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ParameterSKFNUKR 52 ACam follower (stud-type track roller) with integral sealing and relubrication featureINANUKR5220 × 52 × 66 mm
Comparable specifications
BrandSKFINA
DesignationNUKR 52 ANUKR52
Product familyCam followers (Stud-type track rollers)—
Detailed typeCam follower (stud-type track roller) with integral sealing and relubrication featureStud type track roller
Bore diameterd—20 mm
Outside diameterD52 mm52 mm
WidthB—66 mm
Basic dynamic load ratingC29.7 kN29 kN
Basic static load ratingC036 kN41.5 kN
Fatigue load limitPu4.25 kN5.4 kN
Limiting speednG3200 r/min4200 r/min
Mass≈m0.512 kg0.449 kg
Internal clearanceBetween C2 and CN—
SealingSeal on both sides—
CageWithout—
Bearing materialBearing steel—
LubricantGrease—
Dimensions
Functional outside diameter52.0 mm—
Stud diameter20.0 mm—
Length66.0 mm—
Width, outer ring24.0 mm—
Engineering — Associated products
Lubrication adapterAP 10—
Engineering — Calculation data
Maximum dynamic radial loadsF rmax. 18 kN—
Maximum static radial loadsF 0rmax. 25.5 kN—
Engineering — Dimensions
Attachment diameterd20 mm—
Total lengthB66 mm—
Width outer ringC24 mm—
Length shank on studB 140.5 mm—
Distance lubrication hole to flange ringB 29 mm—
Distance face outer ring to face side washerC 10.8 mm—
Outside diameter flange ringd 131 mm—
Thread studGM 20x1.5—
Length threadG 121 mm—
Seat diameter for lubrication accessoriesM6 mm—
Diameter of lubrication hole (shank)M 14 mm—
Width across flatsSW10 mm—
Chamfer dimensionr 1,2min. 1 mm—
Engineering — Included products
Grease fittingNIP A2x7.5—
Hexagonal nutM 20x1.5—
Engineering — Mounting information
Recommended tightening torque120 N·m—
Logistics
Product net weight0.512 kg—
eClass code23-05-09-03—
UNSPSC code31171512—
Manufacturer Identity
Schaeffler Product Code—400135
Base Type—NUKR52
Gpsd Group—I03
Product Line Id—13
X Life Marking—n.r.
Product identity
Official product categoryCam followers (Stud-type track rollers)—
Official taxonomy path/products/rolling-bearings/track-rollers/cam-followers—
Structure group IDBNT_004—
Available from SKFYes—
RemanufacturableNo—
Product Identity
Construction—Stud type track rollers NUKR..-A, double row cylindrical roller bearings with particularly thick-walled outer ring, full complement cylindrical roller setand with a solid roller stud with fixing thread and a mounting aid, the outer ring is guided axially by the rolling elements, labyrinth seals on both sides,without eccentric collar
Short Description—Stud type track roller
Properties
Rolling elementsCylindrical rollers—
Number of rows2—
Outer ring profileCrowned—
Stud alignmentCentric—
Number of flanges, outer ring2—
Feature for tighteningHexagonal recess—
Radial internal clearanceBetween C2 and CN—
Tolerance classOther—
Material, bearingBearing steel—
CoatingWithout—
Sealing typeLabyrinth—
Relubrication featureCentre of each stud end and radial hole in stud shank—
Technical Data
Fit Diameter Of Roller Stud / Stud (D1)—20 mm
Outside Diamater (D)—52 mm
Total Width (B)—66 mm
Basic Dynamic Load Rating, Radial (Cr W)—29,000 N
Basic Static Load Rating, Radial (C0R W)—41,500 N
Speed On Permanent Grease Lubrication (Nd G)—4,200 1/min
Distance To Lubrication Hole (B3)—9 mm
Bolt/Stud Length Effectively (B2)—40.5 mm
Width Of Flats (W)—10 mm
Diameter Lubrication Hole (D3)—4 mm
Width, Outer Ring (C)—24 mm
Protrusion Outer Ring To Thrust Washer (C1)—0.8 mm
Permissible Static Load, Radial (F0R Per)—34,000 N
Thread Length (Ig)—21 mm
Permissible Dynamic Load Outer Ring, Radial (Fr Per)—17,100 N
Stop Diameter Of Thrust Washer (D2)—31 mm
Tightening Torque Nut (Ma)—120 Nm
Fatigue Load Limit, Radial (Cur W)—5,400 N
Minimum Chamfer Dimension (Rmin)—1 mm
Witdh Of Thrust Washer (B1)—25.6 mm

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