Auburn Ball Bearing
4 Rt 350 Macedon, NY 14502 USA Tel 315-986-7600 Fax 315-986-8293 • E-mail: sales@auburnbearing.com

Engineering Data

Auburn bearing ratings are based upon 3500 hours life expectancy of 90% of the bearings with an average life expectancy of 10,000 hours when used with the following factors:

Safety Factor = 1.000 (Light Service - Steady Load)
Life Factor = 1.00 (3500 Hours)
Speed Factor = (Dependant upon R.P.M.)

-------------- Bearing Selection

To determine the thrust load capacity of the selected bearing but using different factors than those noted above, the following formula must be used:

R x f = Thrust Load Capacity in Pounds
F x L
Where: F = Safety Factor
  L = Life Factor
  f = Speed Factor
  R = Catalog Rating in Pounds @ 100 R.P.M.

To select a bearing for a specific thrust load capacity, the following formula must be used:

G x F x L = Thrust Load Capacity, in pounds, required at 100 R.P.M. (See note)

f
Where: G = Given or assumed load
  F = Safety Factor
  L = Life Factor
  f = Speed Factor

Note: Under 100 R.P.M. column on the appropriate page select a load equal to or greater that the required load found above. The proper bearing number appears to the left.

------------- Safety Factors Character Of Load
Service Duration of Service per day Steady Variable Shocks
Very Light Intermittant 0.5 1 2
Light Under 1 hr. 1 2 3
Moderate 8 hrs. 2 3 4
Heavy 16 hrs. 3 4 5
Extreme 24 hrs. 4 5 6

 

---- Life Factors  
---- Speed Factors
Hours   "L"     R.P.M.     "f"
500   0.546     1     4.000
1000   0.636     3     2.873
2500   0.909     5     2.464
3500   1.000     10     2.000
5000   1.182     25     1.518
7500   1.364     35     1.372
10000   1.455     50     1.232
20000   1.818     75     1.091
30000   2.091     100     1.000
50000   2.456     150     0.885
          200     0.812
          250     0.759
          300     0.718
          400     0.661
          500     0.616
          750     0.545
          1000     0.500
          1250     0.468
          1500     0.443