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Type and Part CodeType

Applicable axis
diameter

FeaturePart CodeCFSф 2.5 ~ ф 6CFS
Minuature type

Built-in very thin needle roller.
Enables compact design due to verysmall outer ring diameter incomparison to stud diameter.

6VA

Type Stud diameter
A: With hexagon socket on the stud head

V: Full complement
None: With cage

ф 6 ~ ф 20

CF-SFU
Easy mounting type

A type with step on stud to allow easymounting.
Optimal for devices with limited spacefor stud tightening.
Available with seals only.

V: Full complement
None: With cage

VCF-SFU

16

TypeStud diameter

V: Full complement
None: With cageR
R: Crowned outer ring
None: Cylindrical outer ring

UU: Sealed type
None: Shield type
R: Crowned outer ring
None: Cylindrical outer ringф 3 ~ ф 10

Hexagon socket on the stud head.
Easy mounting with hex-wrench.

CF-A
Standard typeHexagon socket on stud head

CF-AB
Standard typeHexagon socket on both sides

ф 16 ~ ф 30

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8VUU

Both of stud head and thread ends
have hexagon holes and integrated
concave grease nipples. Available formounting with either hexagon
sockets and lubrication from bothsides.

Cam follower which allows high radialloading and moderate axial loadingwith integrated cylindrical roller indouble rows. Integrated concave
grease nipples and hexagon sockets
on both sides allow mounting andlubrication from either side.

V: Full complement
None: With cage

RA

A: With hexagon socket on the stud headType Stud diameterф 10 ~ ф 30

NUCF-AB
Full complement double row type

CFUU: Sealed type
None: Shield type
R: Crowned outer ring
None: Cylindrical outer ring

CF 16 V

UU

R

AB
AB：With hexagon socket on both sides.
(With integrated concave nipples)Type Stud diameter

NUCF 16 R

AB

Type Studdiameter

AB: With hexagon socket both sides.
(With integrated concave nipples)

R: Crowned outer ring
None: Cylindrical outer ring

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Type

Applicable axis
diameterф 5 ~ ф 10Part CodeFeature

General purpose cam follower withscrewdriver groove on the stud head.

CFStandard type
Screwdriver slot on stud head

V: Full complement
None: With cage

UU: Sealed type
None: Shield type

CFUU8VType Stud diameterф 5 ~ ф 10

CFH-A
Eccentric typeHexagon socket on stud head

Available for the same mounting holeas general type.
Compact and high accuracy eccentric
cam followers with integrated
structure enables easy finepositioning adjustment simply byrotating stud due to eccentric studhead shifting 0.2 to 1mm from stud
mounting axis.

V: Full complement
None: With cageф 12 ~ ф 30

CFH-AB
Eccentric typeHexagon socket on both sides

N

R: Crowned outer ring
OptionNone: Cylindrical outer ring (Dedicated grease nipple)
UU: Sealed typeNone: Shield type
R: Crowned outer ring
None: Cylindrical outer ring

CFH 8VUURA

A: With hexagon socket on the stud headStud diameter
Type
V: Full complement
None: With cage

Eccentric cam follower withintegrated concave grease nipples onboth sides. Available for mounting
and lubrication with hexagon holes
on both sides.

RUU: Sealed type
None: Shield type
R: Crowned outer ring
None: Cylindrical outer ring

CFH 16 V

UURAB
AB: With hexagon socket on both sides(With integrated concave nipples)Type Stud diameter
V: Full complement
None: With cage

UU: Sealed type
None: Shield type
R: Crowned outer ring
None: Cylindrical outer ring

ф 6 ~ ф 30

CFT
Tap hole type

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Cam follower with tap for piping atstud head and thread of general type.
Optimal for location that requires
concentrated lubrication piping.

CFT16

VStud diameter
Type
CFHT: Eccentric typeUU

RA
A: With hexagon socket on the stud head(Applicable shaft diameter ф 12 ~ ф 30)
None: Screwdriver slot on the stud head.

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Structure and Features

Accuracy standard

Cam followers are compact and high rigid bearings with stud. It has a structure that an outer ring with builtin “roller” rolls over a track (raceway) and is utilized as guide roller for cam mechanism or linier motion. The
cam follower is designed with a thick-walled outer ring in order to provide high rigidity to endure heavy load
or impact load at contact portion with the track.
Outer rings have two shapes – crowned outer ring and cylindrical outer ring. The cylindrical outer ring iseffective for heavy duty applications since it contacts with large contact area of the associated objects sothat can mitigate the contact surface pressure. The crowned outer ring is suited for absorbing eccentric load
since it absorbs angular misalignment due to a mount error. They have two internal structures – one withcage and one with full complement. Caged type cam followers are suited for high speed application, since
the guiding feature of cage enables the rotation of "rollers" to be stable. Compared with caged type cam
followers, full complement type is effective for applications with low-speed operation of heavy load due toits larger load rating. Full complement type also includes double-row cylindrical roller type which allows
moderate axial loading.
Cam followers shall be fixed by tightening hexagon nut at stud thread by holding the stud with screw driveror hex-wrench.
Cam followers with eccentric axis on the stud thread have an advantage to adjust the variation of mounting
position within its eccentric range, without requesting high machining accuracy of mounting hole position.

