

CAM FOLLOWER

Cam follower are roller units or needle roller , non-separable and ready to mount . They are equipped with a pin in the inner ring, while the outer ring is designed to roll on a track . The thread of the pin allows a quick and easy access to parts of machines, by means of a hexagonal nut .
The outer ring is guided in axial direction by a flange positioned at the end of the pin and of a washer it is mounted in the pin itself .
The outer ring of the bearing is thick-walled and , as is the case for the other wheels, it is available with external spherical and cylindrical surface ( "R" suffix for the convex outer ring ).
Cam follower are available in three different versions ( series CF or KR , CF_V or KRV , NUKR) of equal size and they can be provided with or without eccentric collar.
Cam follower are marked with the letter " E" in the designation of the series.
Cam follower in object can be adjusted by means of a hexagon socket on the threaded side of the pin.
The use of more Cam follower improves the distribution of the load and allows to realize with ease preloaded linear systems.
Cam follower with eccentric collar can be tune up using the existing groove in the head of the pin and allow to obtain in a simple way an interaction between the wheel and the cam.
Cam follower in object allow to working, also, nearby components with less stringent tolerances.
During the assembly, Cam follower without eccentric collar are not adjustable in a defined position on the rolling track of the adjacent construction.
The Cam follower of the series CF or KR They are driven with a cage of steel or of steel plate.
Cam follower in question are primarily used for highly loaded applications,with fairly high rotational speed and they can withstand axial stresses caused by misalignment with oblique arrangement.
The axial guidance of these Cam follower is achieved through shoulder and thrust washers
Inside of the Cam follower it is possible to introduce a large amount of lithium soap grease for this reason they can operate for long periods without to be relubricated.
For operation in harsh conditions ,Cam follower belong to this series are available with contact seals on both sides.
Cam follower with contact seals are identified by the " UU " or " PP " suffix.
Seals provide an efficient protection against contamination and they are suitable for a temperature range between -30 ° C and + 100 ° C .
Definitions of the series
- CF or KR = Cam follower without eccentric collar with cage ( of steel or steel sheet )
- CF_UU or KR_PP =Cam follower without eccentric collar with contact seals
- CFE or KRE = Cam follower with eccentric collar
- CFE_UU or KRE_PP = Cam follower with eccentric collar with contact seals
Cam follower belong to these series are full complement needle roller.
Cam follower in question include the maximum possible number of rolling and are suitable to withstand high loads. Compared to the previously described series ( series CF or KR ) ,the Cam follower belong to this series are not able to operate at the same speed ( of the series CF or KR ) and must be lubricated more frequently.
For operation in harsh conditions, Cam follower belong to these series are available with contact seals on both sides .
Cam follower with contact seals are identified by the " UU " or " PP " suffix, CF_VUU or KRV_PP.
Seals provide an efficient protection against contamination and they are suitable for a temperature range between -30 ° C and + 100 ° C .
Definitions of the series
- CF_V o KRV = Cam follower full complement needle roller
- CF_VUU o KRV_PP = Cam follower with contact seals
- CFE_V o KRVE = Cam follower with eccentric collar
- CFE_VUU o KRVE_PP = Cam follower with eccentric collar with contact seals
This set of Cam follower is based on single row full complement cylindrical roller bearings .The outer ring with two extending edge it is guided by way of rollers that can withstand considerable axial loads ,even at thigh speeds. Two shaped laminations at " L " form with the head of the pin and with the lateral washer an efficient labyrinth seal.
Cam follower belong to this series are suitable for very high radial loads , also for shock agents .
NUKR wheels can operate at faster speeds than those of Cam follower of the series CF_V or KRV and they must be relubricated with the same frequency.
Definitions of the series
- NUKR = Cam follower with threaded pin
- NUKRE = Cam follower threaded pin with eccentric collar
All Cam follower are equipped with lithium grease with good rust inhibiting properties.
In presence of lights loads, with a relatively low speed operation and in clean environment ,wheels are maintenance-free.
In the case in which there is the presence of moisture and of impurities or if they must work at temperatures that are consistently above 70 ° C wheels must be lubricated .
All Cam follower can be relubricated through the pin , both on the side of the bearing and on the side of the thread. The duct of lubrication that is unused must be closed using a plug provided with wheels. The cap can be forced into position by means of a buffer.
Cam follower be fixed in place with hex nuts .The nuts must be clamp and fitted with elastic lock washers.
To take into latch the pin when when the nut is tightened , can be inserted into the groove a suitable tool. It must avoid giving blows to the head of the pin and make sure that the hole of the lubrication duct on the inside track finds itself in the download area.
A second hole parallel to the first can be used for a locking device which prevents the rotation of the pin or for relubrication : it is possible only with cam follower without eccentric collar.
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