... / KYU NEEDLE ROLLER BEARINGS

Cam follower

Cam follower are roller units or needle roller, which are nondecomposable 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 connection to machine parts, using 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.

PRODUCT INFORMATION

PRODUCT INFORMATION

We offer customized and certified products.

Cam followers with eccentric collar are marked with the letter “E” in the designation of the series.

This type of cam followers can be adjusted using a hexagon socket on the threaded side of the pin. 
The use of more cam followers 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.

These cam followers allow to work, also, nearby components with less stringent tolerances.

During the assembly, cam followers without eccentric collar are not adjustable in a defined position on the rolling track of the adjacent construction.

The cam followers of the series CF or KR are driven with a cage of steel or of steel plate.
These cam followers 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 followers is achieved by shoulders and sliding bearings.

A high amount of lithium grease can be introduced inside the cam follwers; therefore, they can operate for long periods without needing to be relubricated.

When they have to work under severe conditions, the cam follwers belonging to this series are available with sliding seals on both sides.
Cam follower with sliding 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 belonging to these series are full complement needle roller.
“CF_V” or “KRV” series cam followers include the maximum possible number of rolling and are suitable to withstand high loads.

Compared to the previously described series (series CF or  KR), these cam followers are not able to operate at the same speed and must be lubricated more frequently.

When they have to work under severe conditions, the cam follwers belonging to this series are available with sliding seals on both sides.
Cam followers 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

The series “NUKR” of cam followers 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 followers belonging 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 followers 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, cam follwers are maintenance-free.
In case there is humidity and impurities or if they have to work or at temperatures that are constantly above 70°C the cam followers should be lubricated.

All cam followers 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 using a buffer.

For all cam followers with a threaded stud, ITS Italia supplies grease nipples with a particularly small footprint and equipped with a cylindrical shank (this, however, must be ordered separately).

Cam followers can 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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