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Information

Lubrication

Running conditions

Contamination factor

Detailed Results - SKF Rating Life & ISO 281:1990 Basic Rating Life

Title: Ejemplo claseName: Clase D2

Company (etc.): UCV

Lubrication specification method: Two viscosities at operating temperature for a known lubricant

Lubrication method: Grease

Temperature Viscosity

C mm2/s

First point: 40 32.0

Second point: 100 7.0EP additives: No

Time Speed Temp Radial load Axial load

r/min C kN kN

Interval 1: 100 900 43 4.9 0.0

Interval 2: 50 1000 48 6.0 0.0

Interval 3: 70 1200 52 7.0 0.0

Static loads: 4.9 0.0

Cleanliness classification: Typical contamination

Assembly at workshop, bearing not washed out prior to assembly, poor sealing.

Regreasing intervals longer than recommended by manufacturer.

Bearing type: Deep groove ball bearings, Single row

Designation: 61834

SKF rating life

L10mh

: 57700 hours

L10m

: 3850 106rev

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Resulting loads61834 (Deep groove ball bearings, Single row)

Additional results

Summary - SKF Rating Life

ISO basic rating life

L10h

: 17200 hours

L10

: 1110 106rev

Relubrication intervals

Combined tf: 13100 hours

Grease quantity replenish

Through lubrication holes: 9.5 grams

From the side: 24 grams

Bearing life per interval:

Interval Time Speed Temp Operating

viscosity

L10h

L10

c

aSKF

Notes

% r/min C mm2/s hours 106rev

1 45 900 43 28.9 37200 2010 3.2 0.19 5.8

2 23 1000 48 24.6 18200 1090 3.0 0.18 3.7

3 32 1200 52 21.7 9560 688 2.9 0.18 2.8

Relubrication operating hours (tf):

Interval tfhours

1 18700

2 134003 9030

Interval Radial load Axial load Equivalent load Radial direction Notes

kN kN kN degrees

1 4.9 0.0 4.9 0

2 6.0 0.0 6.0 03 7.0 0.0 7.0 0

Static load 4.9 0.0 4.9 0

Bearing Defect Frequencies:

Bearing type: Deep groove ball bearings, Single row

Position: Left side (0.0 mm)

Designation: 61834

Interval Shaft speed

frequency

Inner race defect

frequency (BPFI)

Outer race defect

frequency (BPFO)

Cage defect

frequency (FTF)

Ball spin

frequency

(BSF)

Rolling element

defect frequency

Hz Hz Hz Hz Hz Hz

1 15.00 200.64 174.36 6.97 106.47 212.93

2 16.67 222.94 193.73 7.75 118.30 236.59

3 20.00 267.52 232.48 9.30 141.96 283.91

Bearing type: Deep groove ball bearings, Single row

Designation: 61834

Clearance: Normal

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Designation d D B C C0

L10m

L10mh

S0

Notes

mm mm mm kN kN 106rev hours

61834 170.0 215.0 22.0 61.8 78.0 3850 57700 >10

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