SIFT BEARING STORE CATALOG

399A/394ATimkenTapered Roller

399A/394A is a Timken tapered roller bearing, bore 68.26 mm, O.D. 110 mm, width 22 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d68.26mm
Outside dia. D110mm
Width B22mm
Dynamic Cr98.9kN
Static C0r125kN
Weight0.75kg
Cr / C0r0.79
Mean dia. dm89.1mm

Original catalogue drawing - Timken TRB Catalog, page 252

399A/394A Timken Tapered Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

DdBOutside dia. D110 mmBore d68.26 mmWidth B22 mmCup width C18.82 mm

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

SymbolDimensionmminch
dBore diameter68.2622.6875
DOutside diameter1104.3307
BInner-ring / bearing width21.9960.866
TOverall assembly width220.8661
CCup / outer-ring width18.8240.7411
rChamfer (min)1.30.0512

Notes

Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)68.262
Bore d (in)2.6875
Outside dia. D (mm)110.000
Outside dia. D (in)4.3307
Width B (mm)21.996
Overall width T (mm)22.000
Overall width T (in)0.8661
Cup width C (mm)18.824

Load ratings & speeds

Basic dynamic load rating Cr (lbs)22200
Basic static load rating Cor (lbs)28100
Basic dynamic load rating Cr (N)98900
Basic static load rating C0r (N)125000
Dynamic rating C1 (N, ISO)98900
Dynamic rating C1 (lbf, ISO)22200
Radial rating C90 (N)25600
Radial rating C90 (lbf)5760
Thrust rating Ca90 (N)17600
Thrust rating Ca90 (lbf)3970
Static rating C0 (N)125000
Static rating C0 (lbf)28100
Factor e0.40
Factor Y1.49
Factor K1.45
Geometry factor G156.0
Geometry factor G221.4
Geometry factor Cg0.0984
Effective load centre a (mm)-0.8

Weight

Weight (kg)0.75

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)2.3
Housing fillet r max (mm)1.3
Shaft shoulder da (mm)74.0
Shaft shoulder db (mm)78.0
Housing shoulder Da (mm)105.0
Housing shoulder Db (mm)101.0
Cage projection Aa (mm)1.7
Cage projection Ab (mm)2.1

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
424,7251023,386
616,48339213,083
812,3621,02434,133
109,8902,15471,814
156,5938,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 98,900 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandTimken
Source catalogueTimken Tapered Roller Bearing Catalog (2016)
Catalogue pagep.252 (dimensions)
Series typeTS

ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
K399-A-394-AFAGTapered Roller68.261102286 kN0.781
K399-AS-394-AFAGTapered Roller68.261102286 kN0.781

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
399A/393TimkenTapered Roller68.2611022--
399AS/394ATimkenTapered Roller68.261102298.9 kN0.73

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
399A/3920TimkenTapered Roller68.26112.712298.9 kN0.94
399A/393TimkenTapered Roller68.2611022--
399A/393ASTimkenTapered Roller68.26111.122298.9 kN0.78
399A/394DTimkenTapered Roller68.2611052.39172 kN1.69
399AS/3920TimkenTapered Roller68.26112.712298.9 kN0.92
399AS/394ATimkenTapered Roller68.261102298.9 kN0.73
399AS/394DTimkenTapered Roller68.2611052.39172 kN1.65

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
33269/33461TimkenTapered Roller68.26117.4730.16-1.3
33269/33472TimkenTapered Roller68.2612030.16138 kN1.38
480/472TimkenTapered Roller68.2612029.01143 kN1.35
480/472ATimkenTapered Roller68.2612029.01143 kN1.32
480/472DTimkenTapered Roller68.2612065.09250 kN2.98
480/473TimkenTapered Roller68.2612029.01143 kN1.4
5557/5520TimkenTapered Roller68.26120.2551.7-2.23
560-S/552TimkenTapered Roller68.26123.8336.68-1.89

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