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Type NFR is a bearing supported roller type freewheel without any sealing. Lubrication and sealing must be provided by the installation. Standard lubrication is oil.
Size 8 to 20 units use steel on steel bearing support from the inner race. Above size 25, two 160.. series ball bearings are used, giving a higher overrunning speed capacity. A typical arrangement is shown overleaf. The inner race is keyed to the shaft. The outer race has a positive n6* tolerance to give a press fit in a housing to H7*. Additional side notches provide for positive torque transmission.The housing must be strong enough to not expand after assembly.
*These data refer to the indications in the product data sheet attached below (on page 2).
Stieber Hatschekstraße 36 69126 Heidelberg - Germany Phone: +49 6221 3047-0Fax: +49 6221 3047-31Email: sales@stieber.de https://www.stieberclutch.com
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