How to Calculate Bearing Size

••• kool99/iStock/GettyImages

Determine the size of a replacement ball bearing before heading to the store or placing an order to avoid wasting money and time. Typically, cylindrical-shaped ball bearings contain a set of balls that allow the outer casing to spin freely. Ball bearings come in many sizes for an array of equipment, from skateboard wheels to industrial equipment. The size of a bearing is calculated by finding its relevant dimensions in millimeters.

    Measure the thickness of the old bearing, as viewed from its edge, in millimeters. This ensures that the bearing fits into the circular hole in the equipment.

    Measure the diameter of the central hole in the bearing in millimeters to be sure that the bearing fits on the axle of the device you will use it with. The diameter is the width of a circle, measured on a line that passes through its center.

    Determine the total diameter of the bearing in millimeters.

Related Articles

How to Read a Metric Micrometer
How to Disassemble a Starrett Micrometer
How to Calculate the Volume of an Auger
How to Use a Bushnell Voyager Telescope
How to Calculate Rack & Pinion
Instructions for Using a General Tools 17 Square Head...
How to Convert mm to Fractional Inches
How to Find the Radius of an Arc
How to Find Bearing Numbers by Size
How to Determine the Diameter of a Circle
How to Calculate Gear Pitch
How to Calculate Mechanical Advantage Screws
SDR-35 PVC Pipe Specifications
How to Convert Inches to 16ths of an Inch
How to Build a Windmill Model
How to Make a Homemade Telescope Using Old Camera Lenses
What Is a Rubber Stopper?
How to Calculate the Diameter of a Circle From a Linear...
Precautions to Take When Using Micrometer Screw Gauge
What are Gehl 4625 Skid Steer Specifications?