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How to Cut Oil Grooves in a Bearing

Cutting grooves into a bearing can improve performance by increasing the surface area that is in direct contact with the lubricant. There are many different ways to do this, but it is always a good idea, if possible, to check with the manufacturer first. Some bearings do not work as well without smooth surfaces.

Instructions

1

Use a professionally designed groove cutter if you are working on complicated automotive bearings. These machines arent cheap, but they ensure a proper cut each time. You can also take your parts to a shop that has a groove cutting machine and have it done there.

2

Choose what type of groove is best for the bearing you are working on. Circumferential groove bearings, in which the groove goes around the entire bearing, are best for connecting rod bearings because they distribute lubricant very evenly. Multiple groove bearings, in which the grooves are simply cut in a noncircular pattern, are used to provide a more general increase in lubrication.

3

Put the bearing securely in a shop vice if you are cutting a circumferential groove and you do not have specialized equipment for doing so. Cut carefully around it with a grinding tool. This wont be nearly as perfect as a store-bought circumferential bearing, but may work better than the original.

4

Place the bearing securely in the vise if you are cutting multiple grooves. Make four straight grooves down the sides of the bearing. You can cut more or less depending on how much surface area you want the lubricant to contact.