JFK cam followers

JFK rolling bearings

  • Ready for assembly
  • Quick fastening with hexagonal nut
  • Available with eccentric collar

Cam followers are non-separable needle roller units with a threaded stud, ready for installation. The outer ring, available with either a cylindrical or spherical surface, rotates freely on the stud thanks to the internal rollers, while the stud is rigidly secured to the structure with a hexagonal nut. The spherical outer ring surface compensates for lateral misalignment during operation.

JFK Group offers needle roller cam followers in three main series: CF/KR with cage, CF_V/KRV full-complement versions, and NUKR for very high radial loads, including shock loads. The version with an eccentric collar, which allows the clearance between the outer ring and the track to be adjusted, hence the name “adjusting cam followers,” is available on request, together with a lubrication hole in the stud for periodic relubrication.

Needle roller cam followers are typically used in linear guides, cam systems, material handling, and wherever a ready-to-mount unit is required to run along tracks or interact with cams.

Versions

Three series: how to choose the right cam follower

The choice mainly depends on the required load capacity and operating speed.

  1. CF / KR - With cage

    The standard series. Caged needle roller cam follower for higher-speed applications. Cylindrical or spherical outer ring. Available with an eccentric collar for clearance adjustment. Lubrication hole in the stud as standard. Standard series · With cage · Higher speeds

  2. CF_V / KRV - Full complement

    Without a cage, with a full complement of rollers. Higher radial load capacity than the CF/KR series for the same dimensions, at the expense of a lower maximum speed. Cylindrical or spherical outer ring. Available with an eccentric collar. Full complement · Maximum load capacity · Reduced speed

  3. NUKR - For very high loads

    Series designed for very high radial loads, including shock loads. Reinforced design with higher load capacity than the CF/KR and CF_V/KRV series. The choice for the most demanding applications. Very high loads · Shock load resistance · Reinforced design

Performances

Design and performance features

Threaded stud with integrated needle roller unit, ready for installation with quick fastening by hexagonal nut.

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Construction

Non-separable, ready for installation Non-separable integrated unit with threaded stud, outer ring, and needle roller assembly. Ready for installation without the need for assembly. Quick fastening to the structure via a hexagonal nut on the stud.

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Outer ring

Cylindrical or spherical The cylindrical outer ring is suitable for tracks with flat surfaces. The spherical version compensates for lateral misalignment between the stud and the track during operation.

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Eccentric collar

Available for clearance adjustment The eccentric collar allows adjustment of the clearance between the outer ring and the track after installation, optimizing system performance.

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Lubrication

Hole in the stud for periodic relubrication The lubrication hole in the stud allows periodic relubrication of the unit without the need for disassembly.

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Load capacity

Three levels to suit every need CF/KR for standard loads and high speeds; CF_V/KRV for maximum load capacity at low speeds; NUKR for very high loads, including shock loads.

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Fixing

Mounting

Mounting of cam followers

Needle roller cam followers are installed by securing the threaded stud to the structure with a hexagonal nut. When available, the eccentric collar allows adjustment of the clearance between the outer ring and the track after fixing the stud. Lubrication must be ensured before commissioning and periodically during operation through the lubrication hole in the stud.

Installation Mounting

  1. Fastening the stud with hexagonal nutThe threaded stud is inserted into the dedicated hole in the structure and secured with a hexagonal nut. Check the correct tightening torque to ensure stable positioning of the unit.
  2. Adjustment with an eccentric collarFor versions with an eccentric collar: after securing the stud, rotate the collar to adjust the clearance between the outer ring and the track. Lock the collar in the desired position.

Technical data

Construction
Non-separable, ready for installation
Outer ring
Cylindrical or spherical
Eccentric collar
Available for clearance adjustment
Lubrication
Hole in the stud for periodic relubrication
Load capacity
Three levels to suit every need

Applications

Applications

Components and application support for every industrial environment.

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JFK rolling bearings

Industrial automation

Linear guides and cam systems in automated machinery. The easy installation and availability with an eccentric collar for clearance adjustment make them suitable for systems requiring precise motion.
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JFK rolling bearings

Metal Fabrication / Machining Industry

Cam systems and die guides in machine tools. The NUKR series is the choice for applications with high loads and shocks typical of machining operations.
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JFK rolling bearings

Transmissions and axles

Motion systems with linear guides and cam applications. The availability of three series with different load capacity levels covers every application requirement.
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JFK rolling bearings

Construction Equipment

Guides and motion systems operating under demanding conditions with high loads and shock loads. The NUKR series ensures reliability even in the most severe applications.

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    Related products

    Please also consider these alternatives: For guide applications where an integrated axial guidance system is required, or where a stud-type solution is not preferred, needle roller track rollers provide the same function with a different design. For guide applications requiring higher speeds with moderate loads, ball cam rollers offer lower friction compared to needle roller cam followers. For applications with combined radial and axial loads where cam followers cannot be used, combined bearings manage both load components in a single unit.