LM249747NW/LM249710CD is a Timken tapered roller bearing, bore 253.97 mm, O.D. 347.66 mm, height 101.6 mm. Dimensions, drawing, interchanges and price.
Original catalogue drawing - Timken TRB Catalog, page 668
Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.
Scale cross-section
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)
Symbol
Dimension
mm
inch
d
Bore diameter
253.975
9.999
D
Outside diameter
347.662
13.6875
T
Overall assembly width
101.6
4
C
Cup / outer-ring width
69.85
2.75
r
Chamfer (min)
1.5
0.0591
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)
253.975
Bore d (in)
9.9990
Outside dia. D (mm)
347.662
Outside dia. D (in)
13.6875
Overall width T (mm)
101.600
Overall width T (in)
4.0000
Cup width C (mm)
69.850
Cup width C (in)
2.7500
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
240000
Basic dynamic load rating Cr (N)
1070000
Dynamic rating C1 (N, ISO)
1070000
Dynamic rating C1 (lbf, ISO)
240000
Radial rating C90 (N)
159000
Radial rating C90 (lbf)
35700
Thrust rating Ca90 (N)
90500
Thrust rating Ca90 (lbf)
20300
Factor e
0.33
Factor Y1
2.03
Factor Y2
3.02
Factor K
1.76
Weight
Weight (kg)
23.62
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.5
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
272.0
Housing shoulder Da (mm)
333.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
267,500
102
3,386
6
178,333
392
13,083
8
133,750
1,024
34,133
10
107,000
2,154
71,814
15
71,333
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,070,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
Brand
Timken
Source catalogue
Timken Tapered Roller Bearing Catalog (2016)
Catalogue page
p.668 (dimensions)
Series type
TNASW
ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.
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.
