Explanation for Curve Roller
   
CURVE ROLLERS
Curve roller is composed of a stud used as the tray of a group of rollers and
a thick wall outer ring.The shoulder of the stud and the surface retaining ring
on the stud form the guiding faces on the two sides of the outer ring . When
the curve rollers are running on the plain tray or cam wheel, the inner stress
on the rollers will increase due to the deformation of the outer ring.Therefore
therated load shouldbe selected as curve roller column in this operational
case.


   
Strcture
KR Curve rollers radically guided by the retaining edge and ring
KR...PP Curve rollers with sealing ring
KRE Curve rollers with eccentric sleeve
KRE...PP Curve rollers with eccentric sleeve and retaining sleeve
KRV Curve rollers radically guided by the retaining edge and ring, full complement needle roller type
KRV...PP Curve rollers with sealing ring
KRVE Curve rollers with eccentric sleeve
KRVE...PP Curve rollers with eccentric sleeve and retaining sleeve
NUKR Curve rollers axile guided by rolling bodies, full roller type
NUKRE Curve rollers with eccentric sleeve
CR Inch series curve rollers
KR and KR...PP type curve rollers
In KR, KR..PP curve rollers, the rolling needles are guided by the retainer while the outer ring is guided by the retaining
ring shaft on the stud .These rollers are suitable for heave load and middle speed revolution. The lubricating can last a
long period due to the bigger grease storage space inside the bearing . KR...PP curve roller is of contacting sealing st-
ructure . The operational temperature is -30oC-100oC.
KRV and KRVˇ­PP Ptype curve rollers
KRV,KRV...PP curve rollers have the same structure as KR,KR...PP type but they are filled with needle bearings.They
can be used to bear heavier load and run with lower speed. They should be lubricated very often.
NUKR type curve rollers
This series curve rollers are of double lines full-roller structure.Like all cylindrical roller bearings,they are composed of
outer ring cages pressed in the rolling bodies axle guidance and the retaining edge steps which forms highly effective
gap sealing.
Especially heavy load canbe borne by these rollers and also they can sustain the axile load impact due to the axile
guidance by the rollers.
KRE, KRE...PP, KREV, KREV...PP, NUKRE type curve rollers
Curve rollers of all these types can be supplied with eccentric sleeve.The rollers can be adjusted by adjusting the stud
end face . The top of the eccentric sleeveis situatedat the place . Lubricating grease can be made through the both
ends of the stud.
 
THE TOLERANCE OF CURVE ROLLER
The dimensional tolerance and rotation precision of the standard bearing out ring is PO grade which is not applicable
to the arc shaped surface with tolerance0/-0.05mm. The diameter tolerance of the stud is h7. 
Assemblies
Sealing plug, lubricating spout
The oil holes that are not used must be plugged with sealing plugs in fitting.The sealing plugs should be pressed into
the oil holes with fitting central shaft with the dimensions in the table below. SLS will supply it when necessary. SLS
will also supply the pressure oil spouts with the dimensions listed in the following table:
 
Sealing plug Nominal
diameter		 Fitting central shaft dimensions Applicable size
D d-1 L-01
VD1 4 10 2.7 5.2 16-26
VD2 6 12 4.7 7.3 30-40
VD3 8 15 6.7 1 47-90
 
Oil spout Size mm Applicable size
D d L h
NPA1 6 4 6 1.5 16-26
NPA2 8 6 9 2 30-40
NPA3 10 8 12 3 47-90
 
Mounting
When mounting the curve rollers , attention must be given to the combination between the stud and hole.There should
be no gaps . The tolerances of the combinative hole are recommended as H7. There must be a small chamfered angle
in the combinative hole on the shaft to achieve the best support face .Anti-loosen measures must be taken for the cla-
mping stud. Nohammerstriking on the retaining edge of the stud is permitted in fitting . The groove on the top of the
studand be used to tighten the rollers withsuitable tools or to adjust the positions of the eccentric sleeves . The oil
holeson the stud trayshould be locatedin the non load area which is marked on the top of the stud retaining edge
with "SLS"

   
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