SIFT BEARING STORE CATALOG

621/612TimkenTapered Roller

621/612 is a Timken tapered roller bearing, bore 53.98 mm, O.D. 120.65 mm, width 41.27 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d53.98mm
Outside dia. D120.65mm
Width B41.27mm
Dynamic Cr207kN
Static C0r244kN
Weight2.18kg
Cr / C0r0.85
Mean dia. dm87.3mm

Original catalogue drawing - Timken TRB Catalog, page 214

621/612 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. D120.65 mmBore d53.98 mmWidth B41.27 mmCup width C31.75 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 diameter53.9752.125
DOutside diameter120.654.75
BInner-ring / bearing width41.2751.625
TOverall assembly width41.2751.625
CCup / outer-ring width31.751.25
rChamfer (min)3.30.1299

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)53.975
Bore d (in)2.1250
Outside dia. D (mm)120.650
Outside dia. D (in)4.7500
Width B (mm)41.275
Overall width T (mm)41.275
Overall width T (in)1.6250
Cup width C (mm)31.750

Load ratings & speeds

Basic dynamic load rating Cr (lbs)46600
Basic static load rating Cor (lbs)54800
Basic dynamic load rating Cr (N)207000
Basic static load rating C0r (N)244000
Dynamic rating C1 (N, ISO)207000
Dynamic rating C1 (lbf, ISO)46600
Radial rating C90 (N)53800
Radial rating C90 (lbf)12100
Thrust rating Ca90 (N)28900
Thrust rating Ca90 (lbf)6510
Static rating C0 (N)244000
Static rating C0 (lbf)54800
Factor e0.31
Factor Y1.91
Factor K1.86
Geometry factor G175.9
Geometry factor G216.2
Geometry factor Cg0.0694
Effective load centre a (mm)-14.0

Weight

Weight (kg)2.18
Cone weight (kg)1.34
Cup weight (kg)0.85
Total weight (kg)2.19

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)63.0
Shaft shoulder db (mm)70.0
Housing shoulder Da (mm)110.0
Housing shoulder Db (mm)105.0
Cage projection Aa (mm)3.8
Cage projection Ab (mm)1.9

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
451,7501023,386
634,50039213,083
825,8751,02434,133
1020,7002,15471,814
1513,8008,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 207,000 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.214 (dimensions) / p.40 (cone) / p.40 (cup)
Series typeTS

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

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
621/612-STimkenTapered Roller53.98120.6541.27207 kN2.19
624/612TimkenTapered Roller53.98120.6541.27207 kN2.19

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
621/612-STimkenTapered Roller53.98120.6541.27207 kN2.19

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
33895/33821TimkenTapered Roller53.9895.2528.57130 kN0.8
33895/33821DTimkenTapered Roller53.9895.2563.5226 kN1.75
33895/33822TimkenTapered Roller53.9895.2528.57130 kN0.81
389A/382TimkenTapered Roller53.9898.4221.95108 kN0.69
389A/382ATimkenTapered Roller53.9896.8421.95108 kN0.64
389A/384DTimkenTapered Roller53.9810052.39188 kN1.6
389A/384EDTimkenTapered Roller53.9810049.2188 kN1.52
39578/39520TimkenTapered Roller53.98112.7130.16167 kN1.44

Request a quotation for 621/612

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