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FAG / Tapered roller bearings

FAG K3775-3720

Tapered roller bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
50.8 mm
Outside diameterD
93.264 mm
WidthB
30.162 mm
Dynamic load ratingC
104 kN
Static load ratingC0
137 kN
Limiting speednG
7700 r/min

Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications13 parameters
Core specifications
ParameterSymbolValue
Bore diameterd50.8 mm
Outside diameterD93.264 mm
WidthB30.162 mm
Basic dynamic load ratingC104 kN
Basic static load ratingC0137 kN
Fatigue load limitPu17.3 kN
Reference speednref5500 r/min
Limiting speednG7700 r/min
Mass≈m0.862 kg
Precision classABMA4 — Class 4 (ANSI/ABMA 19.2:2013)
CageStandard — Sheet steel cage, window cage, roller-guided
Minimum operating temperatureTmin-30 °C
Maximum operating temperatureTmax120 °C
Product characteristics6 parameters
Product characteristics
ParameterSymbolValue
Tolerance classABMA4Class 4 (ANSI/ABMA 19.2:2013)
Heat treatmentStandard
CageStandardSheet steel cage, window cage, roller-guided
Internal designStandard
Quality levelStandard
Number of rows1Single-row design
Main Dimensions & Performance Data11 parameters
Main Dimensions & Performance Data
ParameterSymbolValue
Bore diameterd50.8 mm2 in
Outside diameterD93.264 mm3.672 in
Width, inner ringB30.302 mm1.193 in
Width, outer ringC23.812 mm0.937 in
Width, totalT30.162 mm1.187 in
Basic dynamic load rating, radialCr104,000 N23,381.295 lbf
Basic static load rating, radialC0r137,000 N30,800.36 lbf
Fatigue load limit, radialCur17,300 N3,889.388 lbf
Limiting speednG7,700 1/min
Thermal speed ratingnϑr5,500 1/min
Mass≈m0.862 kg1.9 lbs
Mounting dimensions9 parameters
Mounting dimensions
ParameterSymbolValue
Maximum diameter of shaft shoulderda max58 mm2.283 in
Minimum diameter of shaft shoulderdb min58 mm2.283 in
Minimum diameter of housing shoulderDa min80 mm3.15 in
Maximum diameter of housing shoulderDa max83 mm3.268 in
Minimum diameter of housing shoulderDb min88 mm3.465 in
Minimum axial spaceCa min3 mm0.118 in
Minimum axial spaceCb min5 mm0.197 in
Maximum fillet radius of shaftra max0.8 mm0.031 in
Maximum fillet radius of housingrb max3.3 mm0.13 in
Dimensions4 parameters
Dimensions
ParameterSymbolValue
Minimum chamfer dimension of inner ring back facer1, 2 min0.8 mm0.031 in
Minimum chamfer dimension of outer ring back facer3, 4 min3.3 mm0.13 in
Distance between the apexes of the pressure conesa22 mm0.866 in
Guidance rib diameter of inner ringd172.2 mm2.843 in
Temperature range2 parameters
Temperature range
ParameterSymbolValue
Operating temperature min.Tmin-30 °C-22 °F
Operating temperature max.Tmax120 °C248 °F
Calculation factors3 parameters
Calculation factors
ParameterSymbolValue
Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Ye0.34
Dynamic axial load factorY1.77
Static axial load factorY00.97
Capabilities & suitability5 parameters
Capabilities & suitability
ParameterSymbolValue
Radial load capacityYes
Axial load capacity in one directionYes
Suitable for grease lubricationYes
Suitable for oil lubricationYes
Unsealed designYes
Manufacturer Identity7 parameters
Manufacturer Identity
ParameterSymbolValue
Schaeffler Product Code2266410
BrandFAG
Base TypeK3775-3720
Base product2305091001
Bearing X designationK3775-3720
Mounting Manager IDK3775-3720
Grease application IDK3775-3720
Product Identity2 parameters
Product Identity
ParameterSymbolValue
ConstructionTapered roller bearings K-Series, in inch sizes, separable
Short DescriptionTapered roller bearing
Technical Data28 parameters
Technical Data
ParameterSymbolValue
Bore Diameter (D)50.8 mm
Outside Diameter (D)93.264 mm
Width (B)30.162 mm
Basic Dynamic Load Rating, Radial (Cr)104,000 N
Basic Static Load Rating, Radial (C0R)137,000 N
Operating Temperature Min. (Tmin)-30 °C
Limiting Speed (Ng)7,700 1/min
Operating Temperature Max. (Tmax)120 °C
Reference Speed (Nϑr)5,500 1/min
Maximum Fillet Radius Of Housing (Rb Max)3.3 mm
Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M)3.3 mm
Minimum Diameter Of Housing Shoulder (Da Min)80 mm
Minimum Diameter Of Housing Shoulder (Db Min)88 mm
Width, Outer Ring (C)23.812 mm
Fatigue Load Limit, Radial (Cur)17,300 N
Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E)0.34
Maximum Diameter Of Shaft Shoulder (Da Max)58 mm
Minimum Diameter Of Shaft Shoulder (Db Min)58 mm
Maximum Diameter Of Housing Shoulder (Da Max)83 mm
Dynamic Axial Load Factor (Y)1.77
Maximum Fillet Radius (Ra Max)0.8 mm
Minimum Axial Space (Cb Min)5 mm
Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M)0.8 mm
Guidance Rib Diameter Of Inner Ring (D1)72.2 mm
Minimum Axial Space (Ca Min)3 mm
Width, Inner Ring (B)30.302 mm
Static Axial Load Factor (Y0)0.97
Distance Between The Apexes Of The Pressure Cones (A)22 mm

Technical documents & data sheet

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Record identity
FAG K3775-3720
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