Outer ring

Cage
Outer ringSide plate

Needle roller

Cage

Needle roller

Side plateStudStud

Hexagon hole

Table-1 Accuracy
Cam follower series in metric(CF--, NUCF--)
Category
Name
Crowned outer Cylindrical outerringring
Dimension tolerance of outer0
Refer toring outer diameter (D)-50
Table-2

Unit: µm
Compact type(CFS--)
Cylindrical outer ring
Refer toTable-2

Dimension tolerance of stud
diameter (d)h7h6Dimension tolerance of outerring width (C)

0-120

0-120

Table-2 Accuracy of outer ring (Metric series and compact type roller outer ring) Unit: µm
Nominal outer ring outer
Dimension tolerance of mean
Radial runout of outer ring
diameteroutside diameter in a single planeKea
D (mm)Δ Dmp
OverIncl.

highlowmax.

6 (5 or more)

180-81518300-91530500-112050800-132580

1200-1535

Hexagon hole

Structure of type CFS..A

Structure of type CF..A

Outer ring

Outer ring

Cage

Shield plate

Cylindrical roller

Side plate

Needle roller

Grease nipple

Grease nipple
StudHexagon hole
Grease nipple

Structure of type CF..ABNOSE SEIKO CO.,LTD.

Side plate

Hexagonhole

Hexagonhole146

Accuracy of cam follower is indicated in Table-1 and Table-2 below.

Hexagon hole
Grease nipple

StudStructure of type NUCF..ABNOSE SEIKO CO.,LTD.

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Radial internal clearance

Track load capacity

Table below indicates radial internal clearance of cam follower.
Table-3 Radial internal clearance

Radial internal clearance
Double-row
cylindrical roller
cam follower(NUCF)

Cam follower series
in metric(CF)Compact type(CFS)

CF3 ～ 5

CFS2.5 ～ 5317

CF6 ～ 8

CFS6520

CF10 ～ 12-1

525

CF16 ～ 20-1

1030

CF24 ～ 30-2

1040

NUCF16 ～ 24

025

NUCF24-1 ～ 30-2

530

min.

max.
7
Track capacity factor

Part code

Unit: µm

Track load capacity means a permissive load under which the outer ring of cam follower and the mating
surface are allowable to be used over a long period without causing any deformation nor compression mark.
Track load capacity depicted in dimension table indicates a value for which hardness of steel mating material
is assumed to be HRC40. In the case that the hardness of mating material is not HRC40, track load capacity inthe dimension table shall be multiplied by value of track load factor obtained by Figure-1.

6
Crowned outer ring
Cylindrical outer ring5432102025303540455055 58
Hardness [HRC]

Figure-1 Track capacity factor

Lubrication

Fits
Cam followers require machining of mounting hole to eliminate play at fitting portion especially for theportion which is subjected to impact shock due to its application in cantilevered mounting. Table-4 indicatesrecommended fits between cam follower and its mounting hole.
Table-4 Dimension tolerance of stud mounting hole
Dimension tolerance of studPart code
mounting hole
Cam follower series in metric (CF)H7

Compact type (CFS)

H6

Double-row cylindrical roller cam follower (NUCF)H7

Maximum permissive load

All the JNS cam followers are lubricated with pre-packed high quality lithium soap-based grease grade 2(RoHS compliant) and are ready to use. For applications requiring high prevention measure against invasionof foreign matter or leakage of lubricant, products with seal(part conde--UU) which integrate special
synthetic lubber with high abrasion resistance are also available.
Grease shall be packed up to volume approximately one-third to one-half of internal space of bearing.
Lubrication interval varies depending on operation condition. Referential interval may be every six to twenty
four months for cam followers with cages and every one to six months for full complement type with greasein the same type.
Some excessive grease may leak at the beginning of usage or immediately after re-greasing even for theproducts with seal. Aging operation period is recommended prior to application in which no contamination
by grease is allowed in and around device. Wipe and clean any leaked extra grease after this operation.
Dedicated grease nipple shall be knocked in onto cam follower by pressing flange portion of the nipple
using fixture shown in Figure-2.

Permissive load of cam follower is subjected to change in accordance with bending strength and shear
strength of its stud in addition to standard rating load of needle bearing due to its design with stud. Thisload is indicated as maximum permissive load.

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Accessories
Accessories for cam follower of standard specification are shown in Table-6. Dedicated grease nipple isavailable upon customer request by ordering products with suffix “N” added to part code.

