidity to be achieved, but also provides a multi-lip cassette seal, which reliably protects the bearing against contamination and prevents loss of grease. The clearance-free units are therefore supplied with the maximum quantity of grease, ensuring maintenance-free operation without any downtime.
In addition, the bearing unit is protected against the harsh operating environment (extreme dirt and heavy shock loads) by Schaeffler's Corrotect® coating, which increases bearing life significantly.
Corrotect® is a relatively low cost, 0.5 to 5µm thick zinc alloy coating with cathodic protection, which is effective against condensation, rainwater, contaminated water and weak alkaline and weak acidic cleaning agents. Under load, the coating is compacted into the surface roughness profile and is partly worn away. The chromate coating and the passivation increase anti-corrosion protection and contribute to the optical appearance of the component.
The ready-to-mount bearing unit enables faster installation and easier seed disc removal. Attachment screws for the seed discs are already integrated in the flanged bearing. The seed disc is initially attached to the bearing. Afterwards, the entire unit is screwed to the machine quickly and easily via a central screw. Seed disc change simply involves loosening the screws.
Following successful test rig trials and field tests, prototypes are now available for testing purposes. The seed disc bearing unit can be individually adapted to specific customer requirements.
For more information on Schaeffler's seed disc bearing units, please visit www.schaeffler.co.uk or telephone the marketing department on 0121 351 3833.
With a total of 66,000 employees at over 180 locations around the globe and group sales of 8.9 billion euros (fiscal year 2007), the Schaeffler Group is one of the world's leading rolling bearing manufacturers and automotive component suppliers. The corporate group includes the INA Group with headquarters in Herzogenaurach, the FAG Group based in Schweinfurt as well as the LuK Group, with headquarters in Buhl.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 21315RH KOYO | 75 | 160 | 37 |
| 22215RHR KOYO | 75 | 130 | 31 |