The Limit Load Ratings listed in this catalog were developed to rate bearings that operate in slow speed applications such as those encountered in aircraft control applications. For Bearing Life Calculations, please consult the Schatz Engineering Department.

Lazy Susanhardware heavy duty

For radial contact bearings calculate F with X = 1 and Y = 0. Next, recalculate F with X = 0.56 and Y = (see chart below). Use the larger value of F to determine L10 life.

Lazy SusanBearing 12 inch

Schatz dynamic radial load ratings are the radial bearing loads that will give a basic rating lifeof 1,000,000 revolutions. The basic dynamic load ratings have been determined in accordancewith the methods prescribed by ISO, ABMA, and ANSI.

Many life adjustment factors can be applied to the calculated bearing life as stated above. These factors are simply multiplied by the bearing life to determine the final adjusted operating life of the bearing.

\[L_{nA} = A_{1}\times A_{2}\times A_{3}\times A_{4}\times \left ( \frac{C_{r}}{F} \right )^{3}\times 10^{6}\]\[L_{nA,h} = \frac{16667}{S}\times L_{nA}\]

Lazy SusanBearing size

Never seemed fair to nail the "lazy" tag so permanently on the "Susans" but that probably has no "bearing" on the issue. Also called turntable bearings, they are the square or circular flat ball bearing devices YOU bolt between two flat objects to achieve rotation. Like that spinning center section of a Chinese restaurant table. We had these in surplus once and they were quite popular. To our chagrin, we discovered they could be bought commercially for the same price. So we did. The 4" square version is rated for a 300lb. load and the 12" round for 1000lbs.

The fatigue life of a bearing is defined by the number of revolutions the bearing will operate before the first signs of fatigue occur. The L10 life is the basic rating life in hours that 90% of a sufficiently large group of apparently identical bearings will operate before the first signs of fatigue appear.

Lazy SusanHardware kit

There are several material options for use with Schatz bearing. The following chart shows the life adjustment factors for the materials offered:

All formulas are based on an L10 life. If a different life needs to be calculated, use the following table for the adjustment factor:

Lubrication and the presence of an elastic-hydrodynamic lubrication film is critical to achieving proper bearing life. Please consult the Schatz engineering department for information on determining the lubrication factor for a specific application. While the calculation for the specific lubrication film thickness is complex, in general, choosing a grease with a base oil that has a high viscosity is more suitable for low to moderate speed and high load applications. Alternatively, grease with a low viscosity base is more suitable for high-speed applications with light to moderate loads.