sp1__en_gb__en.book Seite 165 Montag, 21. Februar 2011 9:04 09
Double row cylindrical roller bearings
In bearings of series NN30, the rollers are guided on the inner ring. The outer ring is ground cylindrical and is removable, Figure 3. Series NNU49 has a cylindrically ground, separable inner ring. The rollers are guided on the outer ring.
NN30
Sealing Lubrication
Pneumatic oil lubrication
Oil lubrication
Operating temperature Cages
Schaeffler Group Industrial
00016C4D
Figure 3 Double row cylindrical roller bearing Super precision cylindrical roller bearings are supplied in an open design. Due to the high surface quality of the raceways and rollers, FAG cylindrical roller bearings are particularly suitable for grease lubrication.
When using pneumatic oil lubrication, they can be lubricated via the end faces. For pneumatic oil lubrication, single row cylindrical roller bearings in a Direct Lube design (suffix DLR) are also available. In these bearings, lubrication is carried out directly via an annular groove and radial holes in the outer ring. The bearing is sealed off from the housing by means of inserted O rings. Double row bearings have a lubrication groove and lubrication holes in the outer ring. When selecting a lubricant, the operating temperature of the lubricant must be taken into consideration. The bearings can be used at operating temperatures from –30 °C to +150 °C. Single row super precision cylindrical roller bearings have solid cages made from brass (suffix M1) or PEEK (polyether ether ketone). These cages are identified by the suffix PVPA1. Double row bearings have solid cages made from brass (suffix M).
SP 1
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