|Centerless Grinding Guidelines|
- The largest diameter of the workpiece should have the ground surface, if possible. This allows through-feed grinding.
- The axial length of a centerless-ground workpiece should be at least equal to the diameter. Short workpieces are more susceptible to surfaces that deviate from right circular cylindricity.
- Radii should be as uniform as possible in order to simplify wheel dressing and/or set up changes.
- For a flat at the end of a shaft, it is preferable to incorporate a matching flat on the opposite side of the shaft. This will prevent a high spot from forming opposite the flat. Alternatively, the flat can be brought inboard so that the end is a complete cylinder, as shown below in the right-hand view.
- Holes with diameter to depth ratios of over four should be avoided unless widening of the mouth of the hole can be accomodated, as illustrated below.
- As the following diagram shows, internal grinding should allow for as large a diameter tool support as possible. This illustration shows a hole with an entrance that is smaller than that of the ground area.
- When face-grinding turned surfaces, ground undercuts should be avoided. As the figure below shows, face undercuts require specially-dressed grinding wheels that are expensive to maintain and replace.
- If at all possible, blind holes should be avoided. If a blind hole must be implemented, the middle two geometries of the following diagram can help with grinding.
- The figure below illustrates how ends of in-feed ground parts need to be terminated for satisfactory results. The included angle of the pointy end should be less than 120 degrees. If in-feed grinding is not used, ends of cylindrical parts should not be ground.
- Some examples of dimensioned centerless-ground parts are shown in centerless grinding.