21311 EK

Spherical roller bearing with tapered bore and relubrication features

Spherical roller bearings can accommodate heavy loads in both directions.

They are self-aligning and accommodate misalignment and shaft deflections, with virtually no increase in friction or temperature. The design includes features to facilitate relubrication. The bearings can be used in a modular system, including housings, sleeves and nuts.

  • Accommodate misalignment
  • High load carrying capacity
  • Relubrication features
  • Low friction and long service life
  • Increased wear resistance

Dimensions

d
55 mm
 Bore diameter
D
120 mm
 Outside diameter
B
29 mm
 Width
d2
≈72.7 mm
 Shoulder diameter of inner ring
D1
≈96.2 mm
 Shoulder/recess diameter of outer ring
b
6 mm
 Width of lubrication groove
K
3 mm
 Diameter of lubrication hole
r1,2
min.2 mm
 Chamfer dimension
Abutment dimensions - 21311 EK

Abutment dimensions

Da
max.109 mm
 Diameter of housing abutment
ra
max.2 mm
 Radius of fillet

Calculation data

SKF performance class
SKF Explorer
Basic dynamic load rating C
159 kN
Basic static load rating C0
166 kN
Fatigue load limit Pu
18.6 kN
Reference speed
5 600 r/min
Limiting speed
7 500 r/min
Limiting value e
0.24
Calculation factor Y1
2.8
Calculation factor Y2
4.2
Calculation factor Y0
2.8

Mounting information

Recommended tightening angle for lock nut α
115 °

Tolerance class

Dimensional tolerances
Normal
Radial run-out
P5

 

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SKU: 21311 EK-SKF Categories: , ,
SKF

Description

Properties

Number of rows 2
Locating feature, bearing outer ring Without
Bore type Tapered 1:12
Cage Sheet metal
Radial internal clearance CN
Tolerance class for dimensions Normal
Tolerance class for run-out P5
Sealing Without
Lubricant None
Relubrication feature With

Logistics

Product net weight 1.64 kg
eClass code 23-05-09-11
UNSPSC code 31171510

Recommended product

Withdrawal sleeve, basic design, ISO standards AHX 311
Adapter sleeve with KM lock nut and MB lock washer, metric dimensions H 311
Adapter sleeve with KM lock nut and MB lock washer, metric dimensions with inch bore HA 311
Adapter sleeve with AN or N lock nut and W lock washer, inch dimensions SNW 11X1.15/16

(55X120X29) (21311EK) (21311K) (21311CCK)

Additional information

Weight 1.64 kg
Size (mm)

Colour

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