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Timken 27687 is a single row tapered roller bearing cone (inner ring and roller assembly) for industrial applications. This component is part of the Timken 4-8 inch outside diameter (OD) size class and is designed to be paired with a matching cup to form a complete bearing set capable of handling combined radial and axial loads. Typical uses include gearboxes, conveyors, and industrial machinery where precise shaft location and high load capacity are required.
MODEL 27687
$92.01 Each
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Returnable: Yes
1.3 mm Cage-cone frontface clearance
0.09 in
2.3 mm Cone backface backing diameter
3.78 in
25.400 mm Design units
Imperial Heat generation factor (rib-roller end):41.8 Heat generation factor (roller-raceway):98.2 Series:27600 Static radial rating:39900 lbf 178000 N d - Cone Bore:1/4 in
89 mm Cone part number
27687 Cone width:1.0000 in
96 mm Cone frontface backing diameter
3.5 in
a - Effective Center Location
0.02 in 0.5 mm
Aa - Cage-Cone Backface Clearance
0.05 in 1.3 mm
Ab - Cage-Cone Frontface Clearance
0.09 in 2.3 mm
B - Cone Width
1 in 25.4 mm
C
4860 lbf 21600 N
C0 - Static Radial Rating
39900 lbf 178000 N
C1 - Dynamic Radial Rating (1 million revolutions)
26300 lbf 117000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)
45900 lbf 204000 N
C90 - Dynamic Radial Rating (90 million revolutions)
6830 lbf 30400 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)
11900 lbf 52900 N
Cage type
Stamped Steel Cage-cone backface clearance:0.05 in
Cage Type
Stamped Steel
Cage-Cone Backface Clearance
0.05 in
Cage-Cone Frontface Clearance
0.09 in
Cg - Geometry Factor
0.120
Cone Backface 'To Clear' Radius
0.14 in
Cone Backface Backing Diameter
3.78 in
Cone Bore
3 1/4 in
Cone Frontface Backing Diameter
3.5 in
Cone Part Number
27687
Cone Width
1 in
d - Cone Bore
3 1/4 in 82.550 mm
da - Cone Frontface Backing Diameter
3.5 in 89 mm
db - Cone Backface Backing Diameter
3.78 in 96 mm
Design Units
Imperial
Dynamic Radial Rating (1 million revolutions)
26300 lbf
Dynamic Radial Rating (90 million revolutions)
6830 lbf
Dynamic Radial Rating (Two-Row, 1 million revolutions)
45900 lbf
Dynamic Radial Rating (Two-Row, 90 million revolutions)
11900 lbf
Effective Center Location
0.02 in
Factor
1.4
G1 - Heat Generation Factor (Roller-Raceway)
98.2
G2 - Heat Generation Factor (Rib-Roller End)
41.8
Geometry Factor
0.12
Heat Generation Factor (Rib-Roller End)
41.8
Heat Generation Factor (Roller-Raceway)
98.2
K - Factor
1.4
R - Cone Backface "To Clear" Radius
0.14 in 3.600 mm
Series
27600
Static Radial Rating
39900 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