Page 225 - needle bearings

Roller followers: Yoke-type track rollers
NTN

Track roller components Features

Inscribed circle diameter :П6
Type with cage
Inner ring : without
Outer profile : spherical
Seal : with ¡The needle rollers and the cage are retained in the outer ring with a steel plate
ɹreinforced synthetic rubber seal, and these are inseparable from each other.
¡The needle rollers guided by cage.
Inscribed circle diameter :П30 ¡Shaft (Pin) must be provided with a thrust washer or a flange to guide the outer ring.
Type with cage
Inner ring : with
Outer profile : cylindrical
Seal : with

¡Needle rollers guided by cage.
Inscribed circle diameter :П30
¡The outer ring is guided in axial direction by the thrust washer press-fitted in the inner
Type with cage
ɹring.
Outer profile : cylindrical
¡Labyrinth is formed between the outer ring and the thrust
Seal : with
ɹwasher.

Inscribed circle diameter :П30
Full complement roller type
Outer profile : cylindrical
Seal : with
¡The outer ring is guided in axial direction by the thrust washer press-fitted in the inner
ɹring.
¡Great rated load due to the full complement roller type.
¡Lower allowable running speed than bearing with cage.
Inscribed circle diameter :П15.875 ¡Labyrinth is formed between the outer ring and the thrust washer.
Full complement roller type
Outer profile : cylindrical
Seal : with

¡Greater rated load, best-suited to applications subjected to high load and shock load.
Inscribed circle diameter :П50 ¡A steel plate is press-fitted in the outer ring to form labyrinth between the plate and
Double-row cylindrical ɹthe side plates at both sides of the inner ring, whereby the required sealing
Full-complement roller type ɹperformance is secured and the side plates are held so as not to separate from
ɹone another.
Labyrinth seal
¡The inner ring and the side plates are tightened together in axial direction for
Outer profile : spherical
ɹ non-clearance.
¡The outer ring is guided in axial direction by the outer ring ribs and the end faces of
ɹcylindrical roller.
Inscribed circle diameter :П25
Particularly Type NUTW provides the following features.
Double-row cylindrical
¡The greatest rated load, of the roller followers.
Full-complement roller type with
¡Due to the outer ring with inner ribs, this type is excellently resistible to axial load and
center rib
ɹmoment load and, in addition, runs smoothly, though depending on actual
Labyrinth seal
ɹoperatingconditions.
Outer profile : spherical
¡Good lubrication effect and longer life are expectable by increasing thegrease fill volume.
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