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Timken LL639249 is a tapered roller bearing cup (outer ring) for heavy-duty industrial applications. This component is part of the 4-8 inch outside diameter size class and is designed to be paired with a matching cone to form a complete tapered roller bearing assembly. It is suitable for gearboxes, conveyors, and other equipment requiring combined radial and axial load capacity.
MODEL LL639249
$1,233.06 Each
Prices are subject to change
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Returnable: Yes
1 mm Cage-cone frontface clearance
0.14 in
203 mm Cone part number
LL639249 Cone width:0.9062 in
205 mm Cone frontface backing diameter
7.99 in
23.017 mm Design units
Imperial Heat generation factor (rib-roller end):230.2 Heat generation factor (roller-raceway):443 Static radial rating:76300 lbf 340000 N d - Cone Bore:7.7500 in
3.6 mm Cone backface backing diameter
8.07 in
a - Effective Center Location
0.69 in 17.5 mm
Aa - Cage-Cone Backface Clearance
0.04 in 1 mm
Ab - Cage-Cone Frontface Clearance
0.14 in 3.6 mm
B - Cone Width
0.9062 in 23.017 mm
C
7190 lbf 32000 N
C0 - Static Radial Rating
76300 lbf 340000 N
C1 - Dynamic Radial Rating (1 million revolutions)
38800 lbf 172000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)
67500 lbf 300000 N
C90 - Dynamic Radial Rating (90 million revolutions)
10100 lbf 44700 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)
17500 lbf 77800 N
Cage type
Stamped Steel Cage-cone backface clearance:0.04 in
Cage Type
Stamped Steel
Cage-Cone Backface Clearance
0.04 in
Cage-Cone Frontface Clearance
0.14 in
Cg - Geometry Factor
0.133
Cone Backface 'To Clear' Radius
0.06 in
Cone Backface Backing Diameter
8.07 in
Cone Bore
7.7500 in
Cone Frontface Backing Diameter
7.99 in
Cone Part Number
LL639249
Cone Width
0.9062 in
d - Cone Bore
7.7500 in 196.850 mm
da - Cone Frontface Backing Diameter
7.99 in 203 mm
db - Cone Backface Backing Diameter
8.07 in 205 mm
Design Units
Imperial
Dynamic Radial Rating (1 million revolutions)
38800 lbf
Dynamic Radial Rating (90 million revolutions)
10100 lbf
Dynamic Radial Rating (Two-Row, 1 million revolutions)
67500 lbf
Dynamic Radial Rating (Two-Row, 90 million revolutions)
17500 lbf
Effective Center Location
0.69 in
Factor
1.4
G1 - Heat Generation Factor (Roller-Raceway)
443
G2 - Heat Generation Factor (Rib-Roller End)
230.2
Geometry Factor
0.133
Heat Generation Factor (Rib-Roller End)
230.2
Heat Generation Factor (Roller-Raceway)
443
K - Factor
1.4
R - Cone Backface "To Clear" Radius
0.06 in 1.520 mm
Static Radial Rating
76300 lbf
This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read moreHow do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more