SIFT BEARING STORE CATALOG

644/632DTimkenTapered Roller

644/632D is a Timken tapered roller bearing, bore 71.44 mm, O.D. 136.53 mm, height 95.25 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d71.44mm
Outside dia. D136.53mm
Overall width T95.25mm
Dynamic Cr481kN
Weight5.7kg
Mean dia. dm104mm

Original catalogue drawing - Timken TRB Catalog, page 540

644/632D 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

DdTOutside dia. D136.53 mmBore d71.44 mmOverall width T95.25 mmCup width C76.2 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 diameter71.4372.8125
DOutside diameter136.5255.375
TOverall assembly width95.253.75
CCup / outer-ring width76.23
rChamfer (min)1.50.0591

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)71.437
Bore d (in)2.8125
Outside dia. D (mm)136.525
Outside dia. D (in)5.3750
Overall width T (mm)95.250
Overall width T (in)3.7500
Cup width C (mm)76.200
Cup width C (in)3.0000

Load ratings & speeds

Basic dynamic load rating Cr (lbs)108000
Basic dynamic load rating Cr (N)481000
Dynamic rating C1 (N, ISO)481000
Dynamic rating C1 (lbf, ISO)108000
Radial rating C90 (N)71600
Radial rating C90 (lbf)16100
Thrust rating Ca90 (N)44400
Thrust rating Ca90 (lbf)9980
Factor e0.36
Factor Y11.86
Factor Y22.78
Factor K1.61
Geometry factor G1106.4
Geometry factor G221.0
Geometry factor Cg0.0814

Weight

Weight (kg)5.7

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)1.5
Shaft shoulder db (mm)87.0
Housing shoulder Da (mm)125.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4120,2501023,386
680,16739213,083
860,1251,02434,133
1048,1002,15471,814
1532,0678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 481,000 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.540 (dimensions)
Series typeTDO

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

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
645/632DTimkenTapered Roller71.44136.5395.25481 kN5.64

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
644/632TimkenTapered Roller71.44136.5341.27276 kN2.56
644/633TimkenTapered Roller71.44130.1841.27276 kN2.22

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
33281/33461TimkenTapered Roller71.44117.4730.16138 kN1.23
33281/33462TimkenTapered Roller71.44117.4730.16138 kN1.22
33281/33462DTimkenTapered Roller71.44117.4766.67241 kN2.73
33281/33472TimkenTapered Roller71.4412030.16138 kN1.31
47490/47420TimkenTapered Roller71.4412032.55179 kN1.41
47490/47420DTimkenTapered Roller71.4412071.44311 kN3.01
47490/47423TimkenTapered Roller71.44120.6532.55179 kN1.45
47675/47620TimkenTapered Roller71.44133.3533.34214 kN2.06

Request a quotation for 644/632D

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

Online enquiry formrichard@bearingsfit.com