ALLSHAFT REPAIR
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ALL ABOUT OD GRINDING
Despite the name, OD grinding is not just about shaping the outside diameter (OD) of a part. As a type of cylindrical grinding, it requires that the object being ground has a central axis of rotation.
In fact, OD grinding occurs on the external surface of a workpiece between the centers — and that is a critical distinction.
True Center Matters
The centers are not just some hypothetical spots on a part. The centers are end points that hold the object at the geometric true center, move it in a rotational direction, and allow for the grinding action.
The workpiece rotates around that fixed, true center axis. At the same time, the grinding wheel is rotated in the same direction as the object.
When the two surfaces make contact, they are then moving in opposite directions. This allows for smoother operation while reducing the chance of the wheel and workpiece jamming up.
Benefits of OD Grinding
There is a huge advantage to OD grinding and its requirement that you find the true center of a circular part. That is, you can take something that is out of round and make it perfect. Although, since grinding removes material, the part will be smaller.
Unlike with centerless grinding, with OD grinding you can remove unacceptable geometry and return a part to perfect circularity. That means the process can be used to restore or create roundness, to address issues such as ovalness, lack of concentricity, and other circular defects.
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Here at Allshaft Repair we have 2 Studer S30 CNC Grinders with the capabilities to
OD Grind from 8" max OD x 40".
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