SINGLE ROW CAM ROLLERS
Cam rollers of the narrow series 3612 or LR2_...NPP are based on the proven sealed single row deep groove ball bearings ( suffix -2RSR or PP ), for their internal design.
Cam rollers of the narrow series 3612 or LR2 are produced with -2RSR or PP - type contacting seals as standard. These seals provide a very effective and efficient sealing of the bearing compartment against penetration by foreign particles even under unfavourable operating conditions.
The narrow cam rollers are available with either cylindrical , without suffix, or crowned outer ring outer diameter identify with suffix "R" ( for code 3612 ) or "U" ( for code LR2 ), as standard.
The suffix "R" or "U" identifies an execution where the radius of crowing on single row cam rollers for the series 3612 is standardised at 400mm and 500mm for series LR2, careless of their outer diameter.
Single Row cam rollers are equipped with pressed steel cages, as standard.
For the contacting seal of sealed cam rollers a wear-resistant synthetic rubber (NBR) is used as standard material.
This seal material is suitable for operating temperatures of -30°C up to +110°C
On request cam rollers are supplied with alternative seals materials.
Cam rollers incorporating either seals or shields are supplied grease filled from the factory with a proven high quality rolling bearing grease suitable for operating temperatures of -30°C up to +110°C.
Although cam rollers, operating under normal conditions, run generally maintenance free. Some application require additional lubrication where high speeds, heavy dust, permanent operating temperatures over +70°C exist. Double row cam rollers only feature a lubrication hole in the inner rings to provide a simple and effective re-lubricating method.
Where re-lubrication is necessary, it is emphasised that, undue pressure by the re-greasing method may cause unnecessary damage to either the seals or shields.
Cam rollers with cylindrical outer ring diameter are produced to normal class tolerance ( PN ) as standard.
For cam rollers with spherical outer ring diameters, the outer ring diameter tolerance is double the standard value.
Some of the smaller cam rollers may also be produced to tolerance classes P6 or P5 on request.
Cam rollers are produced with normal internal clearance group, CN , as standard.
ITS Italia cam rollers are also produced to other internal clearances.
Unlike the normal rolling element bearings, the outer ring of cam rollers contact their adjacent mating surface on a very small contacting area; this causes deformations of the outer ring.