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FAG / Tapered roller bearings

FAG KM38549-M38510

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

Technical data available
Bore diameterd
34.925 mm
Outside diameterD
66.675 mm
WidthB
20.638 mm
Dynamic load ratingC
53 kN
Static load ratingC0
63 kN
Limiting speednG
11200 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 diameterd34.925 mm
Outside diameterD66.675 mm
WidthB20.638 mm
Basic dynamic load ratingC53 kN
Basic static load ratingC063 kN
Fatigue load limitPu7.7 kN
Reference speednref7300 r/min
Limiting speednG11200 r/min
Mass≈m0.32 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 diameterd34.925 mm1.375 in
Outside diameterD66.675 mm2.625 in
Width, inner ringB20.638 mm0.813 in
Width, outer ringC16.67 mm0.656 in
Width, totalT20.638 mm0.813 in
Basic dynamic load rating, radialCr53,000 N11,915.468 lbf
Basic static load rating, radialC0r63,000 N14,163.669 lbf
Fatigue load limit, radialCur7,700 N1,731.115 lbf
Limiting speednG11,200 1/min
Thermal speed ratingnϑr7,300 1/min
Mass≈m0.32 kg0.705 lbs
Mounting dimensions8 parameters
Mounting dimensions
ParameterSymbolValue
Maximum diameter of shaft shoulderda max40 mm1.575 in
Minimum diameter of shaft shoulderdb min46.5 mm1.831 in
Minimum diameter of housing shoulderDa min58 mm2.283 in
Minimum diameter of housing shoulderDb min62 mm2.441 in
Minimum axial spaceCa min3 mm0.118 in
Minimum axial spaceCb min4 mm0.157 in
Maximum fillet radius of shaftra max3.6 mm0.142 in
Maximum fillet radius of housingrb max2.3 mm0.091 in
Dimensions4 parameters
Dimensions
ParameterSymbolValue
Minimum chamfer dimension of inner ring back facer1, 2 min3.6 mm0.142 in
Minimum chamfer dimension of outer ring back facer3, 4 min2.3 mm0.091 in
Distance between the apexes of the pressure conesa15 mm0.591 in
Guidance rib diameter of inner ringd150.8 mm2 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 Ye0.35
Dynamic axial load factorY1.7
Static axial load factorY00.94
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 Code2267895
BrandFAG
Base TypeKM38549-M38510
Base product2305091001
Bearing X designationKM38549-M38510
Mounting Manager IDKM38549-M38510
Grease application IDKM38549-M38510
Product Identity2 parameters
Product Identity
ParameterSymbolValue
ConstructionTapered roller bearings K-Series, in inch sizes, separable
Short DescriptionTapered roller bearing
Technical Data27 parameters
Technical Data
ParameterSymbolValue
Bore Diameter (D)34.925 mm
Outside Diameter (D)66.675 mm
Width (B)20.638 mm
Basic Dynamic Load Rating, Radial (Cr)53,000 N
Basic Static Load Rating, Radial (C0R)63,000 N
Operating Temperature Min. (Tmin)-30 °C
Limiting Speed (Ng)11,200 1/min
Operating Temperature Max. (Tmax)120 °C
Reference Speed (Nϑr)7,300 1/min
Maximum Fillet Radius Of Housing (Rb Max)2.3 mm
Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M)2.3 mm
Minimum Diameter Of Housing Shoulder (Da Min)58 mm
Minimum Diameter Of Housing Shoulder (Db Min)62 mm
Width, Outer Ring (C)16.67 mm
Fatigue Load Limit, Radial (Cur)7,700 N
Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E)0.35
Maximum Diameter Of Shaft Shoulder (Da Max)40 mm
Minimum Diameter Of Shaft Shoulder (Db Min)46.5 mm
Dynamic Axial Load Factor (Y)1.7
Maximum Fillet Radius (Ra Max)3.6 mm
Minimum Axial Space (Cb Min)4 mm
Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M)3.6 mm
Guidance Rib Diameter Of Inner Ring (D1)50.8 mm
Minimum Axial Space (Ca Min)3 mm
Width, Inner Ring (B)20.638 mm
Static Axial Load Factor (Y0)0.94
Distance Between The Apexes Of The Pressure Cones (A)15 mm

Technical documents & data sheet

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Record identity
FAG KM38549-M38510
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