Page 13 - needle bearings

Classification and Characteristics of Bearings
NTN

Cam follower ʕʕ Needle roller type ʕʕ

This is a bearing designed for rotation of the outer ring in
which a needle roller and cage assembly and a stud in lieu of
inner ring are fitted in the thick-walled outer ring. The stud is
so threaded as to be mounted easily. This cam follower
(bearing) uses needle rollers as its rolling element and it is
further classified into one bearing type with cage and another
full complement roller bearing type without cage.
¡The bearing type with cage is suitable to comparatively high
speed running because its rollers are guided by the cage.
¡The full complement roller type enabling to use more needle
rollers than the type with cage has large load capacity.
¡The outer surface is available in both spherical (crowning)
profile and cylindrical profile.
¡This cam follower (bearing) is selectively available for both
of the metric system and the inch system.
¡Furthermore, the seal built-in type is also available.
¡The stud is of either recessed head type allowing use of a
screwdriver or hexagon socket head type so as to be
mounted and adjusted easily.

Cam follower ʕʕ Cylindrical roller type ʕʕ

This is a full complement roller bearing designed for rotation
of the outer ring in which double-row cylindrical rollers and a
stud in lieu of inner ring are fitted in the thick-walled outer ring.
The stud is so threaded as to be mounted easily.
¡This cam follower (bearing) has the radial /axial load
capacity larger than the needle roller type.
¡A steel plate is press-fitted in the outer ring and a labyrinth
seal is formed between the face ring and the outer ring.
¡The outer surface is available in both spherical (crowing)
profile and cylindrical profile.
¡The stud is of either recessed head type allowing use of a
screwdriver or of hexagon socket head type so as to be
mounted and adjusted easily.

Cam follower ʕʕ Eccentric type ʕʕ

This is a cam follower (bearing) wherein the studs of the
needle roller type and cylindrical roller type prescribed above
were made eccentric, which can then be adjusted by making
eccentric the outer ring relative position against the raceway.
¡Load distribution is easily adjustable in configuring two or
more cam followers in linear form.
¡Preload can be applied by adjustment of load distribution.
¡Alignment is possible even when the mounting hole is not
processed in high accuracy.
¡The outer surface is selectively available in both spherical
(crowning) profile and cylindrical profile.
¡The stud is of either recessed head type allowing use of a
screwdriver or hexagon socket head type so as to be
mounted and adjusted easily.

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