Grease Nipple for CF..AB typeExample) CF 8 UUR -N
Dedicated grease nipple

SteelStainless

Concave Grease Nipple

Concave Grease Nipple

CF..AB, CFH..AB, NUCF..AB

CF..MAB, CFH..MAB(Steel type)(Stainless type)Also, type CF-AB and type NUCF-AB have integrated dedicated concave grease nipples installed at bothsides.
DIMENSIONS OF GREASE NIPPLES

Dimensions of supply nozzle for CF..AB type

Nipple dimension

CF, CFHdD

D1

L

L1

CF5

3.2 7.569

5.5 1.5610

5.5 1.5

CF6 ～ CF10-1 47.5

W

Type

CF10ABK(M10 × 1)
135

Stop plug*1)

CF..AB
CFH..ABNUCF..AB̶

Hexagon nuts
style 2
Attached

CF..A
CFH..A
CFS
CFT

Rc1/8

130
Prepacked

̶̶

Attached

Prepacked

6 ～ 10-1̶

Installed̶Prepacked

12 ～ 20-1

Attached

Installed̶Prepacked

5̶̶

Attached

Prepacked

6 ～ 10-1

̶Attached

Attached

Prepacked

6 ～ 10-1

̶Attached

Attached

Prepacked

CF16AB
CF18AB

GreaseNPAB-2R2.5

̶Resin plug*2)

CF12AB
CF12-1AB

20

Table-6 Accessories

NUCF16AB

CF10-1ABK(M10 × 1) NUCF18AB°

NPAB-1

Part code

Table-8 Dimension of recommended lubrication nozzle (for CF..AB, NUCF..AB)Dimension and shape
Applied model number

φ6

Figure-2

φ6

Applicablepart code

φ1.5

Table-5

Rc1/8

CF20ABNUCF20AB

CF20-1AB

NUCF20-1AB

CF24ABNUCF24AB

CF24-1AB

NUCF24-1AB

CF30ABNUCF30AB

CF30-1AB

NUCF30-2AB

CF30-2AB

CF-SFUCF

CFH*1)*2)

Stop plug is used for plugging unused lubrication hole(s).
Resin plug is used for preventing leakage of grease.

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Mounting
Mounting part
Hole for stud shall be perpendicular to mounting surface so as to ensure even contact between outer ringand rolling surface of mating material. Corner chamfer of hole shall be as small as around C0.5. Counter bore
diameter shall be dimension f or more as described in the dimension table.

● For application with heavy load, lubrication hole of stud shall be located outside of loading range (on theside to receive load). Location of the lubrication hole is indicated by “JNS” marking on the side of studflange. (Refer to Figure-5)
Hole at the center of stud is used as stopper for tightening or lubricant supply hole for grease lubrication.

Type CF-R with crowned outer ring is recommended in the case of application with insufficient contact
between outer ring and rolling surface of mating material.

Figure-5

Precaution for using spring washer
Figure-3

It is important to ensure that spring washer used for mounting cam follower has no burr or sharp edge.
Debris scraped from nut or mounting bracket by burr or shape edge of washer during tightening can invade
stud thread and can cause insufficient tightness or damage to thread.

Mounting method

Tightening torque of stud

● Cam follower shall be mounted so as not to incline against direction of the motion.

Stud of cam follower is subjected to bending stress or tensile stress by bearing load. Tightening torque shallbe set not to exceed the value in the dimension table.

● Mounting method to tighten cam follower directly to bracket by adding female thread to it without

using nut as depicted in Figure-4 (A) is NOT recommended. This method may cause damage on stud due
to concentration of bending stress in male thread portion in the event of loosening since it is difficult totighten the stud sufficiently.

Using double spring washers, double thin nut of JIS B 1181 or special nut with locking feature isrecommended in the case of possible loosening of mounting screw due to vibration or impact shock.

Figure-4
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Mounting of eccentric cam follower

Mounting of CF-SFU type

Adjustment of eccentric shall be performed in accordance with the following procedure.

Refer to Figure-7 for mounting method of easy mounting of CF-SFU type.

（1）Insert stud to mounting hole and tighten nut as the stud can turn loosely. Marking of stud shall face

Type CF-SFU is NOT recommended for application in the part subjected to vibration or shock impact asmuch as its mounting is simple. Standard cam followers with nut are recommended for application withpossible vibration or shock impact.

location indicated in Figure-6 in relation to direction of load.
（2）Gap between cam follower and mating contact surface may be adjusted by turning stud using hexagon

hole on the stud head.
（3）After completing adjustment, tighten nut with holding rotation of stud. Make it sure not to exceed

maximum tightening torque of the nut.

In the case of CFH12-AB
with lubrication hole or higher

In the case of CFH8A
without lubrication hole or lower

Figure-7

LoadLoad

Indicate relationship oflocation between JNS markand eccentric direction in thecase of CFH12-AB withlubrication hole or higher.

“O” mark indicates eccentric
direction in the case ofCFH8-A without lubrication
hole or lower. No relationshipbetween JNS mark andeccentric direction.

Figure-6